Noise suppression circuit for parallel resonant motor

Details Noise suppression circuit for parallel resonant motor Noise suppression circuit for parallel resonant motor

1987-08-24

1988-03-29

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

318793, 318795, H02K 1100, H02P 144

Patent

active

047346019

ABSTRACT:
A noise suppression circuit is provided for an alternating current motor which has a capacitor connected in parallel with one of the windings to form an LC resonant circuit at the operating frequency of the motor. The motor includes first and second windings of substantially the same wire size connected in series on the stator core. The LC resonant circuit formed by the capacitor and the winding across which it is connected improves the efficiency of operation of the motor. To prevent chattering and noise from occuring upon disconnection of power from the windings, separate switches are used for applying alternating current power to the windings and to the capacitor; so that when power is disconnected, the capacitor is isolated from the winding across which it is connected. At the same time, a power dissipation resistor connected in parallel with the capacitor permits it to discharge.

REFERENCES:
patent: 1882733 (1932-10-01), Ballman
patent: 2028230 (1936-01-01), Lyden
patent: 2034950 (1936-03-01), Lyden
patent: 2630540 (1953-03-01), Hewlett, Jr.
patent: 2836780 (1958-05-01), List, Jr. et al.
patent: 2922943 (1960-01-01), Rupp
patent: 3036255 (1962-05-01), Lewus
patent: 3573579 (1971-04-01), Lewus
patent: 3916274 (1975-10-01), Lewus
patent: 4348626 (1982-09-01), London
patent: 4642545 (1987-02-01), Lewus
patent: 4675565 (1987-06-01), Lewus

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