HAMILTON SUNDSTRAND CORPORATION Patent applications |
Patent application number | Title | Published |
20160136570 | AIR SEPARATION MODULE WITH INCREASED PERMEATE AREA - An air separation module includes a plurality of fibers located within a casing. A fiber membrane defines an exterior of each of the plurality of fibers. The fiber membrane also forms an interior passage along a length of each of the plurality of fibers. The fiber membrane is configured to permeate a gas through the fiber membrane. At least one perforated canister is placed between the plurality of fibers. The at least one perforated canister is configured to collect a permeated gas from the plurality of fibers. | 05-19-2016 |
20160123237 | VARIABLE PRESSURE AIR SUPPLY - The present disclosure relates to engine buffer systems. An engine buffer system may include a low pressure supply line and a high pressure supply line. A continuously variable valve may be coupled to and/or in fluid communication with the low pressure supply line and the high pressure supply line. The continuously variable valve may be adjusted to supply any pressure between a pressure of the low pressure supply line and a pressure of the high pressure supply line to a buffer line. | 05-05-2016 |
20160118734 | SINGLE FLEX PRINTED WIRING BOARD FOR ELECTRIC SYSTEM CONTROLLER - According to an aspect of the present invention, there is provided an apparatus that comprises a first printed wiring board and a second printed wiring board that utilize connectors to communicatively couple the apparatus to a processing system. The apparatus further includes at least one additional connector configured to electrically and/or mechanically connect the first and second printed wiring boards so as to eliminate the need for a printed wiring board backplane. | 04-28-2016 |
20160107754 | SINGLE STAGE ENGINE BLEED - An environmental control system is provided. The environmental control system may receive pressurized air from a single supply line. A pressure regulating turbomachine may be located within the supply line. A motor-generator may be coupled to the pressure regulating turbomachine. In response to a pressure in the supply line being less than a desired pressure in the environmental control system, the motor-generator may supply energy to the pressure regulating turbomachine, causing the pressure regulating turbomachine to function as a compressor. In response to a pressure in the supply line being greater than a desired pressure in the environmental control system, the pressure regulating turbomachine may function as a turbine and supply energy to the motor-generator. | 04-21-2016 |
20160097400 | IMPELLER FOR ENGINE-MOUNTED BOOST STAGE FUEL PUMP - A impeller for a centrifugal pump has an inducer section. The inducer section has first and second pluralities of blades, each having a plurality of polygonal cross-sections defined by a plurality of vertices. The pluralities of vertices are defined by tables of vertex locations. A method of making a centrifugal pump includes forming an impeller that has an inducer section, as described above, and an impeller section. The impeller is fluidly connected downstream of the inducer section and has third, fourth, and fifth pluralities of blades, each having a plurality of polygonal cross-sectional areas defined by a plurality of vertices. The pluralities of vertices are defined by tables of vertex locations. | 04-07-2016 |
20160097399 | VOLUTE FOR ENGINE-MOUNTED BOOST STAGE FUEL PUMP - A housing has walls that define a volute passage and a diffuser passage fluidly connected to the volute passage. The volute passage has a first subsection and a second subsection, each having cross-sectional areas defined by tabular data. A centrifugal pump has a rotor and a housing, the housing having walls defining a volute passage and a diffuser passage fluidly connected to the volute passage. The volute passage has a first subsection and a second subsection, each having cross-sectional areas defined by tabular data. | 04-07-2016 |
20160091016 | THRUST BEARING ASSEMBLY - A hydrodynamic thrust bearing has an annular plate, a plurality of bearing foils, and a plurality of bumper foils. The annular plate has a first face and a second face opposite the first face. The bearing foils have an arcuate shape and are joined to the first face of the annular plate. The bumper foils have an arcuate and corrugated shape and are joined to the second face of the annular plate. A method of making a hydrodynamic thrust bearing includes joining the bearing and bumper foils to the annular plate with integrally-formed spacers in which each bumper foil corresponds to a bearing foil. | 03-31-2016 |
20160076554 | BACKING PLATE - An annular backing plate for a diffuser in a centrifugal compressor comprises an inner diameter and an outer diameter disposed radially opposite the inner diameter. The backing plate also includes a first surface extending between the inner diameter and the outer diameter of the backing plate. A step is formed on the first surface proximate the inner diameter, wherein the step shifts a portion of the first surface encompassed by the step axially aft relative a portion of the first surface not encompassed by the step. | 03-17-2016 |
20160056737 | REDUCTION TECHNIQUE FOR PERMANENT MAGNET MOTOR HIGH FREQUENCY LOSS - A system including a motor loss reducing controller system utilizing input band-shifting, an integral control architecture and inverse band-shifting is disclosed. The motor loss reducing controller system may provide correction of harmonic currents flowing to a PM motor from a motor controller. The compensation is added to the PWM voltage command signals. Within a compensator, d-axis and q-axis current feedback signals are frequency shifted down by n times the fundamental frequency. This converts the initial motor stationary harmonic currents into DC values. The frequency shifting is completed by multiplying the feedback signal by sine and cosine carrier signals of the shifted frequency. An integral controller may cancel any component of error at a desired DC value. An inverse frequency-shift transformation is applied to the output of the I controller in order to shift the command output signal back to the original reference frame. | 02-25-2016 |
20160049380 | WIRE BONDS FOR ELECTRONICS - A circuit element includes a semiconductor chip and a wire for connecting between the semiconductor chip and an additional circuit element. A plurality of wire bond connections electrically connect the wire and the semiconductor chip. The plurality of wire bond connections can be disposed on a surface of the semiconductor chip and on a surface of the wire. | 02-18-2016 |
20160047358 | TURBINE NOZZLE WITH RELIEF CUT - A turbine nozzle for an air cycle machine includes a disk having a central axis and a plurality of airfoils extending from a surface of the disk. The plurality of airfoils is arranged radially about the disk section to direct a flow of a fluid passing thereby. A relief cut adjacent the airfoils, wherein the relief cut provides a channel in a least a portion of the surface of the disk. | 02-18-2016 |
20160043023 | SYSTEM AND METHOD FOR METAL MATRIX MOUNTING SCHEME - An integrated circuit assembly element formed via an additive manufacturing technique, such as mixing a conductive material with a memory metal to form a portion of a substrate in desired locations, such as along the footprint of die, are discussed herein. In operation (e.g. in response to thermal cycling of the assembly) the memory metal contracts while the conductive material expands. The result is an element having reduced thermal expansion, which can be net zero coefficient of thermal expansion and/or be catered to the coefficient of thermal expansion of a desired material, such as the silicon die. | 02-11-2016 |
20160040599 | COMBUSTION SYSTEM, APPARATUS AND METHOD - Combustion systems for a gas turbine engines are provided. The combustion system is configured to provide a fuel-air mist to achieve light-off during high altitude start (e.g., at altitudes greater than 45,000 ft.) without flame out. The combustion system may also be configured to provide additional air to the combustion chamber at high altitude to facilitate flame propagation and second stage burn. | 02-11-2016 |
20160032841 | ENVIRONMENTAL CONTROL GENERATOR SYSTEM AND APPARATUS - An environmental control power generation system is provided. The system may include a turbine and a generator. The system may be configured to provide air form a high pressure bleed port and/or a low pressure bleed port to the turbine. The turbine may be configured to reduce the pressure of the supplied air and generate power through the generator. The power may be supplied to an aircraft power distribution system. | 02-04-2016 |
20160023773 | HYBRID ELECTRIC PULSED-POWER PROPULSION SYSTEM FOR AIRCRAFT - A propulsion system has a gas turbine engine optimized to operate at a single operating condition corresponding to a maximum continuous power output of the gas turbine engine, an electric motor system, an electric machine rotatably attached to the gas turbine engine and electrically connected to the electric motor system, and an energy storage system having bi-directional electrical connections with the electric motor system and the electric machine. A method of operating the propulsion system including operating the gas turbine engine for a first period of time to provide electric power to the electric motor system and to recharge the energy storage system, turning off the gas turbine for a second period of time, and discharging the energy storage system to operate the electric motor system during the second period of time. | 01-28-2016 |
20160018374 | BELL CAP AEROSOL ADAPTOR - A method of testing an air sample and/or testing equipment may comprise introducing aerosolized sample particles into an air flow to create sample air upstream from an air quality sampling device. The method may include introducing the sample air to an offset sample inlet of a bell cap inlet adaptor coupled to a sample tube. The method may include merging at least a portion of the introduced sample air with axially flowing air with little to no turbulence based on the geometry of the bell cap inlet adaptor and/or a containment cavity. The method may include introducing at least a portion of the sample air into the sample tube. Next, a test of at least one of the quality of the sample air and/or the functionality of the bell cap inlet may be performed. | 01-21-2016 |
20160007473 | METHOD FOR FABRICATING PRINTED ELECTRONICS - A method for fabricating printed electronics and optical components includes printing a trace of electrically conductive, semiconductive or insulating material on a substrate and shrinking the substrate to a target size. The material can include an ink, solution, dispersion, powder, slurry, paste or the like. The step of shrinking can include heating the substrate at a predetermined temperature based on properties of the substrate. The step of shrinking can also include heating the substrate for a predetermined duration based on properties of the substrate. The step of shrinking can also include releasing an external electrical potential used to stretch the substrate during printing. For example, the substrate may decrease in area by at least fifty percent during heating. | 01-07-2016 |
20160007462 | METHOD FOR MANUFACTURING LAYERED ELECTRONIC DEVICES - A method for fabricating printed electronics includes printing a trace of an electrical component on a first substrate to form a first layer. The method further includes printing a trace of an electrical component on at least one additional substrate to form at least one additional layer. The first layer is stacked with the at least one additional layer to create an assembled electrical device. At least one of the layers is modified after printing. | 01-07-2016 |
20160003371 | PNEUMATIC PORT SHIELD - A port shield for a pneumatic actuator with a casing wall includes a sheet and a connecting member. The sheet includes an outer face disposed opposite an inner face, a first end disposed opposite a second end, and a first edge disposed opposite a second edge. The sheet also includes a bend formed in the sheet between the first edge and the second edge, wherein the bend extends from the first end to the second end and forms an apex on the outer face of the sheet. The connecting member extends from the sheet and is configured to connect the sheet to an outer side of the casing wall of the pneumatic actuator. | 01-07-2016 |
20150370274 | POWER DELIVERY SYSTEM WITH MITIGATION FOR RADIATION INDUCED SINGLE EVENT LATCH-UP IN MICROELECTRONIC DEVICES - A power delivery system includes a programmable current limit switch circuit connected between a power supply and electronic control circuits that are susceptible to single event latch-up. The programmable current limit switch is connected in a power bus between the power supply and the electronic control circuits. The programmable current limit switch circuit removes power from the electronic control circuits when an over-current condition persists for a blank time period, and restores power to the electronic control circuits after a retry time period. | 12-24-2015 |
20150363329 | MEMORY ADDRESS TRANSLATION - In one example, a device includes at least one processor, a transceiver configured to send and receive data, and at least one memory device. The at least one memory device includes a range of physical memory addresses divided into a plurality of physical memory partitions that each includes a sub-range of the range of physical memory addresses and corresponds to a range of virtual memory addresses. Instructions encoded in the at least one memory device cause the at least one processor to receive a memory address request configured to request access to a requested physical memory address within the range of physical memory addresses, determine that the requested physical memory address is associated with one of the plurality of physical memory partitions, determine a virtual memory address corresponding to the requested physical memory address, and access the requested physical memory address via the determined virtual memory address. | 12-17-2015 |
20150357930 | SYSTEMS AND METHODS FOR CONTROLLING ACTIVE RECTIFIERS - A method of controlling a rectifier includes receiving a gain factor, receiving a ramp interval, and generating a rectifier switch control voltage. The rectifier switch control voltage is an over-modulated rectifier switch control voltage generated by a pulse width modulator using the gain factor. The amount of over-modulation in the rectifier switch control voltage is decreased during the ramp interval for reducing transient voltage overshoot events at the start of active rectification. | 12-10-2015 |
20150357800 | THREE-DIMENSIONAL POWER DISTRIBUTION INTERCONNECT STRUCTURE - An electrical power distribution system for a mobile platform, and a method for making such, includes a forming a substrate having a first panel connected to a second panel. The first panel resides in a first plane that differs from a second plan in which the second panel resides. One or more bus bars are arranged on the first panel, with one or more power electronic devices arranged on the first panel and connected to the one or more bus bars. One or more connectors are arranged on the second panel and electrically connected to the one or more bus bars. Finally, one or more thermal relief devices are arranged in contact with the substrate. | 12-10-2015 |
20150352661 | ULTRASONIC ADDITIVE MANUFACTURING ASSEMBLY AND METHOD - In one aspect, an assembly is provided. The assembly includes a substrate having a top surface and an inner wall, the inner wall defining a cavity, and at least one metal foil layer ultrasonically welded to the substrate top surface using an ultrasonic additive manufacturing process. The at least one metal foil layer extends across the cavity to define a passage, and the at least one metal foil layer is substantially planar and is parallel to the substrate top surface. | 12-10-2015 |
20150349694 | LIGHT WEIGHT FILTER WITH DC COMMON MODE INDUCTOR FOR ELECTRIC AIRCRAFT MOTOR CONTROLLER - A motor controller has a direct current input, inverter, common mode filter, differential mode filter, and an output terminal. The direct current input is electrically connected to the common mode filter. The common mode filter is electrically connected to the inverter. The inverter is electrically connected in to the differential mode filter. The differential mode filter is electrically connected to the output terminal. The common mode filter is configured to attenuate common mode noise and is located on the input side of the inverter. The differential mode filter attenuates differential mode noise and is located on the output side of the inverter. A motor system having a motor controller, a direct current source, a feeder cable, and an electric motor. | 12-03-2015 |
