| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361020000 | Generator protective circuits | 56 |
| 20080204948 | Overload protection system for an electromagnetic lift - A method for protecting against current overload conditions associated with an electromagnetic lift system comprises receiving current data from a current monitoring device associated with an electromagnetic lift system. The method also includes determining a current level based on the collected current data, and identifying a predetermined overload range corresponding to the current level if the current level exceeds an overload current threshold. The method also includes monitoring a time that the current level is within the predetermined overload range, and providing a command signal to an actuator associated with the electromagnetic lift system if the time that the current level is within the predetermined overload range exceeds a predetermined time limit. The command signal causes the actuator to substantially limit mechanical power provided to a generator associated with the electromagnetic lift system. | 08-28-2008 |
| 20080304188 | Wind Power Generation System and Control Method Thereof - In a wind power generation system, an energy consuming unit is connected to a DC part of a generator-side converter. A shunt circuit is connected between the generator-side converter and a rotor of an AC-excited power generator. In the event of system failure, the switching operation of the converter is stopped, the shunt circuit is put into operation, and the energy consuming unit is put into operation so that DC voltage (voltage of the DC part) is maintained within a prescribed range. | 12-11-2008 |
| 20090168275 | SHORT PROTECTION DEVICE FOR ALTERNATOR - A short circuit protection device for the protection of an alternator in which turning on/off a trigger switch causes conduction/cutoff of the field current of the field coil of the alternator is disclosed. The protection device enables the field current to pass through a sensor so that when the field current is abnormally high and the voltage drop across the sensor rises, the potential of an input end of a boost circuit electrically connected to the sensor correspondingly arises and an output end of the boost circuit electrically connected to a shutoff device drives the shutoff device to turn off the trigger switch, and the boost circuit further keeps the shutoff device in on-state to hold the trigger switch off till the short circuit condition is eliminated and the protection circuit system is reset. | 07-02-2009 |
| 20100220417 | COMPACT DISCONNECTOR CIRCUIT-BREAKER FOR AN ALTERNATOR - An alternator disconnector circuit-breaker of the invention presents a compact structure. The axes of opening/closure of the change-over first switch ( | 09-02-2010 |
| 20100220418 | ALTERNATOR CIRCUIT-BREAKER WITH AN INSERTED RESISTANCE - An alternator disconnector circuit-breaker of the invention presents a resistance ( | 09-02-2010 |
| 20110026171 | Electronic Device for Protecting Against a Polarity Reversal of a DC Power Supply Voltage, and its Application to Motor Vehicles - The electronic device for protecting against a polarity reversal of a DC power supply voltage comprises, produced within one and the same integrated circuit, an N-channel main transistor (TP) mounted on the line of expected positive polarity of the power supply voltage and command means (MCM) for the main transistor comprising a charging pump circuit (CP), associated with a dynamic biasing circuit (MCTRL) for the substrate regions of active components connected to the main transistor. | 02-03-2011 |
| 20110128655 | GENERATOR CIRCUIT BREAKER WITH FIBER-OPTIC CURRENT SENSOR - The current in a generator circuit breaker is measured using the Faraday effect of an optical sensing fiber looped around the breaker's conductor. The sensing fiber is arranged in a sensing strip, which can be mounted to the enclosure of the generator circuit breaker or to the conductor. Exemplary embodiments can have a wide measuring range and can easily be fitted to new or existing generator circuit breakers. | 06-02-2011 |
| 20110242710 | INTEGRAL CURRENT TRANSFORMER SHUNT RESISTOR - An electrical power system may comprise a power source, an electrical load and an interconnection path between the power source and the electrical load. At least one power-source current transformer may be positioned at the power source. At least one remote current transformer may be positioned remotely from the power-source current transformer so that a portion of the interconnection path is between the power-source and the remote current transformer. A control circuit may be interposed between the power-source and remote current transformers and may be responsive to current imbalance between the power-source and remote current transformers to disconnect the power source from the electrical load in the event of such imbalance. The at least one power-source current transformer may comprise a secondary winding having first and second ends, and a resistor connected across the first and second ends. This resistor may provide a path for current transformer secondary current to flow in the event of an open circuit failure in the control circuit or the interconnection path between the current transformer and the control circuit. Consequently voltage across the current transformer secondary may be limited to a level that will not damage the secondary windings. The control circuit may detect the open circuit failure and act to isolate the power source from the load with the minimum of time delay. The current transformer is thereby protected from open circuit failures. | 10-06-2011 |
