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| Number | Title | Issue Date |
| 7372232 | Apparatus for drive control, power conversion, and start-up control in a PMBDCM or two-phase SRM drive system A power converter for a switched reluctance motor (SRM) or a permanent magnet brushless direct current (do) motor (PMBDCM) may include a front-end boost partial circuit for connecting with a first phase winding of the motor to form a front-end boost circuit and a ba... | 05/13/2008 |
| 7312550 | Architecture for electric machine In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a mul... | 12/25/2007 |
| 7288923 | Voltage-limited electric machine An electric alternator 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 around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7279863 | Method and apparatus for detecting excitation position of SRM by comparison of detected current Disclosed is a method and apparatus for detecting an excitation position of an SRM by comparison of detected currents. The method includes detecting a current by applying a first test voltage to each phase of the SRM, detecting a current by applying a second test vo... | 10/09/2007 |
| 7271564 | Method, apparatus, and system for drive control, power conversion, and start-up control in an SRM or PMBDCM drive system A power converter for a switched reluctance motor or a permanent magnet brushless direct current (dc) motor may include first and second partial circuits for forming multiple conduction circuits in cooperation with first and second phase windings of the motor. The c... | 09/18/2007 |
| 7268516 | Circuit for use with switched reluctance machines A switched reluctance machine is energized by phase circuits with four active switches, for example MOSFETs, arranged in a bridge configuration. The switches are capable of conducting current in both a first direction and a second direction and are capable of operat... | 09/11/2007 |
| 7265471 | Apparatus and process for generating energy Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into mechanical force or electrical energy. ... | 09/04/2007 |
| 7237748 | Landing gear method and apparatus for braking and maneuvering Aircraft landing gear comprised of a wheel hub motor/generator disks stack, includes alternating rotor and stator disks mounted with respect to the wheel support and wheel. The wheel hub motor/generator can provide motive force to the wheel when electrical power is ... | 07/03/2007 |
| 7226018 | Landing gear method and apparatus for braking and maneuvering Aircraft landing gear comprised of a wheel hub motor/generator disks stack, includes alternating rotor and stator disks mounted with respect to the wheel support and wheel. The invention can provide motive force to the wheel when electrical power is applied, e.g. pr... | 06/05/2007 |
| 7215098 | Electrical generating system having capacitative control of alternator regulation The invention provides an electrical generating system comprising an AC electrical generator (G) having an output, and a capacitor arrangement (Ca) provided at the output of the generator and arranged so as to offset a drop of voltage from no-load to full-load occur... | 05/08/2007 |
| 7148649 | Hybrid-electric vehicle having a matched reactance machine A hybrid-electric vehicle including a matched reactance machine power generation system (MRMPGS). The MRMPGS comprises a permanent magnet rotor type machine having a selected back electromotive force (BEMF) voltage value and a selected machine inductance value. The ... | 12/12/2006 |
| 7075290 | Tachometer apparatus and method for motor velocity measurement A method and apparatus for determining the velocity of a rotating device is described herein. The apparatus includes a magnet assembly affixed to a rotating shaft of a rotating device and a circuit assembly. The circuit assembly includes a circuit interconnection ha... | 07/11/2006 |
| 7071659 | Closed loop control of excitation parameters for high speed switched-reluctance generators The method is directed to controlling a switched reluctance generator operating in a high speed single pulse mode. The turn-off angle is selected according to an analytic fit optimal efficiency curve and the turn-on angle is used as the variable parameter to control... | 07/04/2006 |
| 7049786 | Unipolar drive topology for permanent magnet brushless DC motors and switched reluctance motors A unipolar drive includes a booster, an energy storage module, and a unipolar inverter. The booster increase a voltage received from a power supply to produce an energy output. The energy storage module store at least some of the energy output by the booster. The un... | 05/23/2006 |
| 7002317 | Matched reactance machine power-generation system A system and method is described for using a matched reactance machine power generation system (MRMPGS) to provide a constant-voltage power for an electric distribution system. The system and method include a permanent magnet rotor type machine without a field windi... | 02/21/2006 |
| 6965183 | 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 us... | 11/15/2005 |
| 6954019 | Apparatus and process for generating energy Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into mechanical force or electrical energy. ... | 10/11/2005 |
| 6940251 | Decoupling of cross coupling for floating reference frame controllers for sensorless control of synchronous machines A synchronous motor controller and method of controlling a synchronous motor without using rotor position sensors are provided. In a floating synchronous reference frame controller, phase currents are measured and a current Park vector is determined. The error betwe... | 09/06/2005 |
| 6920023 | 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 ... | 07/19/2005 |
| 6661206 | Soft chopping for switched reluctance generators The switched reluctance machine providing soft chopping in the output current controls the voltage across the phase winding. When the current through the phase winding in the generating mode reaches a first predetermined value, the voltage across the phas... | 12/09/2003 |
| 6628105 | Operation of switched reluctance drive systems from dual voltage sources A switched reluctance drive is supplied from a first voltage source (V1) during an idle period, in which it transfers energy to a second voltage source (V2). The machine is subsequently run at high power from the second source (V2), so that the first sour... | 09/30/2003 |