20150349662 | PULSE-WIDTH MODULATION CONTROL OF PARALLELED INVERTERS - A system includes a paralleled inverter circuit and a controller. The paralleled inverter circuit includes a first inverter and a second inverter. The controller is configured to control a first plurality of switches of the first inverter and a second plurality of switches of the second inverter based upon a control vector. The controller controls the paralleled inverter circuit using a first unit vector for a first time period and controls the paralleled inverter circuit using a second unit vector for a second time period. The first unit vector and the second unit vector are selected based upon the control vector, and the first time period and the second time period are determined based upon the control vector. | 12-03-2015 |
20150349660 | SOLID-STATE INVERTERS WITH VOLTAGE-BALANCED SWITCHES - A phase leg for a multilevel inverter includes a positive DC lead, a first outer MOSFET connected to the positive DC lead, a first inner IGBT connected to the first outer MOSFET, a second inner IGBT connected to the first inner IGBT, and a second outer IGBT connected to the second inner IGBT. The first and second outer MOSFETs are superjunction MOSFETs voltage balanced by the first and second IGBTs for reducing voltage stress in the solid-state switch phase leg when the superjunction MOSFET and the IGBT are conducting current from the DC lead to the AC lead. | 12-03-2015 |
20150349658 | REGULATED AC-DC HYBRID RECTIFIER - A regulated hybrid AC-DC rectifier employing a boost stage is disclosed herein. The regulated hybrid AC-DC rectifier comprises a 12 pulse inductive current splitter/merger (CSM) system coupled to a boost stage. The boost stage may be regulated using a PWM controller. The regulated hybrid AC-DC rectifier may further include a three phase input filter configured to regulate the harmonic content of the AC-DC hybrid converter within a desired limit. The regulated hybrid AC-DC rectifier may further comprise a notch filter system configured to tune out harmonic ripples at known intervals, such as 11 | 12-03-2015 |
20150349626 | OUTPUT FILTER FOR PARALLELED INVERTER - A power conversion system includes a paralleled inverter and a plurality of coupling inductors. The paralleled inverter is configured to convert a direct current input into an alternating current output and includes a first inverter having a first plurality of phase outputs and a second inverter having a second plurality of phase outputs, which may achieve negligible common-mode output voltage. The plurality of coupling inductors connect one of the first plurality of phase outputs with one of the second phase outputs to filter differential-mode electromagnetic interference and circulation current. | 12-03-2015 |
20150349598 | MULTIPLEX WINDING SYNCHRONOUS GENERATOR - A multiplex winding synchronous generator includes a stator core with a plurality of winding slots; and power coils being distributed in each of the winding slots that are configured to supply multi-phase alternating current (AC) power. Also, the stator core includes at least two sets of power coils being distributed in the slots. | 12-03-2015 |
20150349356 | HYBRID EMERGENCY POWER UNIT SYSTEM - An integrated hybrid emergency power system having various features is disclosed. A hybrid emergency power system may have an auxiliary power unit and an emergency power unit. The emergency power unit may have a fuel cell. The auxiliary power unit may have an engine. The emergency power unit may be connected to the auxiliary power unit by an emergency power unit efficiency improvement apparatus. In this manner, the operating efficiency of the emergency power unit may be enhanced. | 12-03-2015 |
20150348728 | METHOD OF REDUNDANT MONITORING AND PROTECTION OF AC POWER GENERATION CHANNELS - A power quality control circuit is connected to monitor an AC input power and selectively connect the AC input power through a contactor. The power quality control circuit includes power quality monitor circuitry that determines whether the AC input power has an overfrequency condition, an underfrequency condition, an overvoltage condition or an undervoltage condition, and prevents closing of the contactor in response to a determination of any of those conditions. | 12-03-2015 |
20150348721 | REMOTE SWITCH CONTACT QUALITY MAINTENANCE - A system for maintaining integrity of a switch contact includes a first resistor-capacitor circuit, a second resistor-capacitor circuit, and a control switch. The first resistor-capacitor circuit is connected to an output of the switch contact and includes a first resistor and a first capacitor. Upon closing of the switch contact, a first wetting current flows through the switch contact. The second resistor-capacitor circuit includes a second resistor and a second capacitor. The control switch is connected between the output of the switch contact and the second resistor-capacitor circuit and is selectively closable to generate a second wetting current through the switch contact. The control switch may be operated as needed to maintain the integrity of the mechanical switch contact. | 12-03-2015 |
20150347127 | METHOD AND SYSTEM FOR IMPLEMENTING SOFTWARE REQUIREMENTS - A method for incorporating a set of requirements into an executable program to be run on an airborne system is provided. The method obtains the set of requirements for the program in a first format. The method uses a first tool to convert the set of requirements in the first format into a second format utilizing a markup language. The method uses a second tool to convert the set of requirements in the second format into a third format that influences a behavior of the program without changing the program. The method uses a third tool to determine whether the set of requirements in the third format incorporates all of the set of requirements in the second format in order to verify the program under a compliance standard for the airborne system without performing a verification process directly on the program. | 12-03-2015 |
20150346255 | METHOD OF DETECTION AND ISOLATION OF FAULTS WITHIN POWER CONVERSION AND DISTRIBUTION SYSTEMS - A power conversion and distribution system detects faults by monitoring differential current and differential power at certain locations in the system. Current loss faults are detected based on the monitored differential current, and series arc faults are detected based on the monitored differential power. A system controller may make the fault determinations and disable a power converter circuit of the power conversion and distribution system in response to detection of a fault. | 12-03-2015 |
20150346035 | FLEXIBLE LAMINATED THERMOCOUPLE - A flexible laminated thermocouple is provided and includes layers of insulation material. At least one of the layers has a longitudinal axis and includes thermocouple conductors formed of differing electrically conductive materials. Each of the thermocouple conductors includes a main section extending along the longitudinal axis and a flange extending transversely to the longitudinal axis. The main sections are insulated from one another and the thermocouple conductors are insulated from thermocouple conductors of another layer. | 12-03-2015 |
20150345606 | HARMONIC DRIVE ASSEMBLY WITH SELECTIVE DISCONNECT AND RECONNECT - A selectively disconnectable and reconnectable harmonic drive assembly of a rotary actuator is provided. The drive assembly includes a harmonic wave generator configured to rotate and disconnect and reconnect a harmonic drive of the actuator by moving radially inward to allow the disconnect of a flex spline from a ring gear and radially outward to allow the reconnect of the flex spline to the ring gear. With respect to the disconnect, roller bearings and a disconnect spring are configured to push the wave generator axially when a solenoid is activated, allowing the roller bearings to move radially inward. This movement releases an outward force on the flex spline, disconnecting the flex spline from the ring gear. The solenoid is deactivated so that a ball-lock sleeve is forced axially by a ball-lock-sleeve-return spring, and ball bearings are forced radially into a groove in a locked “disconnect” position. | 12-03-2015 |
20150345506 | COVER PLATE FOR CABIN AIR COMPRESSOR - A cover plate for use in a cabin air compressor is a generally cylindrical body with 19 holes extending through the body and an inner bore defining an inner diameter centered on a center axis. The body has a thickness in a dimension measured perpendicular to the central axis. The inner diameter is 14.840 inches (37.693 centimeters) plus/minus .005 inch (0.013 centimeter). A diffusor housing, a cabin air compressor and a method of replacing a cover plate are also disclosed. | 12-03-2015 |
20150344152 | AIRCRAFT EXTERNAL DC POWER VOLTAGE PROTECTION - An external power supply system for an aircraft includes a power receptacle configured to connect to an external power source to provide external power, a power switch operative to switch between a battery power source and the external power source, and a voltage check system configured to prevent at least one of under-voltage or over-voltage of an aircraft electrical system. The voltage check system includes a voltage relay sensor configured to determine if the external power is within a suitable voltage range and a check switch operatively connected to the voltage relay sensor, wherein if the external power is within a suitable voltage range, the voltage relay sensor activates the check switch to allow external power to the aircraft electrical system, and wherein if the external power is outside the suitable voltage range, then the voltage relay sensor does not allow power to the aircraft electrical system. | 12-03-2015 |
20150343911 | POWER CONVERTERS - A power converter includes a first set of transistors electrically connected in series, a second set of transistors electrically connected in series, and an AC link. The second set of transistors is electrically connected in parallel with the first set of transistors to form an H-bridge. The AC link is electrically connected between the first and second sets of transistors. A plurality of H-bridges are connected in parallel and a three-wire DC bus is electrically connected to the H-bridges. | 12-03-2015 |
20150340973 | BRAKE CONTROLLER - A system and method for controlling a brake coil in a motor having a control processor and a controller in communication with the control processor, the controller comprising a processor and memory with instructions stored thereon when executed by the processor cause the controller to receive signals indicative of threshold current values for the brake coil; provide enabling signals to each of a high-side and low-side driver circuit; receive signals indicative of a sensed current in the brake coil; compare the sensed current with the threshold current values; and provide an adjustment signal if the sensed current is outside a known range of values for the threshold current values. | 11-26-2015 |
20150339181 | DIGITAL INFORMATION TRANSFER SYSTEM INCLUDING FAULT PROTECTION - A digital information transfer system includes an electronic driver unit in electrical communication with a power supply to receive an input voltage. The driver converts the input data into output data based on a digital information transfer system protocol. An electronic fault detection is configured to determine a fault condition of the at least one output transmission line based on a comparison between a voltage level of the at least one output transmission line and the input voltage. An electronic fault protection module is in electrical communication with each of the driver unit, the at least one output transmission line and the fault detection module. The electronic fault protection module is configured to selectively disconnect the driver unit from the at least one output transmission line in response to detecting the fault condition. | 11-26-2015 |
20150338857 | PRESSURE-REGULATING VALVES - A pressure-regulating valve includes a valve sleeve with first and second ends defining a longitudinal axis, a sense line, a sense piston, a main chamber, and first and second valve spools. The sleeve includes an axially aligned bore. The sense line is within the bore proximate the first end. The sense piston is within the bore between the sense line and the second end, and is configured to move along the longitudinal axis in response to pressure exerted by fluid in the sense line. The main chamber is within the bore between the sense piston and the second end, and includes supply and vent ports. The first valve spool is within the bore between the sense piston and the second end. The second valve spool is within the bore between the first valve spool and the second end. | 11-26-2015 |
20150332881 | ELECTROMECHANICAL FUSE FOR DIFFERENTIAL MOTION SENSING - An electromechanical fuse of a differential motion sensor is provided. The fuse includes at least one thick layer that acts as an insulating envelope of the fuse. A thin layer acts as a conductor of the fuse and is made of a lower-strength material. | 11-19-2015 |
20150331026 | FREQUENCY DETECTION CIRCUITS - A frequency monitoring circuit includes a monitoring lead, a D-type flip-flop, and a one-shot. The D-type flip-flop has a switchable logic state, a clear input, and a clock input. The one-shot has an input and an output connected to the D-type flip-flop clear input. The monitoring lead connects the one-shot input to the latch clock input for switching the logic state of the D-type flip-flop based on change in voltage applied to the monitoring lead. | 11-19-2015 |
20150330521 | CONTAMINATION RESISTANT CARTRIDGE VALVE - In one aspect, a pressure regulating valve assembly is provided. The valve assembly includes a housing having a fluid inlet and a fluid outlet, a sleeve positioned within the housing, and a spool at least partially positioned within the sleeve. The spool includes an outer surface having a shoulder, and the spool is configured to translate within the sleeve between a closed position and an open position. The valve assembly further includes a cap coupled to the sleeve and surrounding at least a portion of the spool, and the cap includes an inner surface with a flange extending therefrom. In the closed position the spool shoulder abuts against the cap flange to define a sealed metering edge. In the open position the spool shoulder is spaced from the cap flange to unseal the metering edge and define a metering window to facilitate fluid flow therethrough to the fluid outlet. | 11-19-2015 |
20150330331 | RAM AIR TURBINE DRIVESHAFT GEAR AND BEARING ARRANGEMENT - A ram air turbine is presented that includes a turbine having a blade and a turbine shaft, a strut removably coupled to the turbine, wherein the strut has a gearbox section and a drive section, a turbine shaft with a bevel gear oriented perpendicularly to the turbine shaft and positioned within the gearbox section of the strut, a driveshaft coupled to the generator and positioned within the drive section of the strut, and a pinion gear that engages with the bevel gear, wherein the pinion gear is secured to the driveshaft by a spanner nut, wherein the pinion gear utilizes a key configured to interact with the keyed joint of the driveshaft. The pinion gear is supported by a pinion bearing that may be press fit onto the pinion gear and by one of the generator bearings. | 11-19-2015 |
20150330311 | FUEL METERING VALVE AND METHOD OF MANAGING FUEL IN A METERING VALVE - A fuel metering valve includes a main flow path extending axially between an inlet and an outlet. Also included is a plunger disposed around a portion of a plunger guide, the plunger and the plunger guide configured to translate between an open position and a closed position to selectively distribute a fuel flowing through the main flow path to the outlet of the fuel metering valve. Further included is a solenoid coil disposed between a solenoid outer body and a solenoid inner body, the solenoid coil configured to magnetically attract the plunger to the open position. Yet further included is a secondary flow path for routing a stagnant volume of fuel upon translation of the plunger from the closed position to the open position. | 11-19-2015 |
20150329215 | RAM AIR TURBINE GENERATOR ASSEMBLIES - A ram air turbine having a turbine with one or more blades, a strut having a drive section and a generator adapter section, a turbine shaft and bevel gear located within the drive section, a generator positioned within the generator adapter section of the strut and comprising an exciter and permanent magnet generator in the a turbine side, and a driveshaft having a pinion gear that engages with the bevel gear, wherein the driveshaft is removably coupled to the generator. The strut includes a cone positioned between the drive section and the generator adapter section, and the permanent magnet generator and the exciter are positioned inside of the cone of the strut. The generator utilizes a generator cover and a generator bearing, and the bearing engages with the driveshaft and the generator. The permanent magnet generator and the exciter are positioned within the cone of the generator cover. | 11-19-2015 |