| 20120063039 | SYSTEMS AND METHODS FOR PROTECTION OF COMPONENTS IN ELECTRICAL POWER DELIVERY SYSTEMS - Various embodiments disclosed herein provide protection to monitored equipment at both a local level and a system level, in order to offer more comprehensive protection. In one particular embodiment, the protected equipment may include one or more generators. The protection system may utilize time-synchronized data in order to analyze data provided by systems having disparate sampling rates, that are monitored by different equipment, and/or equipment that is geographically separated. Various embodiments may be configured to utilize a variety of sampling rates. | 03-15-2012 |
| 20120087049 | LOW-FREQUENCY CIRCUIT BREAKER - An object is to obtain a low-frequency circuit breaker which has a simple configuration and a small size as a whole and is advantageous in view of costs. There is provided a low-frequency circuit breaker, in which a semiconductor switch and a mechanical switch are connected in parallel with each other. The semiconductor switch is configured by connecting a thyristor and a thyristor in anti-parallel with each other. These members are controlled by the circuit breaker control circuit. | 04-12-2012 |
| 20120200960 | METHOD FOR MEASURING A CURRENT, IN PARTICULAR BY MEANS OF A GROUNDING APPARATUS - The invention is a method and electric circuitry for measuring a grounding current of a photovoltaic power system incorporating a photovoltaic inverter, a measurement current being led through two shunts disposed at different points. The measurement current is a current that may flow alternatively at two different points at different electric potentials, the current flowing at a potential that differs by at least 50 V from the potential of the point of evaluation. The shunts are inserted in such a manner in a current mirror circuit that the voltage drop caused by the measurement in the shunts generates an asymmetry in the current mirror the magnitude of which is proportional to the measurement current. The measurement current is the grounding current of the photovoltaic power system with optional positive or negative pole grounding. | 08-09-2012 |
| 20120243129 | SHORTING PROTECTION FOR SYSTEMS HAVING ELECTRIC MACHINES - Shorting protection for systems having electric machines is provided. A protective device is put in shunt with an electric power system and an electric machine. The protective device is in an open state during normal operation and in a closed state in response to detection of a fault. In the closed state, the protective device forms a short circuit that isolates the electric power system from the electric machine. | 09-27-2012 |
| 20120320475 | PERMANENT MAGNET ALTERNATOR MARGIN DETECTOR - A shunt regulated permanent magnet alternator voltage source includes a permanent magnet alternator, a shunt regulator, and a pulse width modulation controller. Also included is a load controller capable of detecting a PMA margin. | 12-20-2012 |
| 20130194704 | PROTECTION CIRCUITS AND METHODS FOR ELECTRICAL MACHINES - An assembly includes an electrical machine connected to a power converter by a three-phase circuit having three conductors, e.g. cables. Each conductor is associated with a switching device such as a contactor or the like that connects the conductor to a common conductor or terminal. In the event of a fault current being developed in the circuit or the power converter, the switching devices are operated to close the fault current and connect together the conductors or the three-phase circuit to provide a full three-phase short circuit. | 08-01-2013 |
| 20130271877 | OVERCURRENT PROTECTION AND FAULT ISOLATION - An overcurrent fault protection method includes detecting an overcurrent fault in a variable frequency electric power generation system having a first main generator connected to a first alternating current bus through a first generator line contactor, a second main generator connected to a second alternating current bus through a second generator line contactor and an auxiliary power generator connected to a plurality of bus tie contactors, through a third generator line contactor, and connected to at least one of the first and second alternating current buses through the plurality of bus tie contactors, in response to detecting the overcurrent fault, locking out one or more of the plurality of bus tie contactors and in response to a continued detection of the overcurrent fault, opening at least one of the first second and third generator line contactors. | 10-17-2013 |
