| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 322059000 | With excitation winding and/or circuit control | 60 |
| 20090045784 | A NOVEL AIRCRAFT ENGINE STARTER/GENERATOR - A rotor resistor and switch combination may cause a starter/generator device to function as an asynchronous device when in a start mode. Thus, starting torque may result. A starter/generator device may include an exciter rotor winding, a main rotor winding, and a resistor and switch combination positioned between the exciter rotor winding and the main rotor winding to control a flow of current in the main rotor winding during a start mode of the starter/generator device. A method of optimizing starting torque of a starter/generator device without a start controller unit during a start mode may include providing a main rotor winding of the starter/generator device, and providing a control to control a flow of current in the main rotor winding during the start mode. | 02-19-2009 |
| 20090153106 | Excitation Device for an Electric Machine - With an aim of minimizing excitation losses in electric machines having electrically excited and displaceable secondary parts, bi-directional inductive transmission of energy is carried out by a rotating inductive transmission device. An associated electronic system for the bi-directional transmission of power and/or energy, is provided. Advantageously, super-conductive inductance is present wherein the flow is introduced. It is possible to excite by supplying energy to the stator and to also de-excite by removing energy without converting the power into heat on the rotor by applying a bipolar tension. | 06-18-2009 |
| 20100039077 | LOAD ANGLE MEASUREMENT AND POLE SLIP DETECTION - Apparatus for measuring load angle in a synchronous generator is disclosed. The synchronous generator is of a type comprising a main machine, an exciter for exciting the main machine, and a permanent magnet machine for exciting the exciter. The apparatus comprises means for sensing a waveform produced by the permanent magnet machine, means for sensing a waveform produced by the main machine, and means ( | 02-18-2010 |
| 20100171470 | METHOD FOR MANAGING A POWER SUPPLY SYSTEM WITH A VARIABLE VOLTAGE, ESPECIALLY OF A MOTOR VEHICLE - A method for managing a power supply system with a variable voltage comprising the following steps: according to an instantaneous rotational speed of a rotating electrical machine, a power supply system output voltage with a variable voltage is set to an optimum output voltage between first and second service voltages in such a way as to maximize the electric power delivered by the electrical machine to an energy storage system; when the instantaneous rotational speed is slower than the nominal rotational speed, the output voltage is set to a first value which is substantially equal to the first service voltage in such a way as to maximize the yield of the transfer of energy from the electrical machine to a load; and when the instantaneous rotational speed is faster than the nominal rotational speed, the output voltage (U) is set to a second value substantially equal to the second service voltage in such a way as to maximize the yield of the transfer of energy from the electrical machine towards the load. | 07-08-2010 |
| 20100181969 | VOLTAGE REGULATED PERMANENT MAGNET GENERATOR - A single phase AC generator uses a rotor contained within a stator. The stator has an armature winding and a control winding which is capable of having its magnetic permeability adjusted, thereby limiting the output voltage of the armature winding. The stator additionally has two core sections. | 07-22-2010 |
| 20100207589 | DOUBLE-FED ASYNCHRONOUS GENERATOR AND METHOD FOR ITS OPERATION - The invention relates to a double-fed asynchronous generator, which is provided with a slipring rotor ( | 08-19-2010 |
| 20100253294 | STARTER VOLTAGE REDUCING SYNCHRONOUS MACHINE - An electric power generation system has a synchronous machine, a starter excitation source and an exciter field driver. The starter excitation source is connected to the synchronous machine via multiple phase connections, and the exciter field driver is connected to the synchronous machine via a portion of the same phase connections. At least one of the phase connections is connected to each other phase connection via a transient voltage suppressor. | 10-07-2010 |
| 20100277136 | GENERATOR WITH FERROMAGNETIC TEETH - A stator assembly for use in a superconducting generator operated at frequencies up to 10 Hz is disclosed. The stator assembly includes a ferromagnetic stator winding support having a plurality of teeth defining slots, the slots configured to receive and support stator windings. The stator winding support is formed so that the ratio of the sum of the widths of the slots to the sum of the widths of the teeth and slots is in the range of 0.65 to 0.90. | 11-04-2010 |
