强激光与粒子束, 2014, 26 (4): 045027, 网络出版: 2014-04-24  

绝缘栅双极晶体管串联应用中暂态均压特性

Transient voltage balancing of series connected IGBTs
徐旭哲 1,2,*严萍 1,2
作者单位
1 中国科学院 电工研究所, 北京 100190
2 中国科学院 电力电子与电气驱动重点实验室, 北京 100190
摘要
采用金属球隙放电的方式模拟了负载短路时的暂态过程。通过引线自感公式计算法和电路状态分析法估算脉冲放电回路的杂散电感数值,并采用传统RCD均压网络的绝缘栅双极晶体管串联链进行各元件参数差异下的蒙特卡罗仿真分析,发现影响串联链暂态均压特性的关键元件是栅极稳压二极管和动态均压电容。因此为了提高这类拓扑结构的串联链的可靠性,在筛选元件时要尤其注意栅极稳压二极管的限幅保持一致。
Abstract
The discharge between two metalballs was used to simulate the transient process of the short-circuit load. The formula of inductor for overhead line and the circuit transient analysis were used to estimate the stray inductance. The calculation results accorded with simulation analysis results. Using the Monte Carlo analysis of various elements on the RCD (resistor, capacitor, and diode) snubber circuits and the gate drive circuits, the key elements influencing the transient voltage balancing of series connected IGBTs were found. They were Zener diodes of the gate drive circuits and capacitors for voltage balancing. The key elements of uniformity characteristics should be chosen to improve the reliability of the pulse power designed by the same topology.
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徐旭哲, 严萍. 绝缘栅双极晶体管串联应用中暂态均压特性[J]. 强激光与粒子束, 2014, 26(4): 045027. Xu Xuzhe, Yan Ping. Transient voltage balancing of series connected IGBTs[J]. High Power Laser and Particle Beams, 2014, 26(4): 045027.

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