Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1990-04-03
1991-08-20
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
307135, 318775, H02P 736
Patent
active
050417754
ABSTRACT:
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.
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Honeywell Inc.
Smith Jr. David
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