| 20110043171 | POWER GENERATION CONTROL DEVICE, VEHICLE EQUIPPED WITH POWER GENERATION CONTROL DEVICE, AND POWER GENERATION CONTROL METHOD - A power generation controller for controlling a power generation voltage of a generator; the power generation controller including a warning unit that warns about a start of a high-power load, a power generation voltage setting unit that sets a target of the power generation voltage of the generator and switches the target from a first voltage corresponding to a normal-power load to a second voltage that is higher than the first voltage when a warning is received from the warning unit, and an excitation current controller that controls an excitation current of the generator so that the power generation voltage of the generator becomes the first voltage when the target is the first voltage, and controls the excitation current of the generator so that the power generation voltage of the generator becomes the second voltage when the target is switched to the second voltage. | 02-24-2011 |
| 20110109277 | Electric circuit for generating electric power - An electric circuit is described for generating electric power. In this circuit, an asynchronous generator includes a stator and a rotor. On the stator side, the asynchronous generator is coupled to a power grid. The rotor current flowing to the rotor of the asynchronous generator can be measured. A control device is designed such that, in case of a fault in the power grid, the stator current flowing to the stator of the asynchronous generator is calculated from the measured rotor current as a function of parameters of the asynchronous generator. | 05-12-2011 |
| 20110109278 | VEHICLE-USE POWER GENERATION CONTROL APPARATUS AND VEHICLE-USE POWER GENERATION CONTROL SYSTEM - The vehicle-use power generation control apparatus includes a first section to control an excitation current of a vehicle generator driven by a vehicle engine such that a power generation voltage of the vehicle generator is kept at a first set value, a second section to perform gradual excitation control in order to gradually increase the excitation current, a third section configured to inhibit the gradual excitation control when the power generation voltage falls below a second set value lower than the first set value while the gradual excitation control is performed, a fourth section to detect a rotational speed of the vehicle engine or the vehicle generator, a fifth section to determine a limit value of the excitation current based on the detected rotational speed, and a sixth section configured to limit the excitation current below the limit value when the power generation voltage falls below the second set value. | 05-12-2011 |
| 20110133703 | ARCHITECTURE FOR DUAL SOURCE ELECTRIC POWER GENERATING SYSTEM - A dual source electric power generating system (EPGS) provides both a regulated AC output and a regulated DC output. The EPGS includes a rotating portion and a stationary portion. The stationary portion includes a plurality of windings (permanent magnet generator (PMG) armature windings, an exciter field winding, and high-voltage main generator armature windings), a voltage regulator, a rectifier, an inverter, a point of regulation (POR) sensor. The high-voltage main generator armature windings generate a high-voltage AC that is converted to a regulated, high-voltage AC by the rectifier and the inverter. The stationary portion is further characterized by circuitry for producing the regulated DC output from AC voltage produced by a winding other than the high-voltage main generator armature windings. | 06-09-2011 |
| 20110204857 | Systems and Methods for Controlling Electronic Circuitry with Separated Controllers - Embodiments provide systems and methods for controlling electronic circuitry. A system can include at least a first controller and a second controller and at least one power electronic circuitry module. The first controller can be in electrical communication with the power electronic circuitry module via a first high-speed serial link (HSSL). The second controller can be in electrical communication with the power electronic circuitry module via a second HSSL. | 08-25-2011 |
| 20110227544 | EXCITER ASSEMBLIES - An exciter assembly for supplying a field current to the rotor windings of a superconducting synchronous machine includes a pulse transformer having a stationary primary winding, a secondary winding and a tertiary winding. A switched mode power supply supplies a pulsed voltage to the primary winding of the pulse transformer. The pulsed voltage developed at the secondary winding of the pulse transformer is supplied to the rotor windings through a pair of transfer leads. A controller controls synchronous rectification of the pulsed voltage supplied to the rotor windings based on a signal from the tertiary winding of the pulse transformer. | 09-22-2011 |
