Patent application number | Description | Published |
20080256954 | START FLOW MEASUREMENT - A method and apparatus for measuring a start fuel flow to a pilot nozzle of a fuel system of a gas turbine engine using pressure differential between fuel passages leading to fuel nozzles. | 10-23-2008 |
20080260519 | SURGE DETECTION IN A GAS TURBINE ENGINE - A method for detecting a surge condition during operation of a gas turbine engine includes detecting a change of pressure differential between fuel flows in a fuel system of the engine during engine operation. | 10-23-2008 |
20080315706 | CURRENT LIMITING MEANS FOR A GENERATOR - The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design. | 12-25-2008 |
20090008936 | MODULATION CONTROL OF POWER GENERATION SYSTEM - Methods and apparatuses are disclosed for producing current with a desired output frequency from one or more fixed or variable speed alternators by varying a saturation level of a portion of the alternator(s) based on a output frequency desired, and preferably then rectifying the output to produce a desired electrical output which may be provided as direct current or alternating current to a suitable load. | 01-08-2009 |
20090010752 | PUMP AND METHOD - A pump for moving a liquid including a rotor rotatable within a housing and slidable relative to the housing between a first axial rotor position during normal pump operation and a second axial rotor position during a pump inoperative condition. | 01-08-2009 |
20090195225 | SATURATION CONTROL OF ELECTRIC MACHINE - The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine. | 08-06-2009 |
20090237968 | POWER INVERTER AND METHOD - An apparatus and method for converting an input signal to an output AC signal in which the input voltage signal is inverted and modulated to provide an intermediate AC signal having twice the desired output frequency. The intermediate signal is then full-wave rectified and then the polarity of the rectified signal is switched every second cycle to produce the output AC signal of a desired frequency and voltage. | 09-24-2009 |
20090255652 | HEAT EXCHANGE DEVICE AND METHOD - A heat exchange device comprising a fluid flow passage having a plurality of successive segments in fluid flow communication with one another, the segments being adapted to maintain a developing flow therein and thereby improve heat transfer. | 10-15-2009 |
20090278413 | ARCHITECTURE FOR ELECTRIC MACHINE - The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding. | 11-12-2009 |
20090322088 | Torque transmission for an aircraft engine - The torque transmission system for an aircraft engine permits a starter-generator to drive the engine on starting at a speed reducing ratio. Once the engine is running, the engine then drives the starter-generator also at a speed reducing ratio. | 12-31-2009 |
20100019605 | INDUCTANCE AUGMENTER FOR AN ELECTRIC MACHINE - The electric machine comprises a rotor and stator, the rotor and stator having generally equal axial lengths. The stator has at least one primary and at least one control winding disposed around the stator. The electric machine comprises a stator extension of a magnetic material. The stator extension is disposed coaxially with the stator and has only the at least one control winding wrapped therearound. The stator extension extends axially adjacent the stator beyond an axial terminus of the rotor and defines a magnetic circuit around the at least one control winding. The stator extension is configured such that in use, the magnetic circuit remains unsaturated thereby increasing inductance of at least one control winding in an electric alternator/motor. | 01-28-2010 |
20100019707 | MOTOR DRIVING SYSTEM AND METHOD FOR STARTING A MOTOR - A method and system is provided for starting a motor which is useful, among other things, is useful for motors under unknown or variable load/inertia conditions. If a first attempt to start the motor using a first frequency ramp-up rate fails, a subsequent start attempt may be performed at a decreased frequency ramp-up rate. Iteration may be performed until starting of the motor is successfully achieved. | 01-28-2010 |
20100072959 | Modulation Control of Power Generation System - Methods and apparatuses are disclosed for producing current with a desired output frequency from one or more fixed or variable speed alternators by varying a saturation level of a portion of the alternator(s) based on a output frequency desired, and preferably then rectifying the output to produce a desired electrical output which may be provided as direct current or alternating current to a suitable load. | 03-25-2010 |