| 20130271878 | AUTOMATIC FAULT ISOLATION METHODOLOGY - A method and system for responding to a fast trip protective element trip in a generator system that re-excites the generator when a fast trip protection element trips and determines whether the generator immediately retrips the fast trip protection element, thereby determining whether a fault is located in the generator or in an attached load. If it is determined that the fault is located in the load, the system re-excites and reconnects the load after disabling the fast trip protection element for a specified period to allow for the load to clear its fault. | 10-17-2013 |
| 20130271879 | Fault Protection System For A Power System Of Dynamically Positioned Vessel - A fault protection system of a power system of a dynamically positioned vessel is provided. The power system has a power distribution bus having three or more bus subsections, electric connections including bus ties which connect the bus subsections in a ring configuration, and circuit breakers connected between the bus subsections. The fault protection system includes a generator circuit breaker for coupling a generator to a bus subsection, feeder circuit breaker(s) for coupling load(s) to the bus subsection, a first circuit breaker for connecting one end of the bus subsection to a bus tie that provides an electric connection to another bus subsection, the first circuit breaker being a bus tie breaker, a second circuit breaker for coupling another end of the bus subsection to a further bus subsection, protection relays for operating the circuit breakers, and communication links between protection relays that exchange information via said communication links. | 10-17-2013 |
| 20130286513 | Subtransient Current Suppression - A system and method for subtransient current suppression in a power system. A generator is configured to provide an output current to a power distribution system. A current sensor is configured to sense the output current. A switch is configured to direct the output current to ground when the switch is closed. A controller is configured to close the switch for a time delay in response to identifying a level of the output current that is greater than a threshold level and to automatically open the switch in response to identifying an end of the time delay. | 10-31-2013 |
| 20130301166 | METHOD OF MEASUREMENT FOR DETECTING A FAULT OF A THREE-PHASE ZONE - Method for protecting an electrical energy distribution box, the electrical energy distribution box comprising a set of distribution bars intended to be connected between a generator and loads, each of the bars being able to transfer at least a part of the electrical energy passing through it to at least one other bar of the set of bars. According to this method, the incoming and outgoing currents of a single distribution bar are measured and a fault in the set of bars is detected on the basis of the currents measured in the said bar. | 11-14-2013 |
| 20140177108 | POWER SYSTEM HAVING SHORT CIRCUIT PROTECTION CONTROLLER - A power system that supplies electrical power to at least one load is disclosed. The power system may include an electrical power generator, current sensors configured to provide current signals representative of currents output from the electrical power generator to the load, and voltage sensors configured to provide voltage signals representative of voltages output from the electrical power generator to the load. The power system may also include a controller configured to receive the current signals and the voltage signals, compare the current signals and the voltage signals to a predetermined map, determine whether a short circuit exists inside the electrical power generator based on the comparison, and send a command to turn off the electrical power generator when the short circuit exists inside the electrical power generator. | 06-26-2014 |
| 20140211344 | FAULT DETECTION SYSTEM AND METHOD FOR A GENERATOR - An electric vehicle is provided having an electric generator and a motor. Generated electrical energy may be routed to a DC bus of an inverter system. The inverter system may be configured to provide the electrical energy to the motor. A controller may detect a fault based on the voltage level of the DC bus. | 07-31-2014 |
| 20140268430 | BREAKER DESIGN FOR POWER SYSTEM RESILIENCY - An autonomous breaker can apply a current through a high impedance source to a bus coupled to either end of a breaker in order to measure an impedance of the bus. The status of the bus can be determined from the measurement. Based on the determined status, a fault detection procedure can be selected and implemented to determine if a fault exists on the bus. When the fault detection procedure has been implemented and no fault has been detected, the breaker can close, and thus couple the bus to another bus. | 09-18-2014 |