| 20110260698 | GENERATOR UNIT FOR A MOTOR VEHICLE ELECTRICAL SYSTEM - A generator unit for a motor vehicle electrical system includes a generator, a first regulator module for regulating the operation of the generator and a digital interface, which is combined with the first regulator module to form one assembly, and includes a program-controlled second regulator module, which is also integrated into the assembly and receives control information via the digital interface. | 10-27-2011 |
| 20110298430 | RAPID DE-EXCITATION SYSTEM FOR SYNCHRONOUS MACHINES WITH INDIRECT EXCITATION - The invention relates to a rapid deexcitation system for synchronous machines ( | 12-08-2011 |
| 20120268082 | CONTROL DEVICE AND METHOD FOR CONTROLLING A SEPARATELY EXCITED ROTOR WINDING OF A SYNCHRONOUS MACHINE - A control device for a separately excited rotor winding (L | 10-25-2012 |
| 20120293139 | FIELD WINDING TYPE ROTARY ELECTRIC MACHINE - A field winding type rotary electric machine includes: a controller; a field current integration portion provided in the controller to calculate an integral value by integrating an excessive field current exceeding a field current threshold; a field current limiting portion provided in the controller and carrying out limiting processing to limit a field current to or below a predetermined value when the integral value reaches an integral value threshold defined as a reference value at or above which the field current is limited; a controller power supply connection switch switched ON and OFF for power feeding to the controller; a controller power supply connection determination portion switching ON and OFF the controller power supply connection switch; and a power feeding ON state maintaining portion maintaining an ON state of the power feeding to the controller from start to end of the limiting processing by the field current limiting portion. | 11-22-2012 |
| 20130300380 | SHAFT-DRIVEN GENERATOR SYSTEM - A shaft-driven generator system has a generator connected to a converter. An inverter supplies an AC voltage on a network side. The converter and the inverter are linked via a DC link circuit. The inverter has at least two phase modules, which each have an upper and a lower valve branch, which each have a plurality of two-pole sub-systems connected electrically in series. Each sub-system has a unipolar storage capacitor, to which a series circuit of two gate-controlled turn-off semiconductor switches is connected electrically in parallel. Each semiconductor switch has a diode connected antiparallel therewith. Thus, a shaft-driven generator system is obtained that has a DC-link converter as a static frequency converter for complying with the required network feedback and for managing transient operating states. | 11-14-2013 |
| 20140176087 | ALTERNATOR WITH VOLTAGE REGULATION - The present invention relates to an alternator to be electrically connected to a load, the alternator including a rotor including: a rotary field, an excitation winding, a dissipative component and a switchover system allowing the rotary field to be connected selectively to the excitation winding or to the dissipative component, and a controller controlling the switchover system so as to regulate the current in the rotary field and, in response to a reduction in the load applied to the alternator, connects the dissipative component to the rotary field to dissipate the inductive energy that has built up in the rotary field. | 06-26-2014 |
| 20140210426 | POWER GENERATION CONTROL UNIT DETERMINING MAXIMUM EXCITATION CURRENT OF POWER GENERATOR MOUNTED ON VEHICLE - An on-vehicle power generation control unit includes current detecting unit; communication unit; holding unit; maximum current determining unit; and current control unit. The current detecting unit detects the excitation current at the field winding. The communication unit communicates with an external equipment to receive a first upper limit. The holding unit holds a second upper limit. The maximum current determining unit determines a maximum current to be the second upper limit when the first upper limit has not received by the communication unit or when the received first upper limit is more than or equal to the second upper limit. Further, the maximum current determining unit determines the maximum current value to be the first upper limit when the received first upper limit is less than the second upper limit. The current control unit controls the detected excitation current to be within the maximum current value. | 07-31-2014 |
| 20140266080 | ROTATING ELECTRICAL MACHINE - A rotating electric machine and a method of magnetizing a rotor of a brushless rotating electric machine are disclosed, the method including forming a stationary magnetic field, rotating a rotor of a magnetizing machine in the stationary magnetic field for producing alternating current, rectifying the alternating current with a controllable bridge situated in the rotor, receiving control instructions wirelessly to the rotor, controlling a magnitude of current with the controllable bridge based on the control instructions, and feeding the controlled current to the magnetizing winding of the rotating electric machine. | 09-18-2014 |