| 6476571 | Multiple power source system and apparatus, motor driving apparatus, and hybrid vehicle with multiple power source system mounted thereon In a multiple power source system of the present invention that has an inverter connected to a reactance, such as three-phase coils in a motor, a high voltage battery is connected with a low voltage battery via one transistor (Tr2) and one diode (D2) incl... | 11/05/2002 |
| 6066941 | Switching alternator system A method and apparatus for controlling AC power from the stator of an alternator in which groups of windings have various numbers of turns and various numbers of poles per winding can be connected in series to achieve optimum power generation at one RPM a... | 05/23/2000 |
| 5936386 | Method of linearizing the performance of switched reluctance generators A method of linearizing the output performance of a switched reluctance generator, comprises the steps of exciting the switched reluctance generator during a first phase of operation at a turn-on angle which need not be accurately calculated to produce th... | 08/10/1999 |
| 5859525 | Alternator rectification, regulation, and control circuit A system for rectifying and regulating the flow of electrical power from a multi-winding alternator to a load such as a vehicle battery automatically changes the effective connection of the alternator windings to obtain maximum output power over a wide sp... | 01/12/1999 |
| 5757164 | Apparatus for supplying electric power to electrically heated catalysts attached to the exhaust gas passage of a vehicle An apparatus for supplying electric power to heating devices of a vehicle, making it possible to utilize the maximum amount of electric power generated by an alternator when a plurality of electrically heated catalysts mounted on the vehicle are to be sup... | 05/26/1998 |
| 5705918 | Switched reluctance generators A switched reluctance generator is controlled such that flux growth in a phase winding occurs at a faster rate during the initial part of the phase inductance cycle and at a second, slower rate during the subsequent part of the phase inductance cycle. The... | 01/06/1998 |
| 5510696 | Zero current switching between winding sets in a permanent magnet alternator having a split winding stator An apparatus for selectively rectifying one of a pair of output voltages associated with one of a a pair of output winding sets of a polyphase alternating current generator has a single controlled bridge rectifier selectively coupled to one of the winding... | 04/23/1996 |
| 5404091 | Switched reluctance generator system with self-excitation capability during load faults A switched reluctance generator system, including a converter for coupling a dc voltage via a dc excitation bus to a switched reluctance generator and thereby providing excitation power thereto, has a separate generator bus for providing the output voltag... | 04/04/1995 |
| 5381081 | Switched reluctance generator for generating AC power A switched reluctance generator system provides an ac output voltage through only one stage of power conversion. The system includes a converter for coupling a dc voltage via a dc excitation bus to a switched reluctance generator and thereby providing exc... | 01/10/1995 |
| 5327069 | Switched reluctance machine including permanent magnet stator poles A switched reluctance machine comprising a housing, a stator attached to the housing and a rotor mounted within the housing. The stator including teeth wound with electrical coils which are connected to form phase windings. The rotor comprising a series o... | 07/05/1994 |
| 5289107 | Switched reluctance generator system with fault recovery capability A switched reluctance generator system, including a converter for coupling a dc voltage via a dc excitation bus (or excitation nodes) to a switched reluctance generator and thereby providing excitation thereto, has a separate generator bus for providing t... | 02/22/1994 |
| 5254936 | Dual generator electrical system A motor vehicle power supply system for supplying current to the direct voltage loads on a motor vehicle. The system has two alternating generators which are driven by the engine of the motor vehicle. The output windings of the respective generators are c... | 10/19/1993 |
| 5182510 | Charging system A system for charging a battery from a generator including a rectifier regulator wherein the regulated voltage is stepped up to compensate for voltage drops in the cable connecting the rectifier regulator to the battery.... | 01/26/1993 |
| 5013991 | Multi-voltage alternator with integral bank switched bridge A silicon controlled rectifier is connected between the output of each stator winding of a conventional alternator and a terminal of a lower voltage battery, and a control electrode of each silicon control rectifier is connected to a switching control cir... | 05/07/1991 |
| 4958119 | Voltage regulators for permanent magnet alternators A voltage regulator for an internal combustion engine having a permanent magnet alternator and utilizing an SCR/diode bridge rectifier includes crowbar SCR overvoltage protection means. To assure that the crowbar SCR has an adequate period in which to coo... | 09/18/1990 |
| 4852540 | High-efficiency charging and regulating system A high efficiency charging and regulating system charges a battery and regulates a voltage delivered to the battery. An alternator having a rotor with at least one magnet thereon and a stator in close proximity to the rotor has at least one alternator coi... | 08/01/1989 |
| 4825139 | Electric power supply unit, in particular for a motor vehicle, and an electric rotary machine for such a unit The electric power supply comprises an electric rotary machine intended to be driven by an engine in order to supply electrical energy to a battery and/or to various user units, and rectifier means combined with the machine for obtaining direct current. T... | 04/25/1989 |
| 4816736 | Polyphase alternator and dual voltage battery charging system for multiple voltage loads A 24/12 volt battery power supply for a vehicle includes two 12 volt batteries connected in series, and having first and second 24 volt terminals to the opposite ends of the batteries and a 12 volt terminal to the center common connection of the batteries... | 03/28/1989 |
| 4748395 | Dual voltage electrical system A dual voltage motor vehicle electrical system wherein a pair of batteries are connected in series across the direct voltage output terminals of a bridge rectifier that is connected to a polyphase output winding of an alternating current generator. First ... | 05/31/1988 |
