AC Motor controller

Details AC Motor controller AC Motor controller

1978-11-06

1981-03-31

Truhe, J. V.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318812, 363 41, 307241, H02P 528, H02P 318, H03K 1756, H02M 112

Patent

active

042596300

ABSTRACT:
A controller for achieving quiet operation of an AC motor utilizes an arrement of force-commutated, controlled rectifiers that are gated in a manner that results in the motor windings being energized with a preselected number of adjustable width, current pulses during each half cycle of the power supply. In the interval between pulses the motor winding is short circuited so that the motor current remains continuous upon commutation between the "on" and "off" states. The number of pulses are selected so as to reduce those magnetic field stress harmonics that are responsible for the excitation of vibration and noise.

REFERENCES:
patent: 3207974 (1965-09-01), McMurray
patent: 3777250 (1973-12-01), Kaeser et al.
patent: 3832624 (1974-08-01), Gilmore et al.
patent: 4047083 (1977-09-01), Plunkett
patent: 4123692 (1978-10-01), Gilmore et al.
patent: 4128793 (1978-12-01), Stich

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