可控硅零电压开关减噪原理及实现

Theory and Realization of Zero Voltage Switch Reducing Noise

工业现场电器开关的闭合、关断通常会引起高频振荡 ,给控制带来不利影响 ,而在交流电压为 0时 ,进行开、关操作则不会产生高频干扰 .针对工业现场这一情况 ,笔者设计了零电压开关控制电路 ,并利用单片机中断功能准确查找交流电压为 0的点 .这种抑制噪声的方法电路结构简单、效果明显 。

Factory power switch's on and off usually cause high-frequency noise,it is disadventage for the whole control system.But when voltage is zero,on and off operation does not cause high-frequency noise.In this paper,we designed zero voltage switch to control circuit,applied computer interrupt technique to find voltage current zero point.Using this means to reduce noise is very easy and the result is ideal.