20150329214 | RAM AIR TURBINE GEARBOX SEALING - A ram air turbine includes a turbine with one or more blades, a strut removably coupled to the turbine and having a gearbox section and a drive section, a cover located at an end of the gearbox section of the strut with a test plug having a static seal, a turbine shaft and a bevel gear located in the gearbox section of the strut and a driveshaft and a pinion gear located in the drive section of the strut, wherein the pinion gear engages with the bevel gear. The turbine shaft may include a dynamic seal that provides sealing between the turbine shaft and the cover. The test plug may be a threaded plug. The cover may also utilize a dynamic seal. The turbine shaft may include a splined internal cavity for use with a ground test motor. | 11-19-2015 |
20150329213 | INTEGRAL RAM AIR TURBINE STRUT AND GEARBOX - A ram air turbine is provided that utilizes a one-piece strut. The strut includes an integral gearbox section and an integral drive section. Within the strut, a turbine shaft and a bevel gear engages a driveshaft and a pinion gear, which transfers rotation from the turbine to a generator. The strut may be machined from a single piece of metal, such as aluminum. | 11-19-2015 |
20150318103 | HYBRID PLANAR COMMON-MODE CHOKE - A common-mode choke includes a plurality of hybrid core inductors and a printed circuit board. Each of the plurality of hybrid core inductors includes a first core made of a first material, a second core made of a second material, and at least one common coil configured to generate a magnetic field in both the first and second cores. The printed circuit board is configured to connect the plurality of hybrid core inductors in series. | 11-05-2015 |
20150308878 | STARTER OIL QUANTITY INDICATION SYSTEM - A starter can be configured for use with a turbomachine and includes a housing defining a cavity, wherein the cavity is configured to hold a quantity of starter oil, and a temperature sensor disposed within the cavity and configured to sense a temperature within the housing. A system includes a starter for a turbomachine as described herein and a computing apparatus configured to receive signals from the temperature sensor and to determine if the temperature within the housing indicates a sufficient quantity of starter oil. A method for determining oil quantity in a starter includes receiving a temperature signal from a temperature sensor disposed within the starter, determining an oil temperature within the starter based on comparing the temperature signal, and determining if a sufficient amount of oil is present in the starter based on comparing predetermined temperature operational values to the oil temperature. | 10-29-2015 |
20150308460 | INLET TUBE DESIGN - A ram air fan assembly includes an outer housing. An inner housing is located within the outer housing. A motor is attached to the inner housing. An inlet tube extends between the outer housing and the motor. The inlet tube includes a straight first portion and a curved second portion. At least one of the two portions includes a perforated portion. | 10-29-2015 |
20150308373 | METHOD OF SCHEDULING PRESSURE IN VARIABLE PRESSURE ACTUATION SYSTEMS - In one aspect, a variable pressure actuation system is provided. The variable pressure actuation system includes an actuator configured to control a variable geometry device, and a fluid line fluidly coupled to the actuator. The fluid line is configured to supply a pressurized fluid to the actuator to facilitate controlling the variable geometry device. The system further includes a load feedback device coupled to the actuator, the load feedback device configured to measure a load placed on the actuator by the variable geometry device. | 10-29-2015 |
20150308283 | TURBOMACHINE STARTER OIL FILTRATION SYSTEM - A starter configured for use with a turbomachine includes a housing defining a cavity, a transmission operative to convert an airflow into rotational motion for starting an engine, wherein the cavity is configured to hold a quantity of starter oil for lubricating at least a portion of the transmission, and an oil filter disposed in fluid communication with the starter oil. | 10-29-2015 |
20150295251 | ADDITIVE MANUFACTURING FOR FUEL CELL FLOW FIELDS - A plate for a fuel cell includes a first plate body defining a first flow field channel in a first surface thereof. The first flow field channel has a cross-sectional area that varies as a function of depth from the first surface of the plate body toward an opposed second surface. The cross-sectional area can increase and/or decrease from the first surface toward the opposed second surface. | 10-15-2015 |
20150288315 | SYSTEMS UTIILIZING A CONTROLLABLE VOLTAGE AC GENERATOR SYSTEM - An electrical system for a motorized system can include a controllable voltage AC generator configured to be connected to a power generation unit shaft and configured to convert rotational energy to electrical energy, wherein the controllable voltage AC generator is configured to output a desired voltage irrespective of a change in a rotational speed of the controllable voltage AC generator, and an AC bus operative to connect the controllable voltage AC generator to an AC electrical device. | 10-08-2015 |
20150288309 | SYSTEMS UTILIZING A CONTROLLABLE VOLTAGE AC GENERATOR SYSTEM - A rocket propelled vehicle includes a controllable voltage AC generator configured to be connected to a power generation turbine shaft and configured to convert rotational energy to electrical energy, wherein the controllable voltage AC generator is configured to output a desired voltage irrespective of a change in a rotational speed of the power generation turbine shaft, an AC electric motor pump configured to pump at least one of fuel or oxidizer to a combustion chamber of the rocket propelled vehicle, and an AC bus connecting the controllable voltage AC generator to each of the AC electric motor pump. | 10-08-2015 |
20150288037 | INSULATING LIQUID IMMERSED BATTERY - A multi-cell battery pack may be designed to serve as a thermosiphon. Stated another way, multi-cell battery pack may be designed to incorporate a passive heat exchange technique based on natural convection, which circulates a substance (liquid, or gas such as air) without the necessity of a mechanical pump. In this way, insulating fluid in cavities between cells greatly enhances the likelihood of preventing a thermal runaway condition. The insulating fluid in cavities between cells may result in reduced arcing and the elimination of combustion within a battery housing. | 10-08-2015 |
20150287657 | SOLID-STATE STACKED DIE CONTACTORS - A solid-state contactor includes a housing, a lead, a bus plate, and an end connector. The lead extends through the housing and into an interior of the housing. The bus plate is disposed within the housing interior and mounts a die which is electrically connected to the lead through the bus plate. The end connector extends between the bus plate and the lead, attaching to the bus plate at an angle for coupling a plurality of bus plates with die to the lead in a stacked arrangement. | 10-08-2015 |
20150286228 | SATURATION CONTROL OF MAGNETIC CORES OF BIDIRECTIONAL DEVICES - A system for controlling saturation of a magnetic core of a transformer includes a transformer control circuit, a Hall sensor, and a processor. The transformer control circuit is configured to provide cycles of bidirectional excitation to the transformer at a first frequency and a first duty cycle. The Hall sensor is configured to output a first field value of the magnetic core during a first half-cycle of each of the cycles of bidirectional excitation and a second field value during a second half-cycle of each of the cycles of bidirectional excitation. The processor is configured to increase the first duty cycle to a second duty cycle in response to a magnitude of the first field value exceeding a first threshold magnitude. The processor is further configured to increase the first frequency to a second frequency in response to both the magnitude of the first field value exceeding the first threshold magnitude and the magnitude of the second field value exceeding a second threshold magnitude. | 10-08-2015 |
20150285391 | HIGH PRESSURE RELIEF VALVE FLOW DISRUPTOR - In one aspect, a fluid flow disruptor is provided. The fluid flow disruptor includes a base flange having an outer diameter and an inner diameter, the base flange configured to couple to a valve, and a cap extending from the base flange. The cap includes a proximal end coupled to the base flange about the inner diameter, a distal end, and a sidewall extending between the proximal end and the distal end. At least one aperture is formed in the sidewall, and the fluid flow disruptor is configured to direct a fluid flowing in an axial direction to flow around the cap distal end, through the at least one aperture, and through the base flange inner diameter into the valve, to thereby increase a turbulence of the fluid to decrease an axial momentum load of the fluid acting on the valve. | 10-08-2015 |
20150285087 | TURBOMACHINE BLADE CLEARANCE CONTROL SYSTEM - A turbomachine blade clearance system includes an actuator including an actuating portion that can be fixed to an interior surface of a turbomachine housing and a shaft for actuating movement relative to the turbomachine housing, a turbomachine blade seal operatively connected to the shaft of the actuator and configured to move relative to the turbomachine housing to adjust a distance from a turbomachine blade of a turbomachine to maintain a predetermined gap clearance between the blade seal and the blade, a waveguide disposed within the shaft, and at least one antenna disposed in electromagnetic communication with the waveguide such that a signal from the antenna can be directed by the waveguide. | 10-08-2015 |
20150283908 | SYSTEMS UTILIZING A CONTROLLABLE VOLTAGE AC GENERATOR SYSTEM - An aircraft taxi system includes a controllable voltage AC generator configured to be connected to a power generation turbine shaft and configured to convert rotational energy to electrical energy, wherein the controllable voltage AC generator is configured to output a desired voltage irrespective of a change in a rotational speed of the power generation turbine shaft, an AC electric motor configured to motor at least one of fuel or oxidizer to a combustion chamber of the aircraft, and an AC bus connecting the controllable voltage AC generator to each of the AC electric motors. | 10-08-2015 |
20150280595 | SWITCH CONFIGURATION FOR A MATRIX CONVERTOR - A power conversion system includes a power source, a matrix converter, and a controller. The power source is configured to produce an input power. The matrix converter is configured to convert the input power to output power and includes a plurality of normally-on switches and a plurality of normally-off switches. The controller is configured to control the plurality of normally-on switches and the plurality of normally-off switches to control the output power. The plurality of normally-on switches provide the input power directly as the output power when the controller is inactive. | 10-01-2015 |
20150280528 | SPEED DETECTION CIRCUITS FOR PERMANENT MAGNET ALTERNATORS - A permanent magnet alternator (PMA) includes a rotatable shaft, windings, a shunt regulator circuit, and a speed detection circuit. The rotatable shaft is connected electromagnetically to the windings. The shunt regulator circuit is electrically connected to the windings. A current sense transformer with a primary coil is electrically connected to the shunt regulator circuit. A secondary coil is electrically connected to a comparator circuit with reference voltage and generates voltage pulse indicating PMA speed. The voltage pulses form an output corresponding to and indicative of rotation speed of the shaft suitable for processing by a processor to present a PMA speed indication for use in the overall system architecture as a measurement parameter. | 10-01-2015 |
20150280513 | MOTOR HOUSING - A motor housing includes a central body having a central cavity region configured to receive an electric motor. Also included is a first end portion having a first inner surface that defines a first internal cavity region configured to receive a first end winding of a stator of the electric motor, wherein the first internal cavity region comprises a first radius defined by a distance from a main axis of the motor housing to the first inner surface. Further included is a second end portion having a second inner surface that defines a second internal cavity region configured to receive a second end winding of the stator, wherein a ratio of the first radius to a first end portion wall thickness ranges from 19.89 to 27.85. | 10-01-2015 |
20150280422 | FAULT PROTECTION OF A VOLTAGE DIFFERENTIAL TRANSFORMER (VDT) EXCITATION CIRCUIT - An excitation circuit includes an operational amplifier, a transistor circuit, a switch, and a pull-down resistor. The operational amplifier receives an excitation input voltage at a non-inverting input and provides an operational amplifier output. The transistor circuit receives the operational amplifier output and provides a transistor circuit output. The transistor circuit output is connected to an inverting input of the operational amplifier. The switch is connected between the operational amplifier output and the transistor circuit. The switch is opened to disconnect the operational amplifier output from the transistor circuit. The pull-down resistor is connected between an output of the switch and ground, wherein the pull-down resistor turns off the transistor circuit when the analog switch is opened. | 10-01-2015 |
20150276560 | CHEMICAL DETECTOR - A chemical detector is provided and includes a chemical detector device and a chemical agent aerosol vaporizer assembly. The chemical agent aerosol vaporizer assembly includes a vaporizer fluidly interposed between an inlet and an outlet and is configured to receive via the inlet a chemical agent aerosol in the vaporizer wherein the chemical agent aerosol is smeared against a fluted surface that is passivated against adsorption and vaporized. The vaporized chemical agent aerosol is subsequently output to the chemical detector device via the outlet. | 10-01-2015 |
20150276331 | OUTLET HEADER OF HEAT EXCHANGER - An outlet header of a heat exchanger is provided. The outlet header defines a flow-tap-off duct and includes an L-tube. The L-tube defines first and second legs. The first leg is fasteningly installed in the flow-tap-off duct such that the second leg is directed toward a cold-cold corner of the heat exchanger. The second leg is configured to capture cool air from the cold-cold corner for providing the cool air to and through the flow-tap-off duct and exterior the heat exchanger. | 10-01-2015 |
20150276088 | PRESSURE REGULATING VALVE AND METHOD OF ADJUSTING DAMPING OF THE SAME - A pressure regulating valve includes a housing having a cavity therein with at least a first port, a second port and a third port in fluidic communication with the cavity, and a spool movable within the cavity. The spool separates the cavity into at least a first space and a second space, the first port and the second port are in alterable fluidic communication with the first space with movement of the spool altering a flow area connecting the first port with the second port. The third port connects to the second space through a variable flow area opening that is configured to alter a rate of movement of the spool. | 10-01-2015 |
20150275933 | VALVES WITH METERING SLEEVES - A valve includes a housing having an inlet and an outlet. A spool is fixed within the housing and defines a flow window therethrough for fluid communication between the inlet and the outlet. A piston is slidingly engaged in a piston compartment of the spool. A sleeve is slidingly engaged with the spool on an outer surface of the spool. The piston and sleeve are operatively connected for common motion along a sliding axis relative to the spool and housing between a first position in which the sleeve occludes the flow window to inhibit flow from the inlet to the outlet, and a second position in which the sleeve unoccludes the flow window to allow flow from the inlet to the outlet. | 10-01-2015 |
