Motor power control circuit for A.C. induction motors

Details Motor power control circuit for A.C. induction motors Motor power control circuit for A.C. induction motors

1981-08-28

1984-03-27

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Power-factor control

318812, H02P 540

Patent

active

044397186

ABSTRACT:
A motor power control of the type which functions by controlling the power factor wherein one of the parameters of power factor current "on" time is determined by the "on" time of a triac through which current is supplied to the motor, and wherein, by means of a positive feedback circuit, a wider range of control is effected.

REFERENCES:
patent: 3497779 (1970-02-01), Eisele
patent: 4052648 (1977-10-01), Nola
patent: 4229690 (1980-10-01), Avidan
patent: 4361792 (1982-11-01), Davis, Jr. et al.
patent: 4387329 (1983-06-01), Harlow
patent: 4388578 (1983-06-01), Green et al.
"Improved Power Factor Controller", N.A.S.A., G. G. Marshall, Space Flight Center, NASA Tech. Briefs, Summer 1980, vol. 5, No. 2, MFS-25323.

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