| 20140368171 | VEHICLE POWER GENERATION CONTROL DEVICE - A vehicle power generation control device receives a first limit value related to restriction of an excitation current, which flows to a field winding of a vehicle power generator, when the first limit value is transmitted from an external device. By the vehicle power generation control device, a second limit value related to restriction of the excitation current is determined to be a control value for the excitation current. The second limit value is held in an own vehicle power generation control device. By the vehicle power generation control device, the first limit value is determined to be the control value, instead of the second limit value being the control value, when the first limit value is received. Based on the control value, the vehicle power generation control device controls the excitation current flowing to the field winding. | 12-18-2014 |
| 20150054472 | ACYCLIC EXCITER FOR AN ALTERNATOR - A self-excited alternator for generating electrical energy. The alternator includes a stator, a rotor, and an exciter. The rotor includes conductors which are integrated within the rotor via one of a casting process, a welding process, or a fastening process. The exciter includes a magnet producing a static magnetic field, and a rotatable conductive member coupled to the shaft and electrically coupled to the one or more conductors. The rotatable conductive member is operable to output the direct current to the one or more conductors upon rotation within the static magnetic field, thus exciting the alternator. | 02-26-2015 |
| 20150091534 | FIELD-WINDING ROTATING ELECTRICAL MACHINE - A field current limiting section includes a field current limitation instructing section for, when a field current limitation determining section determines that a determination value has reached a predetermined determination threshold value, generating a field current limiting instruction to a field current control section so as to limit field current to be equal to or smaller than a predetermined permissible value during a predetermined field current limitation time T | 04-02-2015 |
| 20150115904 | VEHICLE AC GENERATOR CONTROL APPARATUS - A vehicle AC generator control apparatus, the rotor of an vehicle AC generator | 04-30-2015 |
| 20160141989 | TWO STAGE FLUX SWITCHING MACHINE FOR AN ELECTRICAL POWER GENERATION SYSTEM - An electrical power generation system includes a flux switching machine (FSM) including an FSM rotor operatively connected to an FSM stator, the FSM rotor operatively connected to a shaft, wherein the FSM includes an electrical input/output (i/o) in electrical communication with the FSM stator, and a permanent magnet machine (PMM) including a PMM rotor operatively connected to a PMM stator, the PMM rotor operatively connected to a the shaft, wherein the PMM is electrically connected to the FSM. | 05-19-2016 |
| 322060000 | Substitute or auxiliary starting source of excitation | 3 |
| 20110057631 | STATIC EXCITER OF AN ELECTRIC GENERATOR, METHOD FOR RETROFITTING, AND METHOD FOR OPERATING - The static exciter ( | 03-10-2011 |
| 20110248687 | POWER SUPPLY SYSTEM FOR MOTOR VEHICLE - A power supply system for a motor vehicle is provided with: a generator that includes a rotor having a field coil and a stator having an armature coil; a rectifier that rectifies AC power generated in the armature coil; an excitation control circuit that takes control of a voltage applied to the field coil; a capacitor that is connected to the DC side of the rectifier, and receives and transfers the rectified power; a battery connected to an electric load of the motor vehicle; a DC-DC converter that is connected between the capacitor and the battery and capable of converting unidirectionally or bidirectionally an input DC voltage into any DC voltage; and a selection switch capable of selecting as a power supply source for the excitation control circuit either the capacitor or the battery. | 10-13-2011 |
| 20150364950 | AUXILIARY EXCITATION DEVICE OF A GENERATOR AND METHOD FOR CONTROLLING POWER EXCITATION OF THE SAME - An auxiliary excitation device is applied to a generator with a self-excited automatic voltage regulator (AVR). The auxiliary excitation device is installed between a battery and the AVR and constantly monitors the status of output voltage of the generator. When the output voltage of the generator instantaneously drops to a preset variation level, the auxiliary excitation device will convert a DC voltage from the battery into an AC voltage and boost the AC voltage to an auxiliary AC power. The auxiliary power is outputted to the AVR for the AVR to output excitation power to the generator, thereby providing additional excitation power to the generator and raising the output power of the generator. | 12-17-2015 |
| 322061000 | Alternating current excitation | 12 |
