一种用于IGBT串联的简单可靠高压隔离驱动电源

A Simple and Reliable High Voltage Isolated Driver Power Supply for Series-Connected IGBTs

在IGBT串联装置中，需要为每个开关管配备门极驱动电源，而且串联器件的驱动参考电位几乎都是浮动的，因此各器件的驱动都需要一定高压等级的隔离性能。一般需设置独立的包括原、副边电路的整套工作电源，电路复杂、可靠性低。本文针对IGBT串联多路隔离电源驱动电路，采用分布式供电方式，使用一套主电路产生多组彼此隔离的副边电压，设计了一种电路结构简单、体积小、可靠性高的驱动电源。之后将其应用于6KV IGBT串联直流断路器中，效果良好。

In the application of series-connected IGBTs, the isolated power supply of gate driver is necessary for each switch. Since the reference potential is floating, each power supply requires a certain level of high voltage isolation performance and the power supply include primary and secondary circuit is needed, these make the system complex and unreliable. In this paper, a drive power supply generate serial isolated secondary power supply with one main circuit is designed for series-connected IGBTs. The driver power supply have simple circuit structure, small size, and high reliability. Finally, a 6KV breaker of series-connected IGBTs is built to verify the proposed power supply. The results are presented.