20150275910 | THRUST PLATE ASSEMBLY - An aspect is a thrust plate assembly for an air cycle machine. The thrust plate assembly includes an annular body defined by an outer rim and a main bore. The annular body includes a nozzle side and a thrust bearing side. The nozzle side includes a nozzle region proximate the outer rim and a turbine rotor region proximate the main bore, where the outer rim has an outer diameter. The thrust plate assembly also includes a main bore seal installed in the main bore. The main bore seal has an inner diameter, where a ratio of the outer diameter of the outer rim to the inner diameter of the main bore seal is between 3.94 and 3.96. | 10-01-2015 |
20150275770 | JET ENGINE ACTUATION SYSTEM - A jet engine actuation system includes a first ring gearbox, a second ring gearbox and an actuator. The first ring gearbox includes a first ring driveshaft coupled to a first portion of a synchronization ring included in a jet engine. The second ring gear box includes a second ring drive shaft coupled to a second portion of the synchronization ring. The actuator has a first actuator gearbox configured to generate a first rotational output and a second actuator gearbox configured to generate a second rotational output. A first drive shaft transfers the first rotational output to the first ring gearbox and a second drive shaft transfers the second rotational output to the second ring gearbox. The actuator simultaneously controls the first and second actuator gearboxes such that the first and second rotational outputs are simultaneously transferred to the first and second ring gearboxes to rotate the synchronization ring. | 10-01-2015 |
20150271957 | COOLING FLOW OPTIMIZATION - A remote power unit has an inlet duct and an outlet duct in a housing. The inlet and outlet ducts are configured to receive and expel cooling air from the remote power unit. A plurality of slots within the housing each hold a printed wiring board. A door is attached to each of the slots, and each door has a shape thermal memory element. The shape thermal memory element is used to open and close the doors to either allow or prevent cooling airflow from passing along the printed wiring board. In this way, cooling air use is reduced to only those areas where cooling is needed. | 09-24-2015 |
20150270794 | SOFT-START CONTROL FOR ELECTROMECHANICAL DEVICES USING A RESISTOR-CAPACITOR CIRCUIT - A system for controlling an electromechanical device includes a motor drive, a main controller, a voltage regulator and a resistor-capacitor circuit. The motor drive controls an electric motor of the electromechanical device. The main controller provides motor commands to control the motor drive that are provided by providing command voltage on at least one command line. The voltage regulator circuit receives the command voltage and provides a motor voltage to power the motor drive. A capacitor of the resistor-capacitor circuit is charged by the command voltage, and the motor voltage is controlled based upon charge of the capacitor. | 09-24-2015 |
20150267824 | CHECK VALVE WITH REDUCED OPENING SPEED - A check valve for a housing with adjacent first and second apertures separated by a septum comprises a hinge pin, a first flapper, and a second flapper. The hinge pin is located downstream of the septum. The first flapper is anchored via the hinge pin, and is rotatable about the hinge pin to block the first aperture when in a closed position. The second flapper is anchored via the hinge pin, and comprises a primary flapper section and a counterbalance section. The primary flapper section is rotatable about the hinge pin to block the second aperture when in a closed position. The counterbalance section extends upstream from and substantially parallel to the primary flapper section, towards the first aperture. | 09-24-2015 |
20150266572 | PROPELLER BLADE HAVING COMPLIANT SPAR CORE - A propeller blade includes a foam core formed of a combination of polyuria and polyvinyl chloride (pvc), an adhesive layer formed on the core and a structural layer that covers at least a portion of the adhesive layer and that surrounds at least a portion of the foam core. | 09-24-2015 |
20150260047 | RESISTIVE-INDUCTIVE PROPELLER BLADE DE-ICING SYSTEM INCLUDING CONTACTLESS POWER SUPPLY - An aircraft propeller de-icing system comprises at least one propeller blade coupled to a rotatable prop assembly. The prop assembly is configured to rotate in response to rotatably driving a propeller shaft. At least one resistive-inductive heating unit is coupled to the at least one propeller blade. The resistive-inductive heating unit is configured to generate eddy currents that induce inductive heat in response to an electric current. A contactless power transfer system generates the electrical current in response to transferring power across an air gap separating the propeller shaft from the contactless power transfer system. | 09-17-2015 |
20150252852 | OIL RETENTION AND DELIVERY SYSTEM FOR A BEARING - A bearing seal assembly of a rotary machine includes and inner shaft and an outer shaft. The outer shaft is disposed concentrically around and radially outward from the inner shaft. The space between the inner and outer shafts forms an annulus void. The inner shaft includes an oil inlet port through which lubricating oil enters the annulus void. A grooved structure is located on an inner surface of the outer shaft, and the grooved structure is configured to retain oil upon shutdown of the rotary machine. A bearing is located outside of the outer shaft. An oil outlet port is disposed in the outer shaft and is connected to the grooved structure for supplying lubricating oil to the bearing. | 09-10-2015 |
20150252815 | FLUID FILTRATION USING SPLINES - An assembly for filtering a fluid includes a first rotatable shaft with a first set of splines. The first rotatable shaft has an internal cavity containing the fluid. Also included is a second rotatable shaft with a second set of splines mated to the first set of splines. The second rotatable shaft includes at least a portion of a supply hole. The first rotatable shaft and the second rotatable shaft are configured to convey the fluid from the internal cavity through a tight clearance between the first set of splines and the second set of splines, to filter the fluid, and then out the supply hole. | 09-10-2015 |
20150247408 | FAN ROTOR WITH THICKENED BLADE ROOT - A fan rotor of an air cycle machine includes a hub with fan blades extending from the hub. Each of the plurality of fan blades includes a main airfoil portion located distally from the hub. The main airfoil portion generally has a uniform thickness along its span. A base portion located between the hub and the main airfoil portion of each of the fan blades has a chord length that is longer than a chord length of the main airfoil portion. | 09-03-2015 |
20150240960 | HIGH OPENING VELOCITY CHECK VALVE - A check valve housing is provided and includes a base having opposite sides which are configured to form linear contact surfaces with check valve flappers pivotably disposed on either side of the base, respectively, and an additional structural member having a continuous body and opposite sides which are configured to form additional contact surfaces with each of the check valve flappers, respectively, the check valve flappers being configured to form a lip extending beyond the additional structural member. | 08-27-2015 |
20150240841 | PRESSURE SWITCH FOR OIL SUPPLY - A pressure switch including a pressure chamber and a moving disc. The moving disc is moveable in response to a pressure in the pressure chamber to cause contact between a moveable contact and a fixed contact. An orifice communicates a fluid pressure into the pressure chamber. The orifice provides a tortuous path for a fluid flow to reach the pressure chamber. An oil supply system and a generator are also disclosed. | 08-27-2015 |
20150233480 | PRESSURE REGULATING VALVES FOR ELECTRICAL GENERATORS - A pressure regulating valve includes a valve body and a screen body. The screen body wraps around the valve body and joins itself at a screen joint for coupling the screen body to the valve body. A screen section defined on the screen body strains lubricant entering the valve body. | 08-20-2015 |
20150233386 | FIRST STAGE TURBINE HOUSING FOR AN AIR CYCLE MACHINE - A housing of an air cycle machine includes a static seal portion, a main bore housing portion, a shroud pilot housing portion, and a thrust plate housing portion. The static seal portion is arranged about a central axis and defines static seal radius D | 08-20-2015 |
20150233249 | PROPELLER BLADE AND METHOD - A propeller blade includes an inner spar structure surrounding an inner spar foam core. Also included is a leading edge foam structure disposed proximate a leading edge of the inner spar structure. Further included is a trailing edge foam structure disposed proximate a trailing edge of the inner spar structure. Yet further included is an outer spar structure surrounding the inner spar structure, the leading edge foam structure and the trailing edge foam structure. Also included is a blade shell, a leading edge foam core located between the outer spar structure and the blade shell, and a trailing edge foam core located between the outer spar structure and the blade shell. | 08-20-2015 |
20150232195 | RAM AIR TURBINE ACTUATOR - A component for use in a ram air turbine actuator includes a lock bolt extending along a centerline with the lock bolt being axially movable between a stowed position and a deployed position and a plurality of rollers that are radially outward from the centerline and guided by the lock bolt. The component also includes a slider radially between at least a portion of the lock bolt and a piston rod with the slider being axially movable between a stop position and the deployed position and up-lock wedges supported by the piston rod. The actuator becomes locked in the stowed position when the lock bolt and slider move axially within the piston rod and a cylinder to position the rollers to push the up-lock wedges radially outward into an aperture and prevent the lock bolt, slider, and cylinder from axial movement. | 08-20-2015 |
20150232194 | STALL RECOVERY SYSTEM FOR A RAM AIR TURBINE - In one aspect, a ram air turbine stall recovery system includes a ram air turbine, a hydraulic pump powered by the ram air turbine with the hydraulic pump having a pump inlet and a pump outlet, an electric generator powered by the ram air turbine, a bypass line that connects the pump outlet to the pump inlet, a bypass valve located on the bypass line between the pump outlet and the pump inlet; and a controller responsive to an input signal that indicates a potential stall condition of the ram air turbine. The controller causes the bypass valve to open to allow a hydraulic fluid to flow through the bypass line in order to reduce a pressure within the hydraulic pump. | 08-20-2015 |
20150228405 | ROTARY TRANSFORMERS FOR ELECTRICAL MACHINES - A rotary transformer includes a shaft, a stator, and a rotor. The stator has a pole surface extending about the shaft. The rotor has a pole surface and operatively connects to the shaft for common rotation with the shaft such that the pole surface of the rotor axially opposes the pole surface of the rotor at an overlap area. The overlap are between the pole surfaces is greater at a first rotor position that at a second rotor position for superimposing a signal indicative of rotor position on electrical power transferred between the stator and rotor. | 08-13-2015 |
20150213952 | MULTILAYER CAPACITOR WITH INTEGRATED BUSBAR - Embodiments are directed to obtaining a specification of at least one operational requirement for at least one capacitor, generating a design of the at least one capacitor to satisfy the at least one operational requirement, the design of the at least one capacitor comprising a plurality of layers and a first integrated busbar coupled to at least a portion of the layers, and based on the design, manufacturing the at least one capacitor by utilizing an additive manufacturing technique. | 07-30-2015 |
20150200769 | CROSS-CHANNEL DATA COMMUNICATION WITH DATA PHASE-LOCKED LOOP - A data communication system includes a unit that receives edge-encoded data from a data link. The unit includes a counter, a data bit reader, and a phase-locked loop. The counter counts at a sampling frequency between a minimum value and an end-count value. The data bit reader is connected to receive the edge-encoded data. The data bit reader samples the edge-encoded data at the sampling frequency to detect data bits of the edge-encoded data. The phase-locked loop updates the end-count value if consecutive bits of the data bits are detected prior to an expected iteration of the counter. The phase-locked loop also updates the end-count value if consecutive bits of the data bits are detected later than the expected iteration of the first counter. | 07-16-2015 |
20150194905 | UNIVERSAL AC TO DC CONVERTER - A universal AC to DC converter may be configured to convert alternating current (AC) to direct current (DC), such as for use in aerospace applications. The disclosure relates to a single universal power electronic converter capable of converting an AC input voltage, such as a line to neutral input voltage of either 115 Vrms or 230 Vrms nominal to 28 V DC. | 07-09-2015 |
20150194863 | GROUNDED RADIAL DIODE PACK - The present disclosure relates to generators and their components. Specifically, a grounded radial diode pack is disclosed herein. A design to accommodate safe dissipation static charge build-up is disclosed. Safe dissipation of accumulated charge involves the provision of a suitable electrical path that will allow charges to flow to ground. | 07-09-2015 |
20150194797 | HEAT SINK FOR CONTACTOR IN POWER DISTRIBUTION ASSEMBLY - An electrical contactor assembly is provided including an electrical bus bar and at least one electrical contactor. The electrical bus bar includes a layer of insulation, a layer of copper, and a composite core having at least one wire embedded therein. The wire is configured to locally reduce thermal strain. The at least one electrical contactor is mounted to the layer of copper through an opening in the layer of insulation. The electrical contactor and the bus bar are thermally and electrically connected. | 07-09-2015 |
20150194260 | ROLLED INDUCTOR WITH THERMAL POTTANT - A plurality of cores are arranged in a loop between an inner wall and an outer wall. A gap filler is arranged circumferentially between each of the plurality of cores. A high thermal conductivity potting material is arranged around both the inner and outer edges of the core segments. A winding wraps around each of the plurality of core segments. The windings may be embedded within the high thermal conductivity potting material. | 07-09-2015 |
20150192177 | Spline Lock Shaft Locking System - A coupling shaft assembly system is disclosed. A coupling shaft assembly system may have a coupling shaft spline lock body having spline lock spline teeth, a main coupling shaft body having input spline teeth, and a locking bolt, wherein the locking bolt retains the coupling shaft spline lock body in substantially fixed communication with the main coupling shaft body, wherein the coupling shaft spline lock body retains the coupling shaft assembly system in mechanical communication with a power shaft. In this manner, a coupling shaft assembly system may reduce the axial forces transferred by the coupling shaft assembly system. | 07-09-2015 |
20150192175 | Cage Bearing With Oil Retaining Shield - A bearing system may have an inner race coupled to an outer race defining a lubrication volume and a shield coupled to the outer race, the shield at least partially defining an aperture of the lubrication volume. The aperture may permit the flow of lubricating oil through the bearing system. The shield may retain a quantity of oil within the bearing system. The bearing system may be operated without an oil supply, for example, during an emergency, and the retained quantity of oil may provide ongoing lubrication. | 07-09-2015 |
20150184700 | DRIVE ASSEMBLY WITH SELECTIVE DISCONNECT - A drive assembly with selective disconnect includes a motor with a motor drive shaft; a harmonic drive coupled to one end of the motor drive shaft; an output shaft coupled to the harmonic drive; and a retracting mechanism that selectively retracts the motor drive shaft axially to decouple the motor drive shaft from the harmonic drive. | 07-02-2015 |
20150183523 | TAIL CONE DRIVEN EMERGENCY POWER GENERATING SYSTEM - A tail cone integrated ram air turbine (RAT) includes a rotatable segment of an aircraft tail cone configured to deploy a set of RAT blades. The tail cone integrated RAT also includes a power transfer shaft connected between the rotatable segment and configured to transfer power to from the rotatable segment to an auxiliary power unit (APU). The tail cone integrated RAT further includes a controller connected to the APU and configured to control power output from the APU. When emergency power for an aircraft is needed, the set of RAT blades is deployed from the rotatable segment of an aircraft tail cone. Mechanical power from the rotatable segment is transferred to an APU generator to produce emergency electrical power. | 07-02-2015 |
