弧焊逆变器中IGBT的几种保护措施

On IGBT'S Protection measures in welding convertor

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 in welding convevtor is the key technology in its design and manufacturie and must be protected effectively. In the paper, the switch characteristic and protection principles of IGBT are described. Several typical protection circuits are analyzed. A new soft switch technology is put forward.