| 20090267572 | CURRENT LIMITATION FOR A DOUBLE-FED ASYNCHRONOUS MACHINE - In a method and an apparatus for controlling the output or drawn active and reactive power of a double-fed asynchronous machine ( | 10-29-2009 |
| 20100052626 | BRUSHLESS HIGH-FREQUENCY ALTERNATOR AND EXCITATION METHOD FOR DC, SINGLE-PHASE AND MULTI-PHASE AC POWER-FREQUENCY GENERATION - A method is disclosed for arranging and exciting the stator, rotor and various windings of a multi-stage brushless high frequency alternator so that the resulting multiple high frequency sub-phase armature winding outputs can be rectified and commutated into desired phases of power-frequency alternating current (AC) electrical output, including single-phase, split-phase, three-phase and other multiple phase output. Power frequency currents in field windings control output amplitude, output frequency, and output phase. If desired, DC power output can be accommodated as zero power-frequency operation. Devices incorporating this arrangement are suitable of generating fixed frequency electrical power while accommodating variable speed rotation of a generator shaft and offer multiple advantages over existing techniques. The capability to generate speed independent electric power allows natural power sources such as windmills and hydro-power stations to be efficiently coupled to fixed frequency power grids. | 03-04-2010 |
| 20100201330 | WIND POWER GENERATION SYSTEM - A wind power generation system includes an excessive current consumption device, an AC input of which is connected between a generator rotor and an excitation converter on a system failure to detect a DC voltage ascent of the excitation converter and operate a shunt circuit on the system failure. | 08-12-2010 |
| 20100207590 | HIGH FREQUENCY GENERATOR WITHOUT ROTATING DIODE RECTIFIER - A high frequency starter-generator system uses an electric machine design that does not employ rotating rectifiers installed on the rotor. The output frequency of such a starter-generator is increased by about 200% as compared with a conventional starter-generator with the same number of poles operating in the same speed range. This design allows significant weight and volume reductions of the electric machine while its reliability is increased. The present invention may find application in any starter-generator application, including more electric architecture-type aircraft designs currently in development. | 08-19-2010 |
| 20110309805 | METHOD FOR OPERATING A DOUBLY FED PERMANENT MAGNET SYNCHRONOUS MACHINE, AND A SYSTEM COMPRISING SUCH A MACHINE AND A CONVERTER - A method for operating a doubly fed permanent magnet synchronous machine and a system including such a machine and a converter for feeding and withdrawal of power. The machine has two or more winding groups where at least one winding group is connected directly to a grid and at least one winding group has the possibility to be connected to the grid via a power electronics converter or directly. | 12-22-2011 |
| 20130181688 | SYSTEM AND METHOD FOR VARIABLE SPEED GENERATION OF CONTROLLED HIGH-VOLTAGE DC POWER - A system and method are disclosed for advantageously using field-controlled high-frequency alternators for the generation of controlled high-voltage DC power from variable speed mechanical power sources such as wind turbines, water wheels, and gas or steam turbines. The production of controlled high-voltage DC power without involving hard switching of the full output power is described. | 07-18-2013 |
| 20140184174 | METHOD FOR CONTROLLING A WIND TURBINE - The present invention concerns a method of controlling a wind power installation having a generator with a stator, a pole wheel with at least two rotor poles with a respective pole winding for producing a magnetic field guided in the respective rotor pole, and an air gap between the stator and the pole wheel, including the steps— controlling a respective exciter current through each pole winding,— varying at least one of the exciter currents relative to at least one further one of the exciter currents, and/or— varying at least one of the exciter currents in dependence on the position of the pole wheel in relation to the stator. | 07-03-2014 |
| 20150349687 | Electric Power Generation and Distribution for Islanded or Weakly-Connected Systems - A dual-voltage power generation system includes a prime mover configured for adjustable speed operation and a doubly-fed induction generator driven by the prime mover and including a multi-phase stator winding and a multi-phase rotor winding. A first output terminal of the dual-voltage power generation system is electrically connected to the multi-phase stator winding, and a second output terminal is electrically connected to the multi-phase rotor winding. The dual-voltage power generation system further includes a first converter having an AC side connected to one of the multi-phase windings and an AC or DC side connected to one of the output terminals. The multi-phase stator winding has a different turns ratio than the multi-phase rotor winding and the first output terminal is electrically isolated from the second output terminal so that the generator has two isolated power supply outputs at different voltage levels in a first configuration. | 12-03-2015 |
