Power control circuit for induction motor

Details Power control circuit for induction motor Power control circuit for induction motor

1981-04-21

1983-04-05

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318729, 318812, H02P 540

Patent

active

043792588

ABSTRACT:
A control circuit 3 for an induction motor 2 detects the voltage applied across the motor winding and the current flowing therethrough. The supply power and the feedback power are determined from the detected voltage and current and are supplied to a computing unit whose output controls a voltage regulator such that the voltage applied across the motor winding results in a fixed, predetermined ratio between the effective and apparent powers to maximize the motor efficiency and to minimize the motor's power consumption regardless of variations in the line voltage and fluctuations in the motor load.

REFERENCES:
patent: 3441823 (1969-04-01), Schlabach
patent: 3601673 (1971-08-01), Mason
patent: 4039913 (1977-08-01), Clegg
patent: 4117408 (1978-09-01), Comstedt

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