AC Motor drive

Details AC Motor drive AC Motor drive

1978-08-15

1980-12-30

Rubinson, Gene Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318810, H02P 742

Patent

active

042426260

ABSTRACT:
The drive circuit operates a shaded pole motor having in the disclosed embodiment three windings of turns N, N/2 and N/2. The control is basically two-speed control with the lower speed operation being adjustable by means of the drive circuit and with the high speed operation being directly from the AC line. The drive circuit includes a clock, frequency adjustment means, power inverters and unilateral means for limiting power consumption.

REFERENCES:
patent: 3321688 (1967-05-01), Von Delden
patent: 3416057 (1968-12-01), Froyd et al.
patent: 3543114 (1970-11-01), Tadakuma et al.
patent: 3609490 (1971-09-01), Keranen
patent: 4080554 (1978-03-01), Nordby

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