To protect the power component of electric welding machine,overtension and undertension protection are circuit designed.

为保护焊机的功率器件设计了过压欠压电路。

The welding machine has strong anti-electricity fluctuation ability,it is available to produce in small quantity.At the same time,further research should be held on accurancy accouplement.

得出该焊机抗电网波动能力强、可小批量生产，同时还应从精确匹配上进一步研究的结论。