采用单结晶体管触发电路、由两只晶闸管组成的单相桥,线路简单,经济实用,广泛应用于一些无需逆变的小功率场合。然而,使用中易发生直流输出电压波动,甚至出现变流失控现象。失控发生的原因往往使初次接触者困惑。现分析如下: 1.即使是同一型号、规格的晶闸管,其门极特性不可避免地 Single-junction transistor trigger circuit, composed of two single-phase thyristor bridge, the line is simple, economical and practical, widely used in some small power inverter without the occasions. However, it is easy to occur when using the DC output voltage fluctuations, and even the phenomenon of variable current control. The causes of loss of control often confound initial contacts. The analysis is as follows: 1. Even with the same type, size thyristor, the gate characteristics of the inevitable