介绍三相异步电动机可控硅降压起动的触发电路

Introducing a Trigger Circuit for SCR Stepping Down to Start Three-Phase Asynchronous Motor

本文介绍一种国内外较为先进,且切实可行的塑料圆型编织机的三相异步电动机可控硅降压起动的触发电路,电路采用双精密单稳态多谐振荡器作为移相脉冲的形成环节,并用RC电路与电压比较器组成降压缓冲的时间控制环节。

In this paper, we introduce a new trigger circuit which is fairly advanced and feasible for SCR stepping down to start the three—phase asynchronous motor that servrs the plastics round knitting-machine. It adopts a dual precision monostable multivibrator as the link of phase'shift pulse shaping, with RC circuit and voltage comparator as the timing-control link that steps down to buffer.