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功率器件的可靠运行是弧焊逆变器设计和制造过程中的一项关键技术，必须对其进行有效地保护．主要介绍了功率器件ＩＧＢＴ的开关特性和保护原理，分析了几种典型的保护措施，并提出了一种新型软开关技术。
The reliable operation of power devices is a key technology in the design and manufacture of arc-solder inverters, which must be effectively protected. The switching characteristics and protection principle of power IGBT are introduced. Several typical protection measures are analyzed, and a new type of soft switching technology is proposed.