Speed control for multitap induction motor

Details Speed control for multitap induction motor Speed control for multitap induction motor

H - Electricity

02

P

318/111

H02P 7/36 (1990.01)

Patent

CA 1303668

SPEED CONTROL FOR MULTITAP INDUCTION MOTOR ABSTRACT OF THE DISCLOSURE A control circuit for controlling the speed of a tapped winding motor that includes a set of motor speed selection relays, and a normally open relay connected in series with the set of motor speed selection relays. The motor speed selection relays are connected to the tapped windings of the motor for varying speed of the motor. A microprocessor controls energization of the relay windings upon request for a change in motor speed so that the normally open relay is open before and during any change of state of the motor speed selection relays corresponding to the requested change in motor speed. 0710f 19H88

608965

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