20100107882 | WOVEN ELECTROSTATIC OIL PRECIPITATOR ELEMENT - An electrostatic precipitator element comprises preferably a mesh made of at least two individually insulated conductors with defined openings therebetween. An electrical field in the openings electrostatically attracts suspended particulate to a respective conductors for collection. | 05-06-2010 |
20100133835 | TANDEM ELECTRIC MACHINE ARRANGEMENT - The tandem electric machine arrangement comprises an outside rotor having two axially spaced-apart sets of circumferentially-disposed permanent magnets. It also comprises an inside stator having at least two electrically-independent windings, the at least two windings axially spaced apart from one another and disposed relative to the magnet sets to thereby be magnetically coupled to a respective one of the sets of permanent magnets during rotation of the rotor. One of the rotor and the stator is provided in two separate pieces, each piece supported from opposite axial sides of the electric machine relative to one another. The other of the rotor and the stator is supported from substantially centrally of the two pieces. | 06-03-2010 |
20100148622 | ARCHITECTURE FOR ELECTRIC MACHINE - The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding. | 06-17-2010 |
20100199681 | FUEL SYSTEM OF GAS TURBINE ENGINES - A method for purging fuel from a fuel system of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system used to maintain fuel supply for engine operation, and under the reversed pressure differential substantially purging the fuel remaining in the system therefrom to a fuel source. | 08-12-2010 |
20100327109 | METHOD AND SYSTEM FOR TAXIING AN AIRCRAFT - The system is used for taxiing an aircraft and comprises at least one multi-spool gas turbine engine, the engine having an electrical motor in a torque-driving engagement with a low pressure spool of the engine. The low pressure spool has a propulsor connected thereon to generate thrust when rotated. A controller is connected to the electrical motor and an electrical power source to control an amount of electrical power provided from the power source to the electrical motor so as to drive the propulsor and cause at least a major portion of the thrust to be generated by the propulsor for moving the aircraft during taxiing. | 12-30-2010 |
20100328866 | AIRBORNE ELECTRONICS HOUSING ASSEMBLY - An aircraft electronics housing assembly maintains the electronics unit at given ambient conditions despite changes in conditions outside the housing during the aircraft flight cycle. | 12-30-2010 |
20110061396 | Relighting a Turbofan Engine - The method and apparatus for in-flight relighting of a turbofan engine involve in one aspect selectively controlling an accessory drag load on one or more windmilling rotors to permit control of the windmill speed to an optimum value for relight conditions. | 03-17-2011 |
20110192170 | AIR CONTAMINATION DETECTION IN AN AIRCRAFT AIR SYSTEM - An aircraft air system includes a gas turbine engine, a bleed air duct directing compressed air bled from a compressor to an inner compartment within the aircraft, and an air contamination detector located downstream of the gas turbine engine compressor. The air contamination detector includes a visual indicator which detects the presence of a fluid contaminant within the bleed air. | 08-11-2011 |
20110192646 | METHODS AND MATRICES FOR PRODUCTION OF ELECTRICAL CONDUCTORS - Matrices of multiple cast conductors, and methods for making such matrices. Methods according to the disclosure comprise: casting a conductor matrix including a plurality of conductors joined by at least one link; applying a surface treatment to at least a portion of the matrix; finishing a contact face on at least one of the conductors; and separating the conductors from each other at the at least one link. | 08-11-2011 |
20110193534 | MAGNETIC CONTROL CIRCUIT SEPARATION SLIT - An electric alternator/motor having a stator with at least two non-overlapping sectors is provided. Each sector includes a first winding, first and second magnetic circuits and a saturation control assembly. A cross-talk reduction feature, such as a peripheral slit is provided between each sector of the stator for impeding magnetic flux crossing between the sectors. | 08-11-2011 |
20110210688 | CONTROL OF BRUSHLESS MOTOR - Systems and methods for generating a signal useful in the commutation of current through windings of brushless direct current electric motors are provided. Such methods comprises detecting a kickback pulse in a non-driven winding of a motor; detecting a rotor-induced zero crossing in the non-driven winding following the detection of the kickback pulse; and using the detection of the rotor-induced zero crossing to generate a signal useful in commutation of the motor. | 09-01-2011 |