| 20140334044 | ROTARY ELECTRIC MACHINE FOR A VEHICLE - A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line. | 11-13-2014 |
| 20150098156 | ARC FLASH MITIGATION SYSTEM FOR USE WITH GENERATOR EXCITATION SYSTEM - An arc flash mitigation system for use with a generator excitation system is provided. An exemplary arc flash mitigation system includes three semiconductor fuses, three current transformers, an overcurrent detection circuit, a gate firing circuit, and three pairs of thyristors respectively arranged in an anti-parallel phase-to-phase configuration. An exemplary method includes detecting an overcurrent and providing a gate signal to each of a plurality of thyristors included in a crowbar circuit. | 04-09-2015 |
| 20160181790 | GENERATOR PROTECTION ELEMENT | 06-23-2016 |
| 20220140602 | DYNAMIC FAULT RIDE THROUGH BANDS FOR WIND POWER INSTALLATIONS - Provided is a method for controlling at least two frequency-converter-based infeeders. The method includes specifying a first droop for a first frequency-converter-based infeeder and specifying a second droop for a second frequency-converter-based infeeder, where the second droop is different from the first droop. The method includes, controlling the first frequency-converter-based infeeder in dependence on the first droop, and controlling the second frequency-converter-based infeeder in dependence on the second droop. | 05-05-2022 |
| 361021000 | Voltage responsive | 30 |
| 20080232005 | METHOD FOR PROTECTING AN ELECTRIC GENERATOR - A method for protecting an electrical generator which includes providing an electrical generator which is normally synchronously operated with an electrical power grid; providing a synchronizing signal from the electrical generator; establishing a reference signal; and electrically isolating the electrical generator from the electrical power grid if the synchronizing signal is not in phase with the reference signal. | 09-25-2008 |
| 20080259509 | RESONANCE FIELD DISCHARGE - A field discharge circuit may rapidly reduce the field current of a generator, thereby avoiding an overvoltage condition. The field discharge circuit of the present invention may use another storage device, such as a capacitor, to quickly transfer the field current energy thereto and then slowly dissipate the transferred energy after the event (such as removal of a load) has passed. By transferring this energy to a storage device and subsequently slowly discharging this energy through a resistor, electromagnetic interference caused by a conventional resistive discharge can be reduced. | 10-23-2008 |
| 20090290270 | OVERLOAD CONTROL OF AN ELECTRIC POWER GENERATION SYSTEM WITH UNKNOWN AVAILABILITY OF MECHANICAL POWER CAPACITY - A control system for an electrical power generation system (EPGS) provides overload protection without disconnecting a generator of the EPGS from an excessive electrical load. Available engine power and current levels of the electrical load are continuously measured and computed. A command voltage is calculated in real time that corresponds to a voltage required to sustain with the maximum available power. Output voltage of a generator of the EPGS is controlled at the calculated command voltage so that a power limit of the engine is not exceeded during electrical overload conditions. | 11-26-2009 |
| 20100053825 | METHOD FOR PROTECTION OF AN ENERGY STORAGE SOURCE, AND IN PARTICULAR A MOTOR VEHICLE BATTERY - A method for protection of an energy storage source ( | 03-04-2010 |
| 20100091417 | Overvoltage protective device for wind energy installations - An overvoltage protective device for wind energy installations is designed for connection to a connecting line having at least one inductance between a wind energy installation and a grid system. The overvoltage protective device has a controller which operates a limiting unit as a function of an overvoltage at the wind energy installation. The limiting unit comprises a spur line having an induction module and a power tapping module which is provided with a switching unit. This yields a second power strand which can accept a considerable reactive current if necessary, thus increasing the voltage drop across the inductance, as a result of which the voltage acting on the wind energy installation is reduced. | 04-15-2010 |
| 20110134574 | SYSTEMS AND APPARATUS RELATING TO WIND TURBINE ELECTRICAL CONTROL AND OPERATION - An electrical system for connecting a wind turbine to a power grid that includes: a frequency converter that converts electric power produced by a generator of the wind turbine into electric power that is synchronized with the electric power of the power grid; a transformer that steps up the voltage for connection to the power grid, the transformer being disposed between the frequency converter and a connection to the power grid; and a grid-side crowbar circuit; wherein the grid-side crowbar circuit is configured to apply a short circuit to the electrical system upon the detection of a fault. | 06-09-2011 |