| 20160079898 | Doubly-Fed, Variable-Speed, Dual-Voltage AC Generation and Distribution Systems - A generation and distribution system comprises an adjustable-speed prime mover and a doubly-fed asynchronous alternating-current (AC) generator driven by the prime mover and having a first poly-phase circuit, e.g., a stator, and a second poly-phase circuit, e.g., a rotor. The system further includes a first AC bus electrically coupled to the first poly-phase circuit and configured to deliver AC power at a first AC voltage to multiple loads, and a second AC bus configured to deliver AC power at a second AC voltage to another group of loads, the second AC voltage being lower than the first. Finally, the system includes a poly-phase transformer having first windings electrically coupled to the first poly-phase circuit and the first AC bus and having second windings electrically coupled to the second AC bus, and a poly-phase AC-to-AC electronic converter circuit electrically coupled between the second poly-phase circuit and the second AC bus. | 03-17-2016 |
| 20160094170 | PROTECTION SYSTEM FOR A POWER CONVERTER CONNECTED TO A DOUBLY FED INDUCTION GENERATOR - Protection system for a power converter connected to a doubly fed induction generator having a rotor and a stator. The power converter includes a grid-side-converter, a machine-side-converter, a DC link between both converters, a chopper connected to the DC link, and a hardware protection system connected to the rotor of the generator. The protection system includes a first control unit for controlling the hardware protection system depending on the voltage in the DC link, a second control unit for controlling the chopper depending on the DC link voltage, and a third control unit for controlling both converters. | 03-31-2016 |
| 20160099670 | METHOD AND ARRANGEMENT FOR DETERMINING LEAKAGE INDUCTANCES OF DOUBLE FED INDUCTION GENERATOR - A method and arrangement for determining leakage inductances of a double fed induction generator, DFIG, ( | 04-07-2016 |
| 20160380568 | VARIABLE SPEED CONSTANT FREQUENCY POWER GENERATOR INCLUDING PERMANENT MAGNET EXCITER - A variable speed constant frequency (VSCF) power generator includes a rotating direct current (DC) power source, rotating multi-phase generator main field windings to generate a rotating alternating current (AC) power, and a rotating inverter configured to control alternating current (AC) generator field windings in response to output AC power generated by the VSCF power generator and DC power from the rotating DC power source. At least one generator main field sensor outputs a generator main field feedback signal based on the rotating AC power applied to the rotating multi-phase generator main field windings. Stationary multi-phase generator armature windings output constant voltage constant frequency AC power controlled by the rotating AC power. An electronic rotating power line communication (PLC) controller generates a control signal that adjusts the rotating AC power based on the rotating generator feedback signal, where the output AC power is controlled by adjusting the rotating AC power. | 12-29-2016 |
| 322063000 | Plural excitation windings | 2 |
| 20130033238 | EXCITATION DEVICE - In an excitation device for stators of generators for high-induction measurement, the greatest possible compensation of the reactive power requirement is achieved. Depending on the size and energy requirement of the generator, a number of individual excitation modules with a corresponding number of individual excitation windings are provided, wherein a minimum necessary total excitation current can be supplied by superimposing the individual currents of the excitation windings. | 02-07-2013 |
| 20150333680 | DUAL COIL GENERATOR - A vehicle electrical system comprises a generator which provides electrical power to an electrical load. The generator includes two field coils. A first switch circuit is coupled with the first field coil and a second switch circuit is coupled with the second field coil. A control device, included in the electrical system, operates the first and second switch circuits to regulate the generator output voltage and, in the alternative, to further reconfigure and/or deactivate the switch circuits based on their operating states. The generator maybe further coupled with an electrical energy absorbing device and the control device maybe further configured to operate on a switch, coupled with the electrical energy absorbing device, in response to a shutdown condition, RPM, rate of change of RPM, and voltage transient. | 11-19-2015 |
| 322068000 | Short circuiting of field winding | 2 |
