Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Patent
1991-03-28
1991-12-24
Shoop, Jr., William M.
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
318254, H02P 540
Patent
active
050756109
ABSTRACT:
A control circuit for a switched reluctance motor is provided with a connection between a second end of each stator winding and a first end of an associated other winding. The purpose of this connection is to permit the flow of current from a phase winding to an energy storage device following the disconnection of the phase winding from a primary power source. Because of the inductive characteristic of the phase windings in a switched reluctance motor, the current flow through the winding does not immediately cease when the winding is disconnected from the power source. Instead, the inductive characteristic resists the immediate cessation of current flow following the opening of an associated switch. That continued current flow is directed to an energy storage device, such as a capacitor, for the purpose of raising the voltage at the first, or input, end of another stator winding. This increased voltage potential at the first end of the other stator winding assists the initiation of current flow through that stator winding when its switch is later closed for the purpose of energizing the winding. Alternative embodiments of the present invention include the directing of the continued current flow to more than one other winding to permit bi-directional rotation of the motor rotor.
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Cabeca John W.
Honeywell Inc.
Lanyi William D.
Shoop Jr. William M.
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