| 20120081817 | Arrangement For Protecting Equipment Of A Power System - An arrangement for protecting equipment of an AC electrical power system comprises first means configured to measure the frequency of the current and voltage at at least one location in the electrical power system along an interconnection between two theoretical electric machines of an equivalent two machine system. Fourth means are configured to use the values of the frequency of the current and voltage measured to determine whether a power swing has occurred and if an occurrence of a power swing has been determined determine whether the measuring location is located on a motor side or a generator side of a potential pole slip electrical centre along said interconnection, the electrical centre being defined as the location where the voltage becomes zero during a pole slip, and send this information further to third means for use in a control for protecting equipment of the electrical power system. | 04-05-2012 |
| 20120147506 | METHOD OF DETECTING AN UNINTENTIONAL ISLAND CONDITION OF A DISTRIBUTED RESOURCE OF A UTILITY GRID, AND PROTECTIVE APPARATUS AND CONTROLLER INCLUDING THE SAME - A protective apparatus is for a distributed resource of a utility grid. The protective apparatus includes a processor having an input structured to input frequency of the distributed resource, a first output structured to control speed of the distributed resource, a second output, and a routine structured to actively bias engine-generator speed of the distributed resource through the first output, and detect a predetermined change in the frequency of the distributed resource from the input and responsively indicate the unintentional island condition through the second output. The protective apparatus also includes a circuit interrupter. | 06-14-2012 |
| 20120182648 | OVERVOLTAGE LIMITER IN AN AIRCRAFT ELECTRICAL POWER GENERATION SYSTEM - A generator includes a permanent magnet generator, an exciter and a main generator mounted for rotation on a shaft. The main generator is configured to produce a voltage output. A generator control unit includes a circuit configured to provide current from the permanent magnet generator to the exciter. A switch is provided in the circuit and is configured to change between open and closed conditions. The switch is configured to flow current in the circuit in the closed condition and interrupt current flow in the open condition. An overvoltage limit controller is programmed to determine an amount of overvoltage of the output voltage exceeding a desired voltage. Either a fixed reference threshold is used or a reference threshold voltage is calculated based upon the duration in over voltage condition, and the switch is modulated between the open and closed conditions according to error between the actual output voltage and the reference threshold voltage to limit the output voltage to the desired reference threshold voltage. | 07-19-2012 |
| 20120194948 | INDEPENDENT, REDUNDANT OVERVOLTAGE PROTECTION FOR A GENERATOR - A generator controller provides independent and redundant overvoltage protection to an associated generator. The generator controller monitors the generator output at a first point of a regulation and a second point of regulation. A generator control unit (GCU) provides overvoltage protection based on the generator output monitored at the first point of regulation, including at least one of tripping a first generator control relay (GCR) to remove excitation from an exciter winding and tripping a generator line contactor (GLC) to disconnect the generator output from a bus. A overvoltage protection unit (OPU) provides independent, redundant protection based on the generator output monitored at the second point of regulation, including at least one of tripping a second GCR to remove excitation from the exciter winding and tripping the GLC to disconnect the generator output from the bus. | 08-02-2012 |
| 20130003231 | OVERVOLTAGE PREVENTION IN AN AIRCRAFT ELECTRICAL POWER GENERATION SYSTEM - An example method of detecting a generator overvoltage condition includes predicting a primary control current to provide a predicted control current, monitoring the primary control current, and detecting a generator overvoltage condition based on a comparison of the predicted control current to the primary control current. The method interrupts the primary control current based on the comparing. | 01-03-2013 |
| 20130033787 | MOBILE GENERATOR AND MOBILE GENERATOR PROTECTIVE DEVICE - A mobile generator for generating a direct voltage for a tool supplied with direct current includes an alternating-voltage generator ( | 02-07-2013 |
| 20130107400 | SYSTEM FOR MONITORING A MACHINE USING A DIGITAL PROTECTIVE RELAY | 05-02-2013 |
