Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1987-01-23
1988-06-21
Ro, Bentsu
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02P 602
Patent
active
047527242
ABSTRACT:
A control circuit for a collectorless d.c. motor, without a commutation sensor, and comprising a stator with a multiphase system and a permanent-magnet rotor. The commutation state of the motor depends on the voltages induced in the stator windings. A comparison signal is generated which indicates whether the sign of that winding voltage which is not connected to a direct current source by means of the circuit electronic switching elements is in conformity with a predetermined sign which depends on the instantaneous commutation state. This comparison signal is inhibited during those time intervals in which transient effects which may cause spurious zero crossings occur in the windings as a result of the electronic switching elements being turned off. The switching elements are always switched one commutation step further if the comparison signal does not have the appropriate sign.
REFERENCES:
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patent: 3916273 (1975-10-01), Grunleitner et al.
patent: 3942083 (1976-03-01), Takahashi et al.
patent: 4238717 (1980-12-01), Knight et al.
patent: 4558264 (1985-12-01), Weischedel
patent: 4641066 (1987-02-01), Nagata et al.
patent: 4654566 (1987-03-01), Erdman
Doring Gunter
Radziwill Wolfgang M. J.
Franzblau Bernard
Ro Bentsu
Treacy David R.
U.S. Philips Corporation
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