Method for powering an electronically switched variable reluctance motor, and power supply circuit therefor
Patent 6014001 Issued on January 11, 2000. Estimated Expiration Date: 
July 22, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 22, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPower converter for a switched reluctance motor Driver circuit for electric actuator Power electronic interface circuits for batteries and ultracapacitors in electric vehicles and battery storage systems Drive circuit for a switched reluctance motor with improved energy recovery using a common dump capacitor and recovering phase circuit Patent #: 5742146 InventorAssigneeApplicationNo. 117069 filed on 07/22/1998US Classes:318/701, Hysteresis or reluctance motor systems318/254, SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS318/448Anti-huntingExaminersPrimary: Ro, BentsuAttorney, Agent or FirmForeign Patent References
International ClassesH02P 005/05H02P 003/06 Foreign Application Priority Data1996-01-22 FRAbstractA method for powering an electronically switched variable reluctance motor (100) from a single-phase AC voltage source (17) is disclosed. Each phase of the motor is sequentially subjected to a magnetizing sequence, a demagnetizing sequence and an energy transfer to a storage capacitor (C) common to all the phases. Feedback sequences (R) in which the energy stored in the storage capacitor (C) is returned to the rectifier stage (15) are performed by controlling a chopping switch (TH) connected in series to the storage capacitor (C). The method includes a step of monitoring the energy returned to the rectifier stage (15) in order to correct instability in the rectified power supply current (Ia) relative to a reference current wave, and modulating the cyclical chopping ratio around a substantially constant mean value. The method is useful for powering household appliances.Other References
Field of SearchSELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORSCONSTANT MOTOR CURRENT, LOAD AND/OR TORQUE CONTROL Control of motor load or device driven POWER FACTOR CONTROL OF ARMATURE OR LINE CIRCUIT Anti-hunting "Step-by-step" motors in closed-loop servos OPEN-LOOP STEPPING MOTOR CONTROL SYSTEMS Hysteresis or reluctance motor systems | |
