Fan motor control system

Electricity: motive power systems – Induction motor systems – Primary circuit control

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318817, H02P 318

Patent

active

047514515

ABSTRACT:
This invention relates to motor speed control circuits employing capacitors. Two windings of a motor are connected in parallel to a neutral phase of an alternating current source. Each coil of the motor may be connected to the live phase of the source whereby the rotation direction of the motor may be altered. Three socket terminals are connected to each winding. A capacitor pack has three pins with two capacitors connected between a common pin and the two remaining pins. The pins of the capacitor pack can be inserted into the sockets in three different ways whereby either capacitor or the two capacitors in parallel can be connected across the windings to vary thereby the speed and performance characteristics of the motor.

REFERENCES:
patent: 2847629 (1958-08-01), Schaefer
patent: 3440491 (1969-04-01), Tenenbaum et al.
patent: 3988709 (1976-10-01), McKinnon et al.
patent: 3996499 (1976-12-01), Gary et al.
patent: 4215303 (1980-07-01), Brimer
patent: 4446416 (1984-05-01), Wanlass
patent: 4555654 (1965-11-01), Spradling et al.
Japanese Abstract for Condenser Motor 58-79496, May 13, 1983.
Japanese Abstract for Capacitor Motor, 58-29393, Feb. 21, 1983.

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