三相异步电动机可控硅降压起动的新型触发电路

The New Type Trigger Circuit of SCR Reduced voltage strting For Threphase Asynchronous Motor

本文介绍一种国内外较为先进,且切实可行的三相异步电动机可控硅降压起动的触发电路。这种电路采用双精密单稳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。

This paper introduces a advanceder practical trigger circuit of SCR reduced voltage trig- gering for threephase asynchronous motor.In the circuit the form link of phase shift pulse is made up by dual prectision monostoble muitivibrator.The time control link of reduced voltage barfer is made up by the RC circuit and the comparator voltage.