Power converter for a switched reluctance motor

Details Power converter for a switched reluctance motor Power converter for a switched reluctance motor

1990-10-05

1992-05-19

Smith, Jr., David

Electricity: motive power systems

Synchronous motor systems

Hysteresis or reluctance motor systems

H02P 602, H02P 540

Patent

active

051151812

ABSTRACT:
Power conversion apparatus (10) for an n-winding switched reluctance motor (M). A rectifier circuit (12) rectifies line voltage supplied to the motor. A switching circuit (14) supplies, at any one time, electrical energy to the motor winding most capable of converting it to mechanical work. A storage capacitor (C1) stores any unconverted portion of the energy and returns it to the winding during subsequent cycles. The switching circuit provides a substantially long conduction period 2 (.theta.) for supplying electrical energy to the motor during each line voltage cycle. This permits use of a substantially smaller energy storage capacitor and results in a higher input power factor for circuit operation. Circuits for precharging the storage capacitor are eliminated. The switching circuit is capable of more modes of operation than previous circuits, while using fewer components, and therefore provides a lower cost design.

REFERENCES:
patent: 3639818 (1972-02-01), Wiart
patent: 4140955 (1979-02-01), Drabing
patent: 4684867 (1987-08-01), Miller et al.

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