20150147664 | METHOD OF OPERATING A FUEL CELL IN CONFINED SPACE - A method of operating a fuel cell in a vehicle includes the steps of initially charging a waste tank with a gas that is readily absorbable in water. A supply of fuel is passed across one electrode in a fuel cell, and a supply of oxygen containing gas across another electrode generating water from operation of the fuel cell. The water is delivered into the tank. A vehicle is also disclosed. | 05-28-2015 |
20150147181 | DIFFERENTIAL BLADE DESIGN FOR PROPELLER NOISE REDUCTION - A propeller is provided including a hub and a first blade group and a second blade group. The first blade group includes at least one first propeller blade and the second blade group includes at least one second propeller blade. The at least one first propeller blade and the at least one second propeller blade are mounted to and equidistantly spaced about the hub. The at least one first propeller blade of the first blade group has at least one geometric characteristic different from the at least one propeller blade of the second blade group. The different blade groups will generate different noise signatures over a wider range of frequencies allowing for the design of low noise propeller systems. | 05-28-2015 |
20150145461 | INPUT EMI FILTER FOR MOTOR DRIVE INCLUDING AN ACTIVE RECTIFIER - A poly-phase motor drive includes an input EMI filter having a poly-phase filter input and a poly-phase filter output and an active rectifier connected to the filter output. The input EMI filter includes notch filters tuned at active rectifier and motor drive inverter switching frequencies and diverts common-mode current into DC bus. The active rectifier has a DC output. A motor drive inverter is connected to the DC output. The motor drive inverter has a poly-phase motor control output. | 05-28-2015 |
20150136974 | HIGH TEMPERATURE DIFFERENTIAL ION MOBILITY SPECTROSCOPY - In a first embodiment, a spectroscopy device comprises a preheater, an ionizer, and a differential ion mobility spectroscopy (DMS) analyzer. The preheater is disposed to heat inlet air to 150° C. or more. The ionizer is disposed to receive and ionize heated inlet air from the preheater. The differential ion mobility spectroscopy (DMS) analyzer has a reception element configured to detect ionized chemical agents in the inlet air. | 05-21-2015 |
20150130486 | ELECTRICAL CONNECTOR PIN COVER - One embodiment includes a method for protecting from the accidental application of an electrical potential to an incorrect pin of a multipin electrical connector during testing. A sleeve is fitted around a pin that is not to have potential applied to it such that the pin is protected from accidental application of potential during testing. | 05-14-2015 |
20150124407 | HIGH-TEMPERATURE ENVIRONMENT ELECTRONIC CHASSIS - An electrical chassis for use in high temperature environments is disclosed. The electrical chassis may be employed, for example, in close proximity to the combustion chamber of a jet engine. The electrical chassis is constructed with a substrate formed from a material with low thermal conductivity and low electrical conductivity, such as polyetheretherketone. A reflective surface may be disposed on a housing containing the substrate to reduce the absorption of radiation. A heat sink and fluid inlet and outlet may also be arranged to remove heat generated by the electrical components. | 05-07-2015 |
20150118052 | PIVOTING BLADE COUNTERWEIGHT - A propeller system includes at least one propeller hub having a plurality of hub arms formed therein. The plurality of hub arms are arranged circumferentially on the at least one propeller hub and are spaced apart from one another by a hub distance. The propeller system further includes a plurality of propeller blades. Each propeller blade includes a base portion rotatably disposed in a respective hub. At least one counterweight is coupled to the base portion of a respective propeller blade. The counterweight includes a hinge configured to pivot a portion of the at least one counterweight. | 04-30-2015 |
20150117942 | DOWEL ELEMENT - A dowel element is provided and includes a shank portion including first and second mating parts. One of the first and second mating parts includes a first exterior surface and is formed to define an anti-fretting relief including a second exterior surface recessed from the first exterior surface in a radial dimension. | 04-30-2015 |
20150110633 | RETENTION ASSEMBLY WITH A CONICAL INTERFACE FOR A PROPELLER BLADE - A retention assembly for a propeller blade includes an inner ring that is conformally shaped to a bore of an annular loop, the annular loop being associated with a root portion of the propeller blade; a base that is configured to be immediately adjacent the annular loop; an annular outer ring including a bearing race interface that is conical in shape and includes a radially inner surface that conforms to a radially outer surface of the annular loop; and an adhesive that adhesively connects complementary surfaces of the outer ring and the annular loop. Also, a propeller blade assembly includes a propeller blade having a blade portion and a root portion; and the retention assembly that is configured to attach to the propeller blade. | 04-23-2015 |
20150110630 | RETENTION ASSEMBLY FOR A PROPELLER BLADE - A retention assembly for a propeller blade includes an inner ring that is conformally shaped to a bore of an annular loop, the annular loop being associated with a root portion of the propeller blade; a base that is configured to be immediately adjacent the annular loop; an outer ring that includes an extended tapered portion which decreases in radial thickness from an inboard end to an outboard end; and an adhesive that adhesively connects complementary surfaces of the outer ring and the annular loop. Also, a propeller blade assembly includes a propeller blade having a blade portion and a root portion and the retention assembly configured to be attached to the propeller blade. | 04-23-2015 |
20150110429 | CHAMBERED SHAFT FOR IMPROVED BEARING LUBRICATION - A shaft for a bearing lubrication assembly includes an outer surface and a reservoir disposed within the shaft. A first seal groove is formed on the outer surface and extends a full circumference of the outer surface. A second seal groove is also formed on the outer surface and extends the full circumference of the outer surface. A radial port extends from the reservoir to the outer surface, the radial port intersecting the outer surface between the first seal groove and the second seal groove. A plurality of chambers are formed in the shaft and disposed axially between the first seal groove and the second seal groove. The plurality of chambers are open to the outer surface with each chamber having a closed bottom disposed radially inward from the outer surface. Each chamber is also circumferentially spaced from one another. | 04-23-2015 |
20150108385 | ROTARY METERING VALVE ASSEMBLY AND METHOD OF MODIFYING CONTACT SURFACE FOR REDUCING GAUGE WRINGING - A rotary metering valve assembly includes a stationary body plate having a first contact surface. Also included is a valve plate having a second contact surface disposed in contact with the first contact surface of the stationary body plate, wherein the valve plate is configured to rotate relative to the stationary body plate. At least one of the first contact surface and the second contact surface comprises a surface flatness of less than about 2.4 μm (about 93 μin) and a surface roughness of at least about 0.2 μm (about 8 μin). | 04-23-2015 |
20150104313 | BRUSH DESIGN FOR PROPELLER DEICING SYSTEM - A brush configured to engage a rotating component to transfer an electrical signal and/or power is provided including a body formed from a core material. A coating material is disposed over a portion of the body configured to contact the rotating component. A contact area between the brush and the rotating component increases as the coating material wears. | 04-16-2015 |
20150104309 | AIRCRAFT CONTROL SYSTEM AND METHOD - An aircraft control system includes a co-axial, counter-rotating propeller shaft assembly. Also included is a first rotor operatively coupled to the propeller shaft assembly, the first rotor having a first plurality of blades mounted thereto, wherein the first plurality of blades are disposed at a substantially identical nominal pitch during rotation of the first rotor. Further included is a second rotor operatively coupled to the propeller shaft assembly, the second rotor having a second plurality of blades mounted thereto, wherein a pitch of the second plurality of blades is configured to cyclically change during rotation of the second rotor. | 04-16-2015 |
20150104308 | BRUSH DESIGN FOR PROPELLER DEICING SYSTEM - A propeller assembly is provided including a plurality of blades arranged in diametrically opposed pairs. Each of the plurality of blades has an electrical deicer located thereon. The propeller assembly also includes a slip ring, and a stationary brush arranged in contact with the slip ring. The brush is configured to transfer electrical power from a power source to the slip ring. A movable portion of an actuator is configured to sequentially couple the electrical deicers of each pair of blades to the rotating slip ring. | 04-16-2015 |
20150104302 | RAM AIR FAN HOUSING - A fan housing of a ram air fan assembly is provided including a flange having at least one tab. The at least one tab includes a first portion extending generally perpendicularly from the flange and a second portion extending generally parallel to the flange. A notch is formed by an inclined surface and a curved surface at an intersection between the first portion and the second portion. The second portion is elongated and extends about 0.020 inches beyond a front surface of the first portion. | 04-16-2015 |
20150104301 | MOTOR HOUSING FOR A CABIN AIR COMPRESSOR - motor housing for a cabin air compressor includes a central body portion having a center wall thickness and an internal cavity that is configured to receive an electric motor, a first end portion having a second internal cavity that is configured to receive a first end winding of the stator, and a second end portion having a third internal cavity configured to receive a second end winding of the stator. A ratio of a wall thickness of either of the first or the second end portions to the motor wall thickness is at least greater than 1.68 to 1. | 04-16-2015 |
20150101838 | HOUSINGS WITH EMBEDDED BUS BARS AND STANDOFFS - Housing for electrical components includes a housing body, an insulating body and a bus bar. The insulating body is disposed within the housing body and is integral with the housing body. The bus bar is disposed within the within the housing body and embedded in the insulating body. The insulating body and housing body are integral with one another for fixing the bus bar within the housing body. | 04-16-2015 |
20150101687 | Liquid Valve Design with internal Check Valve - A valve is provided including a valve body and a valve element arranged within the valve body. The valve body includes an inlet port, an outlet port, and an inner surface that defines a flow channel. The valve element includes a through passage and is configured to rotate between an open position and a closed position to control a flow of fluid through the flow channel. A check valve assembly is arranged within the valve element generally perpendicular to the through passage. The check valve assembly is configured to move between a first position and a second position in response to an increase in pressure when the valve element is in a closed position. | 04-16-2015 |
20150101339 | ENERGY EFFICIENT PUMP SYSTEM - A fuel system for a gas turbine engine, which includes a combustor section and an actuator, includes a fuel source, a combustor system, and an actuation system. The combustor system includes a combustor pump that is fluidly connected to the fuel source and to the combustor section, with the combustor pump being mechanically connected to and powered by an electric motor. The actuation system includes an actuator pump that is fluidly connected to the fuel source and to the actuator, with the actuator pump being mechanically connected to and powered by a gearbox or an electric motor. | 04-16-2015 |
20150100139 | FREQUENCY SHIFTED PI CONTROLLER - A system including a frequency shifted proportional-integral (PI) controller system utilizing input band-shifting, a PI control architecture and inverse band-shifting is disclosed. The frequency shifted PI controller system may eliminate errors and/or take control action based on past and present control errors. The feedback signal may be multiplied times sine of the theta position of the frequency of interest and the feedback signal may be multiplied times cosine of the theta position of the frequency of interest. Stated another way, the initial feedback signal is parsed into sine and cosine components at a particular frequency. This effectively band-shifts the feedback signal for treatment by the PI controller. | 04-09-2015 |
20150099205 | MANIFOLD FOR PLURAL FUEL CELL STACKS - An assembly has a plurality of fuel cell stacks with at least one wall. At least one manifold portion is provided outwardly of the at least one wall of each of the fuel cell stacks. The at least one manifold portion for a pair of the plurality of fuel cell stacks is on facing surfaces with an intermediate wall between the at least one of the manifold portions on the pair of the plurality of fuel cell stacks. A method of forming an assembly of a plurality of fuel cell stacks is also disclosed. | 04-09-2015 |
20150099204 | REGULATION OF A FUEL CELL ASSEMBLY - A fuel cell assembly according to an exemplary aspect of the present disclosure includes, among other things, a first fuel cell stack in series with a variable resistor and a second fuel cell stack in parallel with the first fuel cell stack and in series with a contactor. A resistance level of the variable resistor is adjusted in response to deactivating the contactor. | 04-09-2015 |
20150098814 | TURBINE HOUSING - A turbine housing includes a turbine inlet plenum and a turbine housing body. The turbine housing body includes a turbine outlet mounting face, a seal plate mounting face, and a center bore formed between the turbine outlet mounting face and the seal plate mounting face. A first support is formed about the turbine inlet plenum and in contact with the turbine housing body. A relief pocket is formed in the first support proximate the seal plate mounting face. The relief pocket is formed at a first distance from a turbine housing center axis of the center bore and at a first depth relative to the seal plate mounting face. A ratio of the first distance to the first depth is between 2.66 and 2.90. | 04-09-2015 |
20150098805 | INSULATING SEAL PLATE FOR AN AIR CYCLE MACHINE - A seal assembly of an air cycle machine includes a seal plate with an outer diameter. A bore extends axially through a center of the seal plate and a seal land is disposed at least partially within the bore. The seal land includes an inner diameter and a minimum ratio between the inner diameter of the seal land and the outer diameter of the seal plate is approximately 0.1985. | 04-09-2015 |
20150098169 | BUS BAR ASSEMBLY COMPRISING A MEMORY METAL COMPOSITION - A power distribution system element formed via an additive manufacturing technique, such as applying a conductive material to a memory metal substrate, are discussed herein. In operation (e.g. in response to delivering current through the distribution system), the memory metal contracts while the conductive material expands. The result is distribution system element having reduced thermal expansion, which can be net zero coefficient of thermal expansion. | 04-09-2015 |
20150098161 | INTEGRATED CORONA FAULT DETECTION - A power distribution cabinet includes a housing having walls that define an interior space for housing electric components. A capacitive sensor is located on an interior surface of one or more of the walls. The capacitive sensor includes a first conductive layer located proximate to the interior surface of the wall, a second conductive layer located distal from the interior surface of the wall, and a dielectric layer located between the first and second conductive layers. First and second output terminals are connected to the first and second conductive layers of the capacitive sensor to provide an output representative of displacement current within the power distribution cabinet. | 04-09-2015 |