| 20130182354 | OVERVOLTAGE PROTECTION DURING GCU FAILURE - An overvoltage protection system for a power generating system includes a generator control relay (GCR) controlling a conduction path through a generator exciter field, a flyback impedance in parallel communication with the generator exciter field, the flyback impedance configured to dissipate energy from the generator exciter field in response to opening of the conduction path, a gate drive configured to open and close the GCR, and an overvoltage prevention unit in signal communication with the gate drive, the overvoltage prevention unit configured to monitor a voltage and a current associated with the generator and selectively open and close the conduction path in response to the monitored voltage and current. | 07-18-2013 |
| 20130194705 | TOWER OF A WIND ENERGY INSTALLATION WITH CURRENT CONDUCTION MEANS - A tubular tower ( | 08-01-2013 |
| 20130301167 | TRANSFORMER ARRANGEMENT FOR WIND TURBINE AND METHOD FOR CONTROLLING VOLTAGE - A transformer arrangement for a wind energy system is described. The transformer arrangement includes a transformer core; a primary winding wound around the transformer core and adapted for being connected to an electrical load; a first secondary winding wound around the transformer core and adapted for being connected to a power source; and a control system for controlling the first transformer. Further, the transformer arrangement includes a part of a second secondary winding adapted for being connected to a power source and adapted for reducing at least one of for the voltage of the first secondary winding and the voltage applied to the electrical components of the wind turbine in the case of an overvoltage event. | 11-14-2013 |
| 20140055889 | METHODS FOR PROVIDING GENERATOR STATOR WINDING GROUND FAULT PROTECTION - The present invention includes a method for providing ground fault protection to a generator. The method includes determining the existing state of the generator and second, determining the updated alarm or trip conditions of a relay connected to the generator in view of the existing state of the generator. This includes estimating a ratio of the magnitude of the 3 | 02-27-2014 |
| 20140078625 | ISLANDING DETECTION METHOD AND SYSTEM - The present invention provides an islanding detection method and an islanding detection system. The method includes: acquiring a voltage signal at a grid-connected node of a power generation system, and extracting phase information of the voltage signal; constructing a slip-mode frequency shift islanding detection curve in the form of a quadratic function according to the phase information; and generating a disturbance signal according to the slip-mode frequency shift islanding detection curve, and sending the disturbance signal to an inverter of the power generation system. The method and system can avoid a non-detection zone, and can perform an inverter islanding detection in a fast and accurate manner under simple control. | 03-20-2014 |
| 20140118864 | METHOD AND SYSTEM FOR POWER SWING DETECTION IN A GENERATOR - A generator protection device is provided. The generator protection device includes a safety factor estimation module configured to estimate a safety factor as a function of a terminal voltage (V | 05-01-2014 |
| 20140168825 | HARDWARE-BASED, REDUNDANT OVERVOLTAGE PROTECTION - A generator system includes a generator and a generator control unit (GCU). The GCU is connected to monitor and regulate the generator output voltage. The GCU includes a protection signal processor that receives monitored generator voltages and executes software to detect an overvoltage condition. The GCU further includes redundant, hardware based overvoltage detection that detects a peak voltage value associated with the monitored generator voltage and includes a fast overvoltage detection circuit that generates a first overvoltage fault signal if the peak voltage value is greater than a first threshold value and includes an inverse overvoltage detection circuit that generates a second overvoltage fault signal if the peak voltage value is greater than a second threshold value for a duration of time that varies with a magnitude of the peak voltage value. | 06-19-2014 |
| 20140185166 | Methods and Systems for Monitoring Excitation of a Generator Based on a Faulty Status of a Generator Breaker - Systems and methods for monitoring excitation of a generator based on a faulty status of a generator breaker are provided. According to one embodiment, a system may include a controller and a processor communicatively coupled to the controller. The processor may be configured to receive, from a contact associated with a generator breaker, a reported status of the generator breaker, receive operational data associated with one or more parameters of a generator associated with the generator breaker, and correlate the reported status of the generator breaker and the operational data. Based on the correlation, the processor may establish an actual status of the generator breaker, and, based on the actual status, selectively modify a mode of excitation of the generator. | 07-03-2014 |
