The silicon controlled trigger and it s auxiliary circuit could regulate simultaneously the controlling coil current of four series - parallel connected powers , so the purpose of making four powers output in step with was achieved , and the process of increasing progressively current after lighting arc and weakening current after going out arc was realized 利用可控硅觸發(fā)器及輔助電路可以同時調(diào)節(jié)串并聯(lián)在一起的四臺電源控制線圈的電流,達到四臺電源同步輸出的目的,并且實現(xiàn)了等離子弧噴涂引弧時電流遞增和熄弧時電流衰減的過程。