专利汇可以提供Solid state motor starting control专利检索,专利查询,专利分析的服务。并且An improved solid state motor starting switch is disclosed, which switch is adaptable to single-phase induction motors of the split-phase, capacitor-start, or capacitor-start capacitor-run type, the switch circuit utilizing bidirectional semiconductor devices and a running winding current sensitive control device such as a bias resistor, inductor or transformer, for operating the semiconductor device, typically one or more triacs, to ON and OFF states, respectively, during motor starting and motor running conditions. Two rectifier or zener diodes, parallel connected back-to-back, are disposed in series connection in the gate circuit of the semiconductor switch such that the control device develops a control voltage in excess of the diode forward voltage during motor starting. During normal running, the control voltage from the control device falls below the diode forward voltage drop in the PN junction region such that leakage current is very small in order to reduce the triac gate voltage to a correspondingly small value during motor running conditions.,下面是Solid state motor starting control专利的具体信息内容。
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