| 20140192442 | Alternator Overvoltage Protection Circuit - Disclosed is an alternator overvoltage protection circuit having a TRIAC and a MOSFET. The TRIAC is electrically connected to the MOSFET and the TRIAC is electrically connected to a magneto. The TRIAC is configured to ground the magneto when triggered by the MOSFET. The MOSFET is electrically connected to an alternator and configured to conduct when the alternator operates in an overvoltage condition. Also disclosed is a method of alternator overvoltage protection for a piece of outdoor power equipment, the method including providing a TRIAC and an alternator rotated by an engine having a magneto, wherein the alternator outputs a voltage when rotated by the engine. The method further includes configuring the TRIAC to ground the magneto when the alternator operates in an overvoltage condition, thereby disabling the magneto, which stops the rotation of the engine and stops the alternator from outputting voltage. | 07-10-2014 |
| 20140268431 | ROTATING DIODE ASSEMBLY INCLUDING OVERVOLTAGE PROTECTION CIRCUIT - A brushless wound field synchronous generator configured to generate an output power to drive an electrical load includes a rotating rectifier assembly. The rotating rectifier assembly includes a rotating diode assembly and a field effect transistor (FET) to control voltage across the rotating diode assembly. | 09-18-2014 |
| 20150303677 | ELECTRIC POWER GENERATION SYSTEM USING PERMANENT MAGNET MACHINE WITH IMPROVED FAULT REMEDIATION - A system for generating and supplying electrical power to DC loads on an aircraft may include a permanent magnet machine (PMM) generating an output voltage at a plurality of output terminals and a solid-state switch connected to each of the output terminals to short-circuit the output terminal when the switch is ON. A control unit may be configured to detect an unbalanced fault in the system and, responsively to said detection, to close all of the switches simultaneously to convert the unbalanced fault to a balanced fault so that DC currents are precluded from circulating within the PMM. | 10-22-2015 |
| 20150311696 | SYSTEM AND METHOD FOR PROTECTING ELECTRICAL MACHINES - In one aspect, a method for protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines is provided. The method includes detecting a grid fault on an electrical system; taking one or more first actions from a first set of actions based on detected grid fault on the electrical system; detecting at least one operating condition of the electrical system after taking one or more first actions from the first set of actions based on the detected grid fault on the electrical system; and taking one or more second actions from a second set of actions based on the detected at least one operating condition of the electrical system. | 10-29-2015 |
| 20160013632 | PROTECTION SYSTEM AND METHOD FOR AN ELECTRICAL VARIABLE SPEED DOUBLY FED INDUCTION MACHINE | 01-14-2016 |
| 20160061881 | Smart Junction Box for Photovoltaic Systems - A “smart” junction box for photovoltaic systems provides electrical measurements of strings of photovoltaic cells to detect premature photovoltaic cell degradation, bypass diode failure, and arcing, and report the same to a central location and/or to provide for automatic disconnection of a given string of photovoltaic cells. The smart junction box also provides general reporting of electrical characteristics to the central system and allows disconnection by command from the central system. | 03-03-2016 |
| 20160126719 | METHODS FOR PROVIDING GENERATOR STATOR WINDING GROUND FAULT PROTECTION - The present invention includes a method for providing ground fault protection to a generator. The method includes determining the existing state of the generator and second, determining the updated alarm or trip conditions of a relay connected to the generator in view of the existing state of the generator. This includes estimating a ratio of the magnitude of the 3 | 05-05-2016 |
| 20160190796 | METHOD AND DEVICE FOR SUPPRESSING HIGH-VOLTAGE ELECTRICITY - A device for suppressing high-voltage electricity is connected to a three-phase circuit of an electric generator, including three up arm semiconductor switches, three low arm semiconductor switches, three reverse breakdown diodes respectively connected to the low arm semiconductor switches in parallel, and a control circuit sending PWM signals to turn on and off the low arm semiconductor switches sequentially to evenly share and absorb the energy of surge voltage. Each of the up arm semiconductor switches has a first terminal and a second terminal, wherein the first terminals are electrically connected together, and the second terminals are respectively electrically connected to one of three coils of the three-phase circuit. Each of the low arm semiconductor switches has a first terminal and a second terminal, wherein the first terminals are respectively electrically connected to the second terminals of the up arm semiconductor switches, and the second terminals are electrically connected together. | 06-30-2016 |
| 20160204601 | METHODS AND SYSTEMS FOR REDUCING THE IMPACT OF A GENERATOR SHORT CIRCUIT IN A WIND TURBINE | 07-14-2016 |
