Brush structure for motor in which wear-related parameters of th

Details Brush structure for motor in which wear-related parameters of th Brush structure for motor in which wear-related parameters of th

1996-04-18

1998-04-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310245, 310251, 310252, H02K 1300, H02P 706

Patent

active

057448906

ABSTRACT:
A brush structure for a motor is provided for realizing an equalization of wear of brushes without causing an early wear of a specific brush while not necessitating a complicated conduction controlling device. A first brush, which is one of four brushes, conducted at both Lo mode and Me mode is formed to have a larger sliding contact area for contacting a commutator slidably compared with a sliding contact area of a second brush which is conducted at Hi mode only. Current density in the first brush at Lo mode and Me mode becomes smaller than current density at Hi mode.

REFERENCES:
patent: 4225798 (1980-09-01), Barrett
patent: 4314848 (1982-02-01), Todoroki et al.
patent: 4799957 (1989-01-01), Vogel
patent: 4845396 (1989-07-01), Huber
patent: 4910790 (1990-03-01), Kershaw
patent: 5227688 (1993-07-01), Gotoh
patent: 5311615 (1994-05-01), Couetoux
patent: 5485049 (1996-01-01), Shannon et al.

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