| 20100066314 | GENERATOR CONTROL UNIT WITH FAST FIELD DISCHARGE - A generator control unit for fast field discharge of a field coil is disclosed. The generator control unit comprises a control domain for detecting an excessive generator output voltage, a buck regulator with a feedback pin fed from the control domain, and an over-voltage protection switch connected in a field coil return path which is bypassed by a voltage limiting device. The control domain receives a point of regulation voltage feedback and upon detection of an over-voltage, emits a disable signal to cause the buck switch shut off along with the over-voltage protection switch. Thus dual breaking points are created at two ends of the field coil to dissipate the field charge quickly through the voltage limiting device. When the buck switch experiences a shorting failure, the over-voltage protection switch provides a second breaking point to allow the field discharge through the voltage limiting device, thereby controlling the field discharge with directly controlled over-voltage protection switch. | 03-18-2010 |
| 20160141988 | System and Method For Generator Main Field Energy Extraction - A system and method for controlling the main field current in an electrical generator is disclosed. The system can include a controller to sense the voltages and currents in the system to identify load faults. The system can also comprise one or more switches and an energy dissipator to absorb, store, or dissipate the main field current in the event of a load fault, such as a short circuit. In the event of a load fault, the controller can change the position of the one or more switches to redirect the main field current from the main field windings of the rotor to the energy dissipator. The energy dissipator can absorb or store the main field current significantly reducing the time required to stop the output current of the generator. | 05-19-2016 |
| 322069000 | Circuit interruption | 4 |
| 20180026473 | METHOD FOR OPERATING AN ACTIVE CONVERTER CONNECTED TO AN ELECTRIC MACHINE AND MEANS FOR THE IMPLEMENTATION THEREOF | 01-25-2018 |
| 322070000 | Continuous make and break | 3 |
| 20090033295 | CONTROLLER OF GENERATOR FOR VEHICLE - A controller of a generator ( | 02-05-2009 |
| 20100295518 | ROBUST DIGITAL VOLTAGE REGULATOR - A system and method are disclosed for regulating a generator controlled power signal. An exemplary embodiment of the system may include both a digital voltage regulator and an analog voltage regulator and a selector switch configured to switch modulation control between the digital and analog voltage regulators. A watchdog detection circuit may be included for detecting an upsetting event in the digital voltage regulator and may trigger switching of the generator excitation input voltage modulation from the digital voltage regulator to the analog voltage regulator. An exemplary embodiment of the method may include modulating the generator excitation input voltage using the digital voltage regulator, detecting an occurrence of an upsetting event in the digital voltage regulator, disabling the digital voltage regulator, and switching modulation of the generator excitation input voltage to the analog voltage regulator. | 11-25-2010 |
| 20110193533 | Circuit and Method for De-Energizing a Field Coil - A circuit includes a first half bridge including a first controllable semiconductor switch and a first diode. The first controllable semiconductor switch is coupled between a first constant supply potential and a center tap of the first half bridge. The first diode is coupled between the center tap and a constant reference potential. A second half bridge includes a second diode and a second controllable semiconductor switch. The second diode is coupled between a second constant potential higher than the first potential and a center tap of the second half bridge. The second controllable semiconductor switch is coupled between the center tap and the constant reference potential. Driver circuitry controls the conducting state of the first and the second semiconductor switch thus controlling the current flow through a field connectable between the center taps. | 08-11-2011 |
| 322075000 | Control by circuit impedance | 3 |
| 20090108816 | OUTPUT CONTROL APPARATUS OF GENERATOR - Output waveform of the generator is improved through stabilization of field current by removing flywheel diode used to be required for automatic voltage regulator. Output electric current of excitation winding | 04-30-2009 |
| 322079000 | Unidirectionally conductive | 2 |
