公开(公告)号：US4528557A

公开(公告)日：1985-07-09

申请号：US371507

申请日：1982-04-23

申请人： Kenneth E. Braun

发明人： Kenneth E. Braun

IPC分类号： H01R39/58 ,  G08B21/00

CPC分类号： H01R39/58

摘要： A motor brush wear indicator includes a probe embedded in a brush and connected in the primary circuit of a transformer for completing the secondary circuit when the brush has worn to a predetermined degree. An oscilator is coupled to the secondary of the transformer which in turn is connected to the gate of an SCR for providing a gate signal when the primary circuit is completed. A relay is connected to the anode-cathode circuit of the SCR for operating an indicating device when the SCR becomes conductive.

摘要翻译： 电动机刷磨损指示器包括嵌入在电刷中并连接在变压器的初级电路中的探针，用于当刷子磨损到预定的程度时完成次级电路。 振荡器耦合到变压器的次级，变压器的次级又连接到SCR的栅极，以在主电路完成时提供栅极信号。 当SCR变为导通时，继电器连接到SCR的阳极 - 阴极电路，用于操作指示装置。