高电压技术2024，Vol.50Issue(3)：1252-1263,12.DOI:10.13336/j.1003-6520.hve.20231882
基于电参数的IGBT开关瞬态过程耦合关系分析
Analysis of Transient Process Coupling Relationship of IGBT Switch Based on Electrical Parameters
摘要
Abstract
The transient current variation process of IGBT during switching includes the current rising process and the current dropping process.Due to the nonlinear characteristics of power devices and their close coupling with circuit pa-rameters,the electromagnetic phenomena during the transient process are complex.The coupling law of voltage and current parameters in transient process is emphatically studied,and the influence of the coupling relationship on the oper-ating characteristics of IGBT is analyzed.Firstly,the influence of parasitic PIN structure within IGBT and the collector-emitter voltage on the gate control model is analyzed.Secondly,based on the analysis of the gate control model,it is proposed that the fitting times of the collector current should consider the duration of the current variation process and the calculation scenario.Polynomial fitting of 2 or less times can approximate the waveform of the collector current and is sufficient for power loss analysis,but is not suitable for analyses of current variation rate and induced voltage.Moreover,the differences in the parasitic inductance calculation using the turn-on and turn-off waveforms are compared.The applicable range of calculating the parasitic inductance of the test circuit in different processes and the calculation method of the parasitic inductance in FWD packaging are proposed.Finally,the coupling relationship between the gate voltage and the collector-emitter voltage during the transient process is analyzed,and a state monitoring method of esti-mating the collector-emitter voltage with the gate voltage is proposed and experimentally verified.关键词
栅极电压/集射极电压/电流上升过程/电流下降过程/寄生电感/耦合关系Key words
gate voltage/collector-emitter voltage/current rising process/current dropping process/parasitic inductance/coupling relationships引用本文复制引用
李雨泽,张秀敏,袁文迁,宋鹏,季一润,焦超群..基于电参数的IGBT开关瞬态过程耦合关系分析[J].高电压技术,2024,50(3):1252-1263,12.基金项目
国家自然科学基金(52377001) （52377001）
国家电网公司总部科技项目(5500-202114133A-0-0-00). Project supported by National Natural Science Foundation of China(52377001),Science and Technology Project of the Headquarters of SGCC(5500-202114133A-0-0-00). （5500-202114133A-0-0-00）
