单桥式可控整流电路原理图如图1所示。手动调节Re，可改变触发脉冲频率，从而改变晶闸管的导通角，起到调压整流目的。但因触发电路脉冲较窄，功率较小，当负载为大电感（如电磁吸盘线自）时，会产生晶闸管不能导通故障。究其原因，是由于电感上电流不能跃变，假如电感原先并未 Single bridge controllable rectifier circuit diagram shown in Figure 1. Manually adjust Re, can change the trigger pulse frequency, thus changing the thyristor conduction angle, to regulate the purpose of regulating. However, due to the trigger pulse is narrow, the power is small, when the load is large inductance (such as the electromagnetic chuck line from), will produce thyristor can not turn on the fault. The reason is due to the inductor current can not jump, if the inductor did not