目前,在工业上使用的电焊机,不论是交流输出、直流输出或是交、直流两用输出,其输入部分均是交流电源供电,这类焊机不能直接使用在直流电源上。但在实际工作中,往往在无交流电源的情况下需要进行焊接,如野外、海上作业等场合。因此,研制直流电源焊机早已成为国内外专家的课题,各类直流电焊机也相继问世。由大连船舶工业公 Currently, the use of industrial welding machine, whether it is AC output, DC output or AC, DC dual output, the input part of the AC power supply, such welding machine can not be directly used in the DC power supply. However, in practical work, often in the absence of AC power needs welding, such as the field, offshore operations and other occasions. Therefore, the development of DC power welding machine has long been a subject of experts at home and abroad, all kinds of DC welding machine have also come out. Dalian Shipbuilding Industry Corporation