20150097709 | RESOLVER-TO-DIGITAL CONVERTER - According to one aspect, a resolver-to-digital converter includes a first filter configured to receive a first delta-sigma modulated resolver input. A second filter is configured to receive a second delta-sigma modulated resolver input. A summing junction is configured to output a difference between a scaled output of the first filter and a scaled output of the second filter. A controller is configured to generate a controller output based on a product of a demodulator and an output of the summing junction. An integrator is configured to generate an estimated position based on the controller output. The resolver-to-digital converter also includes a compensator configured to generate a compensated estimated position based on the controller output and a compensation offset delay adjustment. | 04-09-2015 |
20150097644 | MAGNETIC DEVICES WITH INTEGRAL COOLING CHANNELS - A magnetic device includes an electrically insulating body and a conductor coil. The insulating body defines an internal cavity for a magnetic device core and a coolant channel routed about the internal cavity. The conductor coil extends through the insulating body and winds about the internal cavity. The electrically insulating body electrically insulates the internal cavity and coolant channel from the conductor coil. | 04-09-2015 |
20150097580 | TIP CLEARANCE MEASUREMENT SYSTEM - A tip clearance measurement system (TCMS) includes a probe and sensing circuitry. The probe directs microwave signals toward a turbine blade and receives microwave signals reflected by the turbine blade. The sensing circuitry includes a switch having a first state in which a main frequency is provided at an output of the switch and a second state in which a reference frequency is provided at an output of the switch. The sensing circuitry further includes a first conditioning circuit that receives a frequency provided at the output of the switch and provides a conditioned frequency to the probe and a second conditioning circuit that receives both the conditioned frequency provided by the first conditioning circuit and a reflected frequency received by the probe, and provides a conditioned output based on the conditioned frequency and reflected frequency. | 04-09-2015 |
20150097506 | Voltage Step-up Six-phase Autotransformer Passive Rectification AC-DC Converter - A three phase step-up autotransformer construction is discussed herein. The passive 12-pulse AC-DC converter offers simplicity, high reliability and low cost solution to AC-DC power conversion. The autotransformer is a component of the passive 12-pulse AC-DC converter. The autotransformer converts three-phase AC power into six-phase AC power. With appropriate vector design, the autotransformer may be configured to draw a near sinusoidal 12-pulse current waveform from the three-phase voltage source. The six-phase output may be configured to drive a rectifier (non-linear) load. | 04-09-2015 |
20150097464 | HIGH SPEED ROTOR CONNECTION SUPPORT - A rotor connection support comprising a main connection ring configured to reduce the moment load on fastener locations (such as threaded fastener locations) by integrating stand-off posts into a high strength plate are discussed herein. These stand-offs may be configured to reduce the stresses on the high stress concentration/low cross section threads. Also, included is an improved wire routing and wire support configured to maximize the fatigue cycles of the main field lead wires. | 04-09-2015 |
20150097130 | FLUX BYPASS FOR SOLENOID ACTUATOR - An electromagnetic solenoid actuator comprises a ferromagnetic core and a ferromagnetic plunger. The ferromagnetic core supports a plurality of windings, and is oriented along an axis. The ferromagnetic plunger is aligned axially with the ferromagnetic core, and is translatable along the axis to vary a width of an air gap separating the ferromagnetic plunger from the ferromagnetic core. The ferromagnetic plunger and the ferromagnetic core overlap axially at a flux bypass that provides an alternative flux path that diverts increasing flux away from the air gap as the width of air gap decreases. | 04-09-2015 |
20150097077 | PASSIVE FAIL SAFE COUPLING MECHANISM - A ground propulsion assembly for an aircraft includes an axle, a wheel rotatably connected to the axle, and a transmission. The transmission includes a housing mounted proximate the axle and a drive element disposed at least partially outside of the housing and operatively connected to a power input. A disengagement spring is disposed between the transmission and the axle and the disengagement spring is configured to urge the drive element out of engagement with the wheel. An actuator is operatively connected between the transmission and the axle, the actuator being configured to selectively generate a force in opposition to the disengagement spring such that the drive element moves relative the wheel and operatively engages the wheel to transfer torque to the wheel. | 04-09-2015 |
20150096437 | ACTUATOR FOR RAT DEPLOYMENT - An assembly includes an actuator assembly having a housing, a piston positioned at least partially within the housing and movable relative to the housing for an overall actuation stroke, a first spring operatively engaged between the piston and the housing to provide actuation biasing force therebetween, a second spring operatively engaged with the piston, and a spring guide. The spring guide is operatively engaged with the first spring and operatively engaged with the piston via a sliding connection. The spring guide is further configured to limit a stroke of the first spring such that the first spring contributes actuation biasing force between the piston and the housing for only a fractional portion of the overall actuation stroke of the piston. | 04-09-2015 |
20150096371 | SPEED SENSOR IDENTIFICATION - A method of initializing speed sensors in a rotational system is used determine a sensor spacing. An indexing feature is identified at each of two locations on an outer circumference of a wheel path corresponding to two speed sensors, as well as the speed of the wheel. The spacing of the sensors is then determined. | 04-09-2015 |
20150090436 | FLUID BASED THERMAL CONDUCTIVITY CONTROL - A temperature control system may include a compartment having at least one side with low thermal conductivity and a side with a double wall, the double wall having an interior wall and an exterior wall, the interior wall and the exterior wall having high thermal conductivity and forming a channel therebetween and a reservoir connected to the channel. A drive may be contained within the reservoir, wherein the drive is responsive to a temperature within the compartment to transfer a liquid with high thermal conductivity from the reservoir into the channel to increase thermal conductivity between the interior of the compartment and the exterior of the compartment, and allows a gas with low thermal conductivity to be present within the channel when the channel does not contain the liquid to decrease thermal conductivity between the interior of the compartment and the exterior of the compartment. | 04-02-2015 |
20150086185 | PULSE WIDTH MODULATED MULTIPLE HEATER CONTROL - A system includes, in one example, a first heater device, a second heater device, and a temperature sensor, each disposed within a fluid flow. The system further includes a controller communicatively coupled to the first heater device, the second heater device, and the temperature sensor. The controller is configured to receive, from the temperature sensor, an indication of a measured temperature of the fluid flow. The controller is further configured to control, based on a difference between the measured temperature of the fluid flow and a target temperature, operation of the first heater device via a first pulse width modulation signal and operation of the second heater device via a second pulse width modulation signal. | 03-26-2015 |
20150083378 | SYSTEM AND METHOD FOR DISTRIBUTING REFRIGERANT TO A PARALLEL FLOW HEAT EXCHANGER USING REFRIGERANT INJECTORS - A heat exchanger is disclosed that includes a plurality of parallel refrigerant paths, and a refrigerant injector operatively associated with an inlet to each refrigerant path for independently metering single phase refrigerant into each of the parallel refrigerant paths. | 03-26-2015 |
20150076951 | ELECTRIC MACHINE CONSTRUCTION - An electric machine includes a laminated stack. The laminated stack includes first and second additively manufactured conductive phase coils. Each of the first and second additively manufactured phase coils includes of a plurality of conductive strands. An additively manufactured end winding conductively couples the first and second phase coils. The end winding has a non-circular cross-sectional geometry. | 03-19-2015 |
20150076667 | SEMICONDUCTOR SUBSTRATE INCLUDING A COOLING CHANNEL AND METHOD OF FORMING A SEMICONDUCTOR SUBSTRATE INCLUDING A COOLING CHANNEL - A semiconductor substrate for use in an integrated circuit, the semiconductor substrate including a channel defined on a surface of the substrate. The channel includes a first wall, a second wall, and a third wall. The first wall is recessed from the surface. The second wall extends from the surface to the first wall. The third wall extends from the surface to the first wall and faces the second wall across the channel. At least one of the second wall and the third wall includes a plurality of structures projecting into the channel from the second wall or the third wall. | 03-19-2015 |
20150075310 | COMPOUND HARMONIC DRIVE - A harmonic drive includes a first flexible gear and a second flexible gear disposed around the first flexible gear and coaxial with the first flexible gear. A first ring gear meshes with the first flexible gear, and a second ring gear meshes with the second flexible gear. | 03-19-2015 |
20150075215 | SYSTEM AND METHOD FOR DISTRIBUTING REFRIGERANT TO PARALLEL FLOW PATHS OF A HEAT EXCHANGER USING FLOW RESTRICTORS - A heat exchanger is disclosed that includes a plurality of parallel refrigerant paths, and a distributor for delivering refrigerant to the plurality of parallel refrigerant paths, the distributor defining a flow restrictor at an entrance to each refrigerant path, wherein the flow restrictors are configured to keep the distributor pressurized at a predetermined level and thereby maintain single phase refrigerant flow into each of the parallel refrigerant paths. The flow restrictors further induce even flow distribution by providing choked flow to each refrigerant path. | 03-19-2015 |
20150068620 | PRESSURE REGULATING VALVE ASSEMBLY - A pressure regulating valve assembly includes a housing. Also included is a valve sleeve mounted within a bore of the housing, the valve sleeve having a first portion and a second portion, the second portion having a diameter less than the first portion and received in a sense piston bore of the housing. Further included is a valve spool mounted within the valve sleeve. Yet further included is a sense piston disposed within the second portion of the valve sleeve. Also included is a damping orifice extending through an end portion of the second portion of the valve sleeve. | 03-12-2015 |
20150068612 | VALVE WITH PRECISION MOUNTED HINGE PIN POSTS - A valve includes a housing with a flow passage and a hole extending into the housing; a post with a base and a hole extending into the base, the post connected to the housing; and a dowel pin which sits in the hole of the housing and extends into the hole in the post. | 03-12-2015 |
20150059397 | METHOD OF OPERATING A MULTI-PACK ENVIROMENTAL CONTROL SYSTEM - An environmental control system (ECS) pack is provided including a primary heat exchanger, a secondary heat exchanger, and an air cycle machine. The air cycle machine includes a compressor and a turbine. The compressor is fluidly coupled to an outlet of the primary heat exchanger and to an inlet of the secondary heat exchanger. The outlet of the secondary heat exchanger is fluidly coupled to the turbine. A first conduit connects the outlet of the primary heat exchanger and the inlet of the secondary heat exchanger. The first conduit includes a first valve. A second conduit connects the outlet of the secondary heat exchanger to an air load. The second conduit includes a second valve. | 03-05-2015 |
20150059356 | AIRCRAFT ENVIRONMENTAL CONTROL SYSTEM SELECTIVELY POWERED BY THREE BLEED PORTS - A bleed air supply system configured to supply bleed air from an engine to an environmental control system (ECS) pack is provided including a high pressure port configured to bleed air from a high spool of the engine. An intermediate pressure port is configured to bleed air from the high spool of the engine. The bleed air at the intermediate pressure port has a pressure less than the bleed air at the high pressure port. A precooler is fluidly coupled to the ECS pack, the high pressure port and the intermediate pressure port. Bleed air from the high pressure port and the intermediate pressure port is conditioned in the precooler before being provided to the ECS pack. A low pressure port is configured to bleed air from a low spool of the engine. The bleed air from the low pressure port bypasses the precooler and is supplied directly to the ECS pack. | 03-05-2015 |
20150053380 | HEAT EXCHANGER FIN WITH CRACK ARRESTOR - A method of extending the lifetime of brazed primary hot inlet wavy fin structures of aircraft heat exchangers includes inserting slots in the fins. The slots increase the mechanical compliance of the fins as well as act as crack arrestors should a thermally induced fracture occur. In an embodiment, the slots are inserted by EDM. | 02-26-2015 |
20150050830 | POWER CONNECTOR HAVING ENHANCED THERMAL CONDUCTION CHARACTERISTICS - A power connector assembly is disclosed that includes a connector shell formed from a heat conducting material, a plurality of connector pins arranged in the connector shell, and a heat conduction element arranged in the connector shell in thermal contact with the plurality of connector pins for conducting heat dissipated by the connector pins to the connector shell. | 02-19-2015 |
20150050149 | PROPELLER PITCHLOCK SYSTEM WITH A ROTATING INTERFACE - A pitchlock system includes a ballscrew screw mounted along an axis of rotation of an actuator, the ballscrew screw has an internal ballscrew bore; a pitchlock nut mounted about the ballscrew screw, the pitchlock nut including an internal pitchlock nut thread; a ballscrew ballnut mounted about the ballscrew screw and axially adjacent the pitchlock nut; a pitchlock actuation rod mounted axially within the internal ballscrew bore, the pitchlock actuation rod having an internal pitchlock actuation bore and a ball bearing aperture for receiving multiple ball bearings; a pitchlock retainer pin mounted axially within the internal pitchlock actuation bore; and a belleville spring which biases the ballscrew screw towards an axially fixed surface of the actuator in a pitchlock position, the ballscrew screw being movable between an operational position and the pitchlock position. | 02-19-2015 |
20150048699 | GENERATORS WITH OPEN LOOP ACTIVE COOLING - A rotor body for a high-speed generator includes a rotor body with interior and exterior surfaces, a coolant inlet and outlet, and a rotor cooling path for actively cooling the rotor body. The coolant inlet and outlet extend between the interior and exterior surfaces. An interior segment of the rotor cooling path fluidly couples the coolant inlet and coolant outlet and is bounded by the rotor body interior surface. An exterior segment of the cooling path is bounded by the rotor body exterior surface and fluidly couples the coolant outlet an environment external to the rotor body. | 02-19-2015 |
20150048617 | HEATED BYPASS VALVE FOR HEAT EXCHANGER - A heat exchanger bypass system comprises a liquid circuit, a first fluid circuit, a second fluid circuit, a first heat exchanger, a second heat exchanger, a liquid bypass line and a heated bypass valve. The first heat exchanger thermally couples the first fluid circuit to the liquid circuit. The second heat exchanger thermally couples the second fluid circuit to the liquid circuit. The liquid bypass line circumvents the first heat exchanger. The heated bypass valve controls flow through the liquid bypass line. | 02-19-2015 |
20150047820 | BENDABLE HEAT EXCHANGER - A heat exchanger for disposition within a duct having a curved surface is provided and includes a frame formed to define an inlet, an outlet and an interior by which the inlet and outlet are fluidly communicative, the frame including first and second surfaces having curvatures similar to that of the curved surface on either side of the interior and a heat exchanger fin disposed in the interior, the fin having corrugations and being formed to define slots transverse to the corrugations such that the fin is bendable along the curvatures of the first and second surfaces. | 02-19-2015 |
