电工技术学报2017，Vol.32Issue(4)：35-47,13.
基于门极阻容补偿网络的IGBT串联均压方法
Voltage Balancing Method of Series-Connected IGBT Based on Resistor-Capacitor Circuit on Gate Side
梅桂芳 1安昱 1张建2
作者信息
- 1. 西安许继电力电子技术有限公司西安 710075
- 2. 许继集团有限公司许昌 461000
- 折叠
摘要
Abstract
Based on the detailed analysis of turning-off process of IGBT and the summarization of a series of key equivalent circuits and equations, a voltage-balancing method for series-connected IGBTs was put forward to solve voltage inequality. This method adopted a resistor-capacitor circuit on gate electrode. A mathematical formula was derived that can describe the influence of dynamic voltage unbalance and turning-off time inequality on series-connected IGBTs. The selection principle of the network parameters was also analyzed. A semi-physical model of IGBT based on Lumped Charge method was established, which was used to verify the IGBT gate resistance-capacity compensation network. The parameters of the compensation network under the actual test conditions were given. The test system of the series-connected IGBTs was established, and then the experimental verification was carried out under various voltage and current conditions. The results show that the proposed method can effectively control the deference between the turning-off delay time and the increasing speed of the turning-off voltage. That is, the dynamic peak voltage unbalance reduced from 14.4% to 6.3% under the condition of 2000V/1500A.关键词
IGBT串联/门极阻容网络/动态特性/关断特性Key words
Series-connected IGBT/gate resistor-capacitor circuit/switching characteristics/turn-off characteristics分类
信息技术与安全科学引用本文复制引用
梅桂芳,安昱,张建..基于门极阻容补偿网络的IGBT串联均压方法[J].电工技术学报,2017,32(4):35-47,13.
