Electrical motor with choke coils on a common core

Details Electrical motor with choke coils on a common core Electrical motor with choke coils on a common core

1992-12-28

1994-04-26

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 51, 310220, 361 23, H02K 510, H02K 1100

Patent

active

053069749

ABSTRACT:
An electrical motor includes a ground brush connected to ground, first and second supply brushes connected to first and second supply lines and adapted to cause the motor to rotate at first and second speeds, and an interference suppression device comprising a common core, a first coil connected in series between the first supply brush and the first supply line and a second coil connected in series between the second supply brush and the second supply line. The space required by the device in the motor casing is less than with the conventional arrangement of two individual chokes and can provide improved noise suppression due to magnetic coupling between the two coils.

REFERENCES:
patent: 2157430 (1939-05-01), Partz
patent: 4093978 (1978-06-01), Plumer, Jr.
patent: 4384223 (1983-05-01), Zelt
patent: 4408171 (1983-10-01), Akino et al.
patent: 5184045 (1993-02-01), Im
patent: 5194769 (1993-03-01), Ade et al.

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