20110212677 | HOUSING ASSEMBLY FOR AN ELECTRICAL DEVICE - A housing assembly for an electrical device for use on an aircraft is provided. The assembly comprises a housing configured for containing at least one electrical component in a portion of the aircraft vented to atmosphere; and a pressure communication line for communicating between an interior of the housing and a source of pressurized gas available on the aircraft for other primary purpose. | 09-01-2011 |
20110213507 | HYBRID CONTROL SYSTEM - A hybrid control system for controlling an electric machine coupled to a gas turbine engine is provided. The control system comprises: a primary analog control loop including an analog controller for controlling the electric machine based on a set point and a measured output of the electric machine; and a digital controller of the turbine engine operationally connected to the primary analog control loop to adjust at least one control parameter associated with the analog controller. | 09-01-2011 |
20110213537 | Electronic Shaft Shear Detection Conditioning Circuit - An electrical control system for distinguishing between an electrical fault and a shaft shear condition in a gas turbine engine, the control system including, in one aspect, a detection circuit including: two or more probes, each probe including an associated resistor having a predetermined range of resistance, and each probe being disposed in the engine adjacent a rotary mounted shaft component, where mechanical interference between one or more of the probes and the shaft component renders the associated resistor substantially non-conductive; sensor processor(s) in communication with each probe, determining a probe operational status based on a measured resistance to current conducted through each probe, and generating a fault code when the measured resistance of at least one of the plurality of probes is not within the predetermined range of resistance. | 09-01-2011 |
20120126547 | DC MOTOR ASSEMBLY WITH SOFT STARTING CAPABILITY - A DC motor assembly ( | 05-24-2012 |
20120126833 | NON-CONTACT STRESS MEASURING DEVICE - Apparatuses and methods for measuring stress or strain in a conductive material without physical contact with the material are provided. The device comprises an inductor circuit configured to induce an alternating current into the material along a first path; and a detector configured to detect a signal representative of the stress in the material along the first path when current is induced in the material. | 05-24-2012 |
20120133150 | COMBINATION LOW SPOOL GENERATOR AND RAM AIR TURBINE GENERATOR - A power generating apparatus for use with an aircraft gas turbine engine has a low pressure spool assembly which includes an electrical generator. The electrical generator includes a generator stator supported on a stationary structure of the engine and a generator rotor rotatable around the generator stator and mounted to the low pressure spool assembly. | 05-31-2012 |
20120134069 | LOW INDUCTANCE CAPACITOR ASSEMBLY - A low-inductance capacitor assembly ( | 05-31-2012 |
20120249034 | POSITION SENSING CIRCUIT FOR BRUSHLESS MOTORS - A position sensing circuit ( | 10-04-2012 |
20120275069 | ELECTRIC MACHINE ASSEMBLY WITH FAIL-SAFE ARRANGEMENT - An electric machine assembly with fail-safe arrangement is described. The assembly comprises a stator including a plurality of windings and a cooperating rotor including at least one permanent magnet; a detector configured to detect DC current in at least one of the windings of the stator; and a bypass circuit configured to be activated upon detection of the DC current by the detector and to prevent at least some of the DC current from flowing into the at least one of the windings of the stator. | 11-01-2012 |
20140238642 | HEAT EXCHANGE DEVICE AND METHOD - A heat exchange device comprising a fluid flow passage having a plurality of successive segments in fluid flow communication with one another, the segments being adapted to maintain a developing flow therein and thereby improve heat transfer. | 08-28-2014 |
20140252171 | NITROGEN BUBBLER SYSTEM IN FUEL TANK AND METHOD - An assembly of fuel tank and bubbler system comprises a fuel tank defining a storage volume adapted to receive fuel therein. The fuel tank comprises at least one fuel inlet, at least one fuel outlet, and at least one gas inlet adapted to be connected to an inert gas source to feed inert gas to fill an ullage in the storage volume. A bubbler system has at least one pipe extending into the fuel tank and adapted to be immersed into the fuel of the fuel tank. The pipe has a porous structure. The pipe is adapted to be connected to an inert gas source to inject inert gas via the porous structure into the fuel of the fuel tank. A method for treating fuel in a fuel tank is also provided. | 09-11-2014 |