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提出了一种新型的变频器触发电路数字式触发电路，其变频器为无环流型，电网自然换流，功率可双向传递的静止变频器；控制电路为多微机全数字式交交变频同步机矢量控制系统。此触发电路所需要的信号为三相交流电流过零信号，该信号分别送入系统的１＃～３＃从机的高速输入口，在计算机内部进行运算，然后由高速输出口发出相应的触发脉冲。
A new type of digital triggering circuit for inverter triggering circuit is proposed. The inverter is a non-circulating type inverter with natural commutation of power grid and static inverter whose power can be transmitted bidirectionally. The control circuit is a multi-microcomputer digital digital inverter synchronous machine vector Control System. The signal required by the triggering circuit is a three-phase AC current zero-crossing signal, which is respectively input into the high-speed input port of the 1 # to 3 # slave of the system and is processed inside the computer, and then triggered by the high-speed output port pulse.