| 20100134074 | EXCITER ASSEMBLIES - An exciter assembly for supplying a field current to the rotor windings of a superconducting synchronous machine includes a pulse transformer having a stationary primary winding and a secondary winding that is mounted to the rotor of the superconducting synchronous machine for rotation therewith. A switched mode power supply supplies a pulsed voltage to the primary winding of the pulse transformer. The pulsed voltage developed at the secondary winding of the pulse transformer is supplied to the rotor windings through a rectifier semiconductor device and a pair of transfer leads. The rotor windings and a flywheel semiconductor device are located inside a cryogenic chamber or cryostat. The flywheel semiconductor device is connected in parallel with the rotor windings and operates in unison with the rectifier semiconductor device in order to provide synchronous rectification of the switched mode power supply output. The switched mode power supply and both the primary and secondary windings of the pulse transformer are located outside the cryostat. | 06-03-2010 |
| 20170237373 | POWER GENERATION SYSTEM | 08-17-2017 |
| 322086000 | Plural sources of excitation voltage | 7 |
| 20090021225 | DEVICE FOR SUPPLYING THE INDUCTOR OF A ROTATING ELECTRICAL MACHINE - Device for supplying the inductor ( | 01-22-2009 |
| 20100007313 | METHOD AND APPARATUS FOR CONTROLLING EXCITATION - Excitation control circuitry for a synchronous generator is disclosed. The synchronous generator is of a type comprising a main machine ( | 01-14-2010 |
| 20100171471 | Time lag reduction circuit for alternating current generator and electric drive machine using same - A field current control circuit for an alternating current generator includes a first voltage source and a time lag reduction circuit, which further includes a generator field that is in selective electrical communication with an energy storage component that is in electrical communication with a time lag reduction voltage source. The time lag reduction circuit may include an electronic controller and be a part of an electric drive machine that receives an operator acceleration command and thereby controls the electrical communication between the energy storage component and the generator field of the time lag reduction circuit. When the energy storage component and generator field are in electrical communication, the current passing through the generator field increases from a starting current to a target current with a reduced time lag compared to predecessor generators. | 07-08-2010 |
| 20110050183 | STATIC EXCITER OF A FIELD WINDING AND METHOD FOR OPERATING THE SAME - A static exciter of a field winding includes a rectifier connected to an electric grid and to the field winding; a unidirectional electronic switch connected in series with the rectifier; a capacitor bank; and a further switch disposed between the unidirectional electronic switch and the capacitor bank. Exciter also includes a control unit connected to the further switch and configured to close the further switch when a grid voltage drops below a first prefixed voltage value so as to connect the capacitor bank to the field winding and configured to open the further switch when the grid voltage exceeds a second prefixed voltage value so as to disconnect the capacitor bank from the field winding and so as to supply energy to the field winding from the capacitor bank for a time period. | 03-03-2011 |
| 322087000 | Dynamoelectric source | 2 |
| 20100231181 | NOVEL STARTER-GENERATOR WITH IMPROVED EXCITATION - An electrical power system may comprise a main generator with a rotor having field windings and at least one embedded permanent magnet. A generator control unit (GCU) may be connected to receive excitation current produced by the main generator with flux from the at least one permanent magnet. An exciter generator may be connected to be provided with excitation from the GCU. The exciter generator may provide excitation current to the field windings of the main generator. The main generator may produce output current from flux from the field windings and the at least one permanent magnet. | 09-16-2010 |
| 20120242295 | Method and arrangement for controlling an operation of an electric energy production facility during a disconnection to a utility grid - A method is provided for operating an electric energy production facility during a fault in a utility grid to which energy is to be delivered. The energy production facility includes at least one wind turbine. The method includes disconnecting the utility grid from the wind turbine. The method further includes connecting an external generator via a cable to an auxiliary equipment of the wind turbine, to deliver active power to the auxiliary equipment. The cable is connected to a converter of the wind turbine the converter supporting reactive power. A corresponding arrangement also provided. | 09-27-2012 |
| 322088000 | Battery source | 1 |
| 20110089911 | Integrated generator field flash - The present invention provides an engine coupled to a generator, the generator being in communication with an automatic voltage regulator. The automatic voltage regulator has an integrated field flash circuit. Further, a controller may be in communication with the field flash circuit and the controller may control an output of the field flash circuit. | 04-21-2011 |
