Notched carbon brush for rotating electric machines

Details Notched carbon brush for rotating electric machines Notched carbon brush for rotating electric machines

1990-12-17

1992-01-21

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310220, 310233, 310239, 310251, H02K 1300

Patent

active

050830554

ABSTRACT:
The trailing edge of a carbon brush for commutating electric machines has a notch flanked by an ear on either side. The brush can include one or more wafers. The angular thickness of the trailing brush wafer at the notch is such that the brush does not touch more than n commutator contacts at a time. However, the brush wafer is thick enough at the ears to touch n+1commutator contacts at a time. The relatively high resistance of the ears improves commutation.

REFERENCES:
patent: 752634 (1904-02-01), Young
patent: 1757611 (1930-05-01), Binney
patent: 3171050 (1965-02-01), Gordon
patent: 3484686 (1969-12-01), Wade
patent: 3980914 (1976-09-01), Cunningham
patent: 4739209 (1988-04-01), Sherman

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