20150042437 | BOBBINS FOR GAPPED TOROID INDUCTORS - A bobbin for spacing windings around an inductor core includes an interior spacer defining an exterior surface for coupling interior spacer with an annular inductor core and an interior facing surface opposing the exterior surface for receiving inductor windings. The interior spacer has a thickness profile between the exterior and interior facing surfaces for spacing the windings inward from the inductor core to reduce magnetic fringe flux effects on the windings. An inductor body includes an inductor core coupled to bobbin. A wound inductor includes windings wrapped around the inductor body formed by the inductor core and bobbin. | 02-12-2015 |
20150041109 | HEAT EXCHANGER THERMAL FATIGUE STRESS REDUCTION - A plate fin heat exchanger includes a plate fin core having a plurality of plates defining a set of hot air passages extending from a hot air inlet region of the plate fin core to a hot air outlet region of the plate fin core and a set of cool air passages extending from a cool air inlet region of the plate fin core to a cool air outlet region of the plate fin core. The plate fin heat exchanger further includes a mounting flange circumscribing the cool air outlet region. At least a portion of the mounting flange has a plurality of heat transfer structures that extend into a flow path of cooling air exiting the cool air outlet region of the plate fin core. | 02-12-2015 |
20150041105 | REDUCED THERMAL EXPANSION CLOSURE BARS FOR A HEAT EXCHANGER - A plate fin heat exchanger is configured to receive hot flow from a hot source and cool flow from a cool source. The plate fin heat exchanger includes a plurality of plates arranged in parallel to define a plurality of flow passages there between, and a set of closure bars arranged at a first side of the plurality of plates to seal a first set of the flow passages against ingress of the hot flow, thereby directing the hot flow into a second set of the flow passages. Each respective closure bar includes an inner core formed of a first material having a first coefficient of thermal expansion and an outer cladding arranged about the inner core, the outer cladding formed of a second material having a second coefficient of thermal expansion. The first coefficient of thermal expansion is less than the second coefficient of thermal expansion. | 02-12-2015 |
20150040984 | DUAL HEAT EXCHANGER FUEL TANK INERTING SYSTEM - A fuel tank inerting system includes a bleed air inlet, a bleed air conditioning system, an air separation module, a nitrogen-enriched air conditioning system, a nitrogen-enriched air outlet, and a controller. The bleed air conditioning system is connected to the bleed air inlet and is configured to cool bleed air. The air separation module is connected to the bleed air conditioning system and is configured to produce nitrogen-enriched air. The nitrogen-enriched air conditioning system is connected to the air separation module and is configured to cool nitrogen-enriched air. The controller controls nitrogen-enriched air temperature and nitrogen-enriched air flow rate at the nitrogen-enriched air outlet. | 02-12-2015 |
20150037155 | FAN ROTOR PILOTING - A fan rotor has a plurality of blades arranged circumferentially about a central axis, wherein the plurality of blades extend between 2.9980 and 3.0020 inches radially from the central axis. The fan rotor has a root portion arranged radially inward from the plurality of blades. The fan rotor also has a web portion that connects the plurality of blades to the root portion, the web portion having a minimum longitudinal thickness between 0.2000 and 0.2100 inches. | 02-05-2015 |
20150037138 | THRUST SHAFT FOR RAM AIR FAN - A thrust shaft contains a shaft body having a disk at one axial end to provide a rotating surface in a thrust bearing, the disk having a first side and an opposite second side. The thrust shaft also contains a first section extending from the first side of the disk, the first section cylindrical in shape and having eleven holes uniformly spaced circumferentially about the first section, the holes being substantially axially equidistant from the first side of the disk. The thrust shaft also contains a second section cylindrical in shape having a smaller diameter than the first section, the second section extending from the first section to an end of the shaft remote from the disk. | 02-05-2015 |
20150035501 | SYSTEMS AND METHODS FOR CONTROLLING TORSIONAL OSCILLATION IN WOUND FIELD SYNCHRONOUS GENERATOR MACHINES - A method for controlling torsional oscillation includes detecting angular position of a wound field synchronous generator machine, extracting information indicative of torsional oscillation, selecting synchronous torsional oscillations, compensating for the synchronous torsional oscillations with an exciter signal, and controlling field current in the wound field synchronous generator using the exciter signal. A damping controller includes a damping module with a synchronous selective compensator and a synchronous notch filter for generating torsional oscillation compensation signals for asynchronous torsional oscillation. | 02-05-2015 |
20150035469 | SENSING PM ELECTRICAL MACHINE POSITION - An electrical machine includes a stator having a stator winding and a secondary transformer coil. A rotor is operatively connected to rotate relative to the stator, wherein the rotor includes a plurality of embedded permanent magnets. A primary transformer coil is wound on the rotor and is operatively connected to form a rotating transformer with the secondary transformer coil. An inverter/active rectifier component is operatively connected to the stator winding and the secondary transformer coil to control the stator winding based on a sense in the secondary transformer coil received from the primary transformer coil. | 02-05-2015 |
20150035392 | LIQUID COOLED MOTOR FOR CABIN AIR COMPRESSOR - A method of manufacturing a nonconductive liquid cooled back iron heat exchanger to house a conductive cooling liquid is disclosed. This method may include forming layers of material via additive manufacturing to create channels for transporting cooling liquid. The layers may be staggered to create electrically insulated liquid cooling channels. This method may include providing cooling liquid from a power electronics cooling system (PECS) heat exchanger via a pressure drop between the PECS heat exchanger back iron heat exchanger. Also described herein is a liquid cooled stator cooling system, including an aircraft cabin air compressor motor. The motor may include a motor housing and a stator core. A liquid cooled back iron heat exchanger may be positioned between the motor housing and the stator core. | 02-05-2015 |
20150034285 | HIGH-PRESSURE PLATE HEAT EXCHANGER - A heat exchanger plate has multiple structures thereon. A heat transfer portion has a plurality of ribs arranged in a rib pattern. A fluid ingress structure is arranged near a first corner of the heat exchanger plate. The structure includes a first open fluid aperture defined in the heat exchanger plate, and a first platform arranged between the first open fluid aperture and the first corner. The first platform is connected to a rib of the rib pattern. A fluid bypass structure is arranged near a second corner. The fluid bypass structure includes a closed fluid aperture defined in the heat exchanger plate, a second platform completely surrounding the closed fluid aperture, and a first corner rib arranged between the second platform and the second corner. The first corner rib is connected to a rib of the rib pattern. | 02-05-2015 |
20150034280 | HEADER FOR ELECTRONIC COOLER - A fluid cooler packet for a plurality of electronic components has a plurality of individual cooling circuits for receiving a supply of cooling fluid from a supply header and delivering that cooling fluid to an associated electronic component. The plurality of cooling circuits each includes a return passage for receiving a return fluid after having cooled the associated electronic component, and returns the return fluid to a return header. A volume of the supply header decreases in a downstream direction as it passes over the plurality of individual cooling circuits. A volume of the return header increases as it moves in a downstream direction over the plurality of individual cooling circuits. An electronic component array is also disclosed. | 02-05-2015 |
20150034278 | HEAT PIPE MATRIX FOR ELECTRONICS COOLING - A heat pipe system and methods of arranging a heat pipe system are provided. The heat pipe system includes a plurality of heat pipes, with each of the plurality of heat pipes including a hot end thermally coupled to a heat source and a cold end thermally coupled to a heat sink The plurality of heat pipes include a first pair of heat pipes. When the plurality of heat pipes are secured to a rotatable body, the first pair of heat pipes are aligned with and oriented in opposing directions along a first axis of rotation of the rotatable body. | 02-05-2015 |
20150033730 | COMPRESSOR HOUSING FOR AN AIR CYCLE MACHINE - A component of an air cycle machine includes a fan housing portion, a compressor housing portion, a main bore housing radius, a static seal radius, a shroud pilot housing radius, and an insulator seal plate housing radius. The fan housing portion includes a shroud for a fan section. The compressor housing portion includes a shroud for a compressor air inlet, a shroud portion for a compressor blade section, and a shroud portion for a compressor air outlet. The main bore housing radius is arranged about a central axis and is configured to circumscribe a shaft arranged along the central axis, the main bore housing radius being between 1.9400 and 1.9440 inches. The static seal portion is arranged about the central axis and positioned longitudinally adjacent to the main bore housing portion. The static seal portion is configured to circumscribe a static seal defined by the shaft, and has a radius between 2.0420 and 2.0440 inches. The shroud pilot housing radius is arranged about the central axis. The shroud pilot housing radius is between 5.9440 and 5.9470 inches. The insulator seal plate housing radius is arranged about the central axis and is configured to mate with an adjacent turbine section component. The insulator seal plate housing radius is between 8.6380 and 8.6420 inches. | 02-05-2015 |
20150029665 | COOLING FLUID FLOW PASSAGE MATRIX FOR ELECTRONICS COOLING - A cooling supply package for an electronic component has a supply port communicating with a plurality of outer supply channels, and a return port communicating with a plurality of outer return channels. The outer supply channels and outer return channels communicate with distinct ones of openings in a slot layer and into return and supply slots, respectively. An orifice layer supplies fluid to an electronic component from supply slots and receives return fluid into the return slots after having cooled the electronic component. A cooling supply and electronic combination is also disclosed. | 01-29-2015 |
20150029618 | NON-TRANSFORMER ISOLATED DC-DC POWER SUPPLY INCLUDING SHUT DOWN CIRCUIT - A direct current-to-direct current (DC-DC) power supply includes a voltage converter module that converts an input voltage having a first voltage level into an output voltage having a second voltage level that is less than the first voltage level. An over-voltage detection module receives the second voltage and generates an over-voltage signal indicating an over-voltage condition of the DC-DC power supply. A shutdown module receives the over-voltage signal and generates a shutdown signal in response to the over-voltage condition. An over-voltage protection module interposed between the shutdown module and the input of the voltage converter module. The over-voltage protection module is configured to selectively inhibit delivery of the input voltage to the voltage converter module in response to the shutdown signal. | 01-29-2015 |
20150028221 | METHODS OF ION SOURCE FABRICATION - A method of ion source fabrication for a mass spectrometer includes simultaneously forming aligned component portions of an ion source using direct metal laser fusing of sequential layers. The method can further include forming the component portions on a base plate made from a ceramic material by applying fused powder to the base plate to build the component portions thereon. | 01-29-2015 |
20150027906 | SOLID POLYMER ELECTROLYTE AMMONIA SENSOR - An ammonia sensor that includes an ionic liquid impregnated sensing electrode (anode) and a cathode separated by a membrane. During operation, in the presence of ammonia, the anode and cathode generate current manifesting the electrochemical reaction of ammonia in the sensing electrode. Ionic liquids distributed in the ionomer film in the gas diffusion electrodes ensure the reactivity under wide range of environment conditions while maintaining the ability of the device to quantify ammonia concentration in the environment. The sensor can therefore sustain long time operation without internal humidification due to the non-volatility of the ionic liquids. | 01-29-2015 |
20150027669 | HEAT EXCHANGER WITH EMBEDDED HEAT PIPES - A heat exchanger is disclosed which includes a plurality of heat exchanger plates. Each plate has a plurality of hollowed out pins arranged in a pin fin pattern. Each plate also includes an inlet aperture and an outlet aperture in fluid communication with one another. A plurality of heat pipes are defined by several of the plurality of hollowed out pins. A wicking material is arranged within the several hollowed out pins. A heat transfer fluid at least partially fills each heat pipe. | 01-29-2015 |
20150027568 | AIR PURGING PRESSURE REGULATING VALVE - A valve housing receives a spool and the spool has a regulating chamber selectively communicating a supply line to a return line. The spool is biased in one direction by a spring force and there is a second force biasing the spool in an opposed direction with the second bias force being provided by a fluid pressure within a hydraulic system associated with the pressure regulating valve. The amount of communication between the supply port and the return port is regulated by a position of the spool as the bias force from the fluid pressure change. Damper chambers are provided on opposed sides of the spool and serve to dampen a speed of movement of the spool and a supply line for supplying fluid into the damper chambers through check valves. The supply line serves to assist in purging air outwardly of the damper chambers. | 01-29-2015 |
20150027251 | ELECTRO-MECHANICAL ACTUATORS WITH INTEGRATED HIGH RESOLUTION WIDE OPERATING LOAD RANGE - An electro-mechanical actuator with wide operating range load includes a shaft and a speed summed differential coupled to rotate the shaft. A prime mover is coupled to the speed summed differential and is configured to react to an output torque of the screw shaft. A torsional spring coupled to the speed summed differential by way of a rotary position sensor for detecting the rotation of the screw shaft thereby measuring the output torque of the shaft for control of the prime mover. | 01-29-2015 |
20150014569 | COATING ARRANGEMENT FOR SLIDING ACTUATOR ASSEMBLY AND METHOD - A coated valve assembly includes a sleeve having a sleeve outer surface and a sleeve inner surface. Also included is a spool having a spool outer surface. Further included is a hardened surface formed on the sleeve inner surface and the spool outer surface. Yet further included is a coating disposed on the hardened surface of at least one of the spool outer surface and the sleeve inner surface, the second coating comprising a diamond-like carbon coating. | 01-15-2015 |
20150013587 | SAFETY PIN SYSTEM - A safety pin system for a product is provided and includes a safety pin disposable in a receiving element to disable the product, an obstruction disposable in a blocking position of a product disability indicator and a streamer configured to pass through an opening associated with the product and attached at opposite ends thereof to the safety pin and the obstruction. The opening and the obstruction are sized such that, when the obstruction is disposed in the blocking position with the streamer passed through the opening and the safety pin disposed in the receiving element, the obstruction is irremovable from the blocking position until the safety pin is removed from the receiving element. | 01-15-2015 |
20150008772 | INTEGRATED GAS TURBINE ENGINE ACCESSORIES - An permanent magnet alternator stator assembly for an integrated air turbine starter and permanent magnet alternator assembly has a permanent magnet alternator stator winding assembly attached to a mounting structure. A quick electrical connector electrically connects to the stator winding assembly and is attached to the mounting structure. The mounting structure includes an alignment aperture for removably attaching the permanent magnet alternator winding assembly to an air turbine starter. An integrated air turbine starter and permanent magnet alternator assembly and accessory gearbox assembly are also described. | 01-08-2015 |
