Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-01-09
2007-01-09
La, Anh V. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S679000, C340S664000, C340S686100, C310S242000
Reexamination Certificate
active
10826292
ABSTRACT:
The brush abrasion detector is unnecessary to provide any detecting element for detecting limit of abrasion of a brush in the proximity of the brush. The brush abrasion detector includes: a brush located being slidably press-fitted to a slip ring provided at an end portion of a field winding of a generator, and supplying an excitation current from a battery to the field winding; a current detection circuit for detecting a current value flowing through the field winding via the brush; an output voltage detection circuit for detecting an output voltage value from the generator; and a brush abrasion determination circuit for determining abrasion state of the brush based on a current value detected by the current detection circuit or an output voltage value detected by the output voltage detection circuit.
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Itou Yoshihito
Iwatani Shiro
La Anh V.
Mitsubishi Denki & Kabushiki Kaisha
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