Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1992-09-23
1994-02-08
Ro, Bentsu
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02P 602
Patent
active
052851354
ABSTRACT:
A circuit and method are provided for automatically adjusting a commutation delay from events indicating a position of a polyphase dc motor. The circuit includes a driver to supply drive current to selected stator coils of said motor. A sequencer is connected to control the driver to apply drive current to selected motor coils to rotate the motor. Motor position detecting circuitry is connected to detect the events indicating the position of the motor. A commutation delay circuit is connected to increment the sequencer in response to the detection of the events indicating the position of the motor detected by the motor position detecting circuitry. A circuit for adjusting the delay of said commutation delay circuit between each event and each sequencer commutation provides optimum motor commutation for maximum power efficiency.
According to the method, drive current is supplied to selected stator coils of said motor in predetermined commutated sequences to rotate the motor. Events are detected indicating the position of the motor, and the delay between each position indicating event and each commutation sequence is automatically adjusted to provide optimum motor commutation for maximum power efficiency.
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Carobolante Francesco
Pace Ermanno
Rohrbaugh Mark E.
Bachand Richard A.
Jorgenson Lisa K.
Ro Bentsu
Robinson Richard K.
SGS-Thomson Microelectronics Inc.
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