方波交流埋弧焊电源的设计与分析

Design and analysis of AC square wave SAW

交流方波埋弧焊具有电弧稳定、无磁偏吹、焊接熔敷率高等优点,是埋弧焊技术发展的一个新方向。提出了一种三相输入、单相输出交流方波埋弧焊电源的新电路,详细分析了这种晶闸管整流、互感换向实现交流方波电路的工作原理和控制方法。实验结果表明,利用互感换向实现交流方波的埋弧焊电源,其电流过零的di/dt很大,电弧稳定性不亚于直流电弧。

The AC square wave SAW is with steady arc,no are blow and higher deposition rate,etc.h is a new orientation of SAW technology breakthrot,gh.This article presents a new circuit of three-phase input and single-output AC square wave SAW,particularly analyzes the operating principles and control methods of such thyristor commutation,and interactions exchanging of orientation to achieve AC square wave eircuit,The results show that by using interactions for exchanging orientation to achieve AC square wave SAW, the di/dt is very great,and the are stability is same as the DC electric arc.