Drive circuits for direct current electric motors

Details Drive circuits for direct current electric motors Drive circuits for direct current electric motors

H - Electricity

02

P

318/114, 318/60

H02P 7/28 (2006.01) H02P 1/22 (2006.01) H02P 7/282 (2006.01)

Patent

CA 1069170

ABSTRACT OF THE DISCLOSURE A circuit comprising a direct current motor having two parallel oppositely wound field windings, a pair of controlled rectifiers, each connected in series with a respective one of the said field windings. A commutating capacitor couples the controlled rectifiers, and an astable multivibrator are provided for applying gating signals to the two controlled rectifiers alternately for causing con- duction of direct current through the two field windings in alternate complementary conduction periods.

264734

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