大功率IGBT模块串联动态均压研究.pdfVIP

总第49 卷 第556 期 电测与仪表 Vol.49 No.556 2012 年 第4 期 Electrical Measurement Instrumentation Apr. 2012 大功率IGBT模块串联动态均压的研究 窦康乐，严仲明，李海涛，程志，吴锐，王豫 （西南交通大学电气工程学院, 成都610031） 摘要：绝缘栅双极型晶体管IGBT （Insulated Gate Bipolar Transistor）的串联使用是一种较为有效的提高耐压的方 法。作为电感储能型脉冲功率系统中的主断路开关，IGBT串联组合会在开关的动作瞬间在各串联模块两端出现 动态不均压的现象。工程应用中，各串联IGBT栅极驱动信号的不同步是导致动态不均压的主要原因。文中分别 从负载侧被动均压和栅极侧主动均压对驱动信号的同步性补偿作用进行了理论分析和实验验证，结果表明均 可以达到很好的动态均压效果。在此基础上提出利用阻容二极管有源均压法实现多个IGBT模块的串联应用，仿 真验证了该方法在3个IGBT串联应用中的可行性。对工程实际应用具有一定的参考意义。 关键词：IGBT; 串联; 动态均压；阻容二极管有源均压法 中图分类号：TM13 ，TN386 文献标识码：A 文章编号：1001- 1390（2012）04- 0087- 05 Research on Dynamic Voltage Sharing of High-power Series Connected IGBTs DOU Kang- le, YAN Zhong- ming, LI Hai- tao, CHENG Zhi, WU Rui, WANG Yu （Southwest Jiaotong University, School of Electrical Engineering, Chengdu 610031, China） Abstract ：The serial use of the Insulated Gate Bipolar transistor （IGBT）provides a shortcut method to improve withstand voltage capability. The dynamic voltage sharing must be resolved when IGBT as the main circuit- breaker of inductance stored energy pulse power system. In engineering applications, the uneven gate drive signals of the series IGBTs are the most important factor leading to the dynamic voltage sharing at IGBTs switching moment. This paper respectively analyzes and validates the compensation effect of load ’s passive voltage sharing and grid ’s initiative voltage sharing. The results show that both two methods can achieve a good effect of dynamic voltage sharing. On this basis, the series application of multiple IGBTs modules has been proposed by the means of resistance and capacitance diode. The simulation validates the feasibility of series application of three IGBTs in this way. It will do a great significanc