20150007969 | HEAT EXCHANGERS WITH MULTI-LAYER STRUCTURES - A heat exchanger includes a pair of opposed, spaced apart heat exchanger plates defining a heat exchanger volume therebetween having an inlet and opposed outlet. A plurality of heat exchanger ribs are included within the heat exchanger volume. Each rib defines a rib body spanning the heat exchanger volume. Each rib body includes a plurality of slits therethrough to define a flow path through the heat exchanger ribs from the inlet to the outlet of the heat exchanger volume. The ribs and slits can be formed using ultrasonic additive manufacturing (UAM), for example. | 01-08-2015 |
20140375405 | SYSTEMS AND METHODS FOR INDUCTIVELY COUPLED DAMPER FOR DIRECT CURRENT POWER SYSTEMS - An electrical system for generating a reliable power source for starting an engine, including a first interface to a direct current power source and a second interface to an inverter. The inverter is coupled to a generator. An inductive damper is coupled to the direct current power source via the first interface and to the inverter via the second interface. The inductive damper comprises a primary winding, a secondary winding, and a resistor coupled to the secondary winding. The inductive damper operates to galvanically isolate the resistor from the direct current power source during a startup operation of the generator. An associated method is also disclosed. | 12-25-2014 |
20140369101 | METHOD OF DERIVING SWITCH CURRENT SIGNALS IN A RECTIFIER - A method of deriving synchronous switch currents for a three-phase Vienna-type active rectifier that includes the step of generating gate driver signals for each phase of the rectifier by pulse width modulation, wherein the gate driver signals include a top gate driver signal, a clamp gate driver signal and a bottom gate driver signal, and the step of deriving synchronous switch current signals from the gate driver signal, wherein the synchronous switch current signals include a top gate switch current signal, a clamp gate switch current signal and a bottom gate switch current signal. | 12-18-2014 |
20140369092 | METHOD OF REDUCING INPUT CURRENT DISTORTION IN A RECTIFIER - A method is disclosed for reducing input current harmonic distortion in a Vienna-type active rectifier that includes the steps of sensing voltage values from upper and lower halves of a DC bus associated with the rectifier, determining an average of the sensed voltage values, calculating upper and lower scale factors by dividing the sensed voltage values with the averaged sensed voltage value, rescaling a reference signal from a controller using the upper and lower calculated scale factors, and forward feeding the rescaled reference signal from the controller to a pulse width modulator to obtain a gate driver signal for power semiconductor switches of the rectifier. | 12-18-2014 |
20140363718 | THERMAL CONDUCTIVITY CONTROL DEVICES - A system for controlling thermal conductivity between two thermal masses is disclosed. The system includes a first conduction body in thermal contact with a heat source and a second conduction body in contact with a heat sink. A thermal expansion component operatively connects to the first conduction body and moves the body between first and second positions at a predetermined temperature. In the first position the first conduction body is spaced apart from the second conduction body, thermally isolating the heat source from the heat sink. In the second position the first conduction body thermally contacts the second conduction body, and conducts heat from the heat source, through the conduction bodies and into the heat sink. Related methods are also described. | 12-11-2014 |
20140357176 | MOTOR COOLING BLOWER AND CONTAINMENT STRUCTURE - A cabin air compressor assembly that include a cabin air compressor disposed at a compressor inlet and a cabin air compressor motor operably connected to the cabin air compressor. At least one cooling flow inlet is configured to direct a cooling flow through various pathways in the cabin air compressor assembly, including across the cabin air compressor motor. A blower is configured to boost the cooling flow across the cabin air compressor motor, thereby increasing cooling flow provided to the air compressor motor. A static seal plate is downstream of the blower and guides the boosted cooling flow toward a cooling flow exit. In addition, the static seal plate isolates boosted cooling flow from a moving rotor of the cabin air compressor, and also forms part of a containment structure that contains fragments and breakage that may come from the cabin air compressor rotor. | 12-04-2014 |
20140354049 | AUXILIARY WINDING FOR EXTENDED CURRENT MEASUREMENT - A power controller controls power to a load and includes a primary current sensor, a controller and a current source. The primary current sensor includes a primary conductor and an auxiliary conductor. The primary conductor carries a primary current to the load and the auxiliary conductor carries an auxiliary current in the opposite direction of the primary current to provide partial flux cancellation. The primary current sensor provides an output voltage based upon a magnetic field generated by the primary current and auxiliary current. The controller determines the primary current based upon the output voltage and the auxiliary current. The current source provides the auxiliary current. The controller controls the current source to provide the auxiliary current to the auxiliary conductor if the primary current is greater than a threshold value. | 12-04-2014 |
20140352934 | PLATE HEAT EXCHANGER - A plate heat exchanger includes a plurality of main plates having ridges and troughs to direct first and second flows of fluids across the main plates to exchange heat between the fluids while maintaining the first and second flows of fluids separate from each other. The heat exchanger also includes a first end plate including first and second inlets and first and second outlets. The first end plate includes a substantially flat inside surface configured to contact the ridges of a first main plate among the plurality of main plates and at least one slot formed in the substantially flat surface to provide a fluid communication of the first fluid flow between the inlet and a cavity formed by the first end plate and the first main plate. | 12-04-2014 |
20140352933 | CORE ASSEMBLY FOR A HEAT EXCHANGER AND METHOD OF ASSEMBLING - A core assembly for a heat exchanger includes a plurality of parting sheets defining a plurality of fluid passages including a plurality of first fluid passages and a plurality of second fluid passages arranged in an alternating arrangement, wherein each of the plurality of parting sheets comprises a thickness of about 0.016″. Also included is a plurality of first fluid passage fins disposed between the plurality of parting sheets within each of the plurality of first fluid passages. Further included is a plurality of second fluid passage fins disposed between the plurality of parting sheets within each of the plurality of second fluid passages. Yet further included is a plurality of closure bars disposed between respective pairs of the plurality of parting sheets. | 12-04-2014 |
20140346381 | VALVE WITH LATCHING RETURN SPRING - A valve according to an exemplary aspect of the present disclosure includes, among other things, a return spring. A latch mechanism includes a first magnet and a second magnet. One of the first and second magnets magnetically latches to the other first and second magnets in response to a control signal to minimize decompression of said return spring. | 11-27-2014 |
20140346379 | BACKFLOW PREVENTION VALVE - A valve assembly includes an outer housing having a first opening in fluid communication with a first fluid, a second opening in fluid communication with a second fluid, a third opening in fluid communication with a third fluid and a fourth opening in fluid communication with a fourth fluid. The valve assembly includes a piston configured to slide within the outer housing into a first position at which the third opening is blocked from fluid communication with the fourth opening based on a fluid pressure of the first fluid being greater than a fluid pressure of the fourth fluid. The piston is further configured to slide within the outer housing into a second position at which the third opening is in fluid communication with the fourth opening based on the fluid pressure of the second fluid being greater than the fluid pressure of the fourth fluid. | 11-27-2014 |
20140346315 | CABIN AIR COMPRESSOR SUPPORT BRACKET - A support bracket for a cabin air compressor (CAC) assembly includes a CAC mounting portion formed substantially orthogonal to an access portion and a structural support portion. A cross-support bracket mounting portion is formed at an angle relative to the access portion. An upper lug portion is formed at an angle relative to the access portion and substantially orthogonal to an upper lug. A plurality of CAC mounting holes is formed in the CAC mounting portion. The CAC mounting holes are distributed in an arc configuration along a CAC mounting hole circle radius. A plurality of lower slotted holes and an upper slotted hole are formed in the cross-support bracket mounting portion. A ratio of the CAC mounting hole circle radius to a length defined between the lower slotted holes and the upper slotted hole is between 5.93 and 6.25. | 11-27-2014 |
20140346302 | CABIN AIR COMPRESSOR CROSS-SUPPORT BRACKET - A cross-support bracket for a cabin air compressor assembly includes a mating portion having a first group of apertures at a first end and a second group of apertures at a second end. A reference line is defined between a lowermost primary aperture of the first group of apertures and a lowermost primary aperture of the second group of apertures. A stiffener portion is formed along a lower edge of the mating portion. A curved region is formed in the mating portion between a first and second upper edge of the mating portion. The curved region includes a first curved portion, a substantially straight portion, and a second curved portion. A ratio of a radius of the first and second curved portions of the curved region to a length from the substantially straight portion to the reference line is between 9.06 and 10.19. | 11-27-2014 |
20140346301 | CABIN AIR COMPRESSOR SUPPORT BRACKET - A support bracket for a cabin air compressor (CAC) assembly includes a CAC mounting portion formed substantially orthogonal to an access portion and a structural support portion. A cross-support bracket mounting portion is formed at an angle relative to the access portion. An upper lug portion is formed at an angle relative to the access portion and substantially orthogonal to an upper lug. A plurality of CAC mounting holes is formed in the CAC mounting portion. A plurality of lower slotted holes and an upper slotted hole are formed in the cross-support bracket mounting portion. A ratio of a length of longitudinal offset defined between the lower slotted holes and the upper slotted hole to a length of lateral offset between a center of at least one of the lower slotted holes and the upper slotted hole is between 2.47 and 2.91. | 11-27-2014 |
20140346278 | THERMAL PNEUMATIC DEICING SYSTEM FOR AN AIRCRAFT RAM AIR HEAT EXCHANGER - A thermal pneumatic deicing system for deicing a RAM air heat exchanger includes an environmental control system (ECS) including a RAM air heat exchanger and an outlet, an electronics housing including a plurality of electronic components, and a duct fluidically connecting the RAM air heat exchanger and the electronics housing. The duct includes a valve. A controller is operatively connected to the valve. The controller is configured and disposed to selectively fluidically connect the RAM air heat exchanger and the electronics housing to facilitate deicing of the heat exchanger. | 11-27-2014 |
20140345991 | ACTIVE AIRCRAFT BRAKE COOLING SYSTEM - An active aircraft brake cooling system includes an air intake and conditioning system having an outlet portion that is fluidically exposed to a landing gear bay. | 11-27-2014 |
20140345837 | HEAT EXCHANGER DISTRIBUTION ASSEMBLY AND METHOD - A heat exchanger distribution assembly includes a channel guide comprising an outer surface. Also included is an outer shell comprising a hollow portion and a plurality of distribution holes, wherein the channel guide is at least partially disposed within the hollow portion. Further included is a plurality of channel grooves disposed between an inner surface of the outer shell and the outer surface of the channel guide, wherein the plurality of channel grooves are configured to convert circumferentially spaced flow passages to axially spaced flow passages to route the fluid to a plurality of layers of a heat exchanger. | 11-27-2014 |
20140345699 | VENT VALVE - A vent valve according to an exemplary aspect of the present disclosure includes, among other things, a sensing sleeve defining a sensing chamber and a vent channel for venting fluid out of the sensing chamber. A sensing piston is moveable within the sensing chamber between an open position and a closed position. The sensing piston allows flow of the fluid into the vent channel during movement of the sensing piston between the open and closed positions. | 11-27-2014 |
20140345694 | LOW FRICTION FUEL METERING VALVE - A method of metering fuel with a fuel valve. The method includes arranging a spool within to a sleeve along an axis, wherein the spool includes four seal lands. The sleeve includes a fuel inlet aperture, a fuel outlet aperture, and a shutoff port. A first cavity and a second cavity are defined between the spool, the sleeve, and subsets of the seal lands. The fuel inlet port and the fuel outlet port abut one such cavity. Sliding the spool along the axis results in the fuel outlet aperture extending longitudinally beyond the second seal land in the upstream direction. | 11-27-2014 |
20140342201 | ELECTRICAL STORAGE DEVICE THERMAL MANAGEMENT SYSTEMS - A thermal management system for a high density power source is disclosed. The system includes a housing with an interior divided into first and second compartments. The first compartment is configured and adapted to house at least one electrical battery and the second compartment defines a coolant reservoir. A fluid release member connects the first and second compartments. Upon the first compartment reaching a temperature in excess of a predetermined limit, the fluid release member releases coolant form the second compartment into the first compartment to cool the at least one battery within the first compartment. | 11-20-2014 |
20140334932 | SPLIT BLADE RETENTION RACE WITH INNER AND OUTER CHAMFERS - A blade shank assembly for an aircraft propeller blade includes a blade shank; and a split blade retention race encircling the blade shank, the split blade retention race comprising two sections separated by two splits, the two splits being perpendicular to a race surface of the split blade retention race, wherein the split blade retention race comprises: an inner chamfer located between a surface of the split blade retention race that is adjacent to the blade shank and a split surface of the split blade retention race at each of the two splits; and an outer chamfer located between the race surface of the split blade retention race and the split surface at each of the two splits. | 11-13-2014 |
20140334208 | SYNCHRONOUS RECTIFICATION IN THE THREE-LEVEL INVERTER-CONVERTER TOPOLOGIES - A power module for a three-level power inverter/converter that employs synchronous rectification for use in a uni-directional active rectifier mode to reduce static losses and enhance efficiency across the circuit. Each synchronous rectifier can be a silicon carbide (SiC) power MOSFET connected in parallel with a SiC power diode, for example. | 11-13-2014 |
20140334074 | HEAT SINK FOR CONTACTOR IN POWER DISTRIBUTION ASSEMBLY - An electrical contactor assembly is provided including an electrical contactor, an electrical bus bar, and a panel formed from an electrically insulating material. At least one post protrudes through the panel and is in contact with the electrical bus bar. The at least one post is constructed from an electrically and thermally conductive material. A first end of the at least one post is configured to electrically and thermally connect to the electrical contactor. A heat sink is removably coupled to a second end of the at least one post. The heat sink includes a body having a plurality of fins extending radially outward. A first portion of the plurality of fins extends around a circumference of the body. A second portion of the plurality of fins extends around only a portion of the circumference of the body. | 11-13-2014 |