基于大功率逆变器IGBT开关瞬态电压、电流波形的杂散参数抽取方法  

A Stray Parameter Extracted Method for the High Power Inverter Based on the IGBT Transient Voltage and Current Waveforms

作　　者：陈材[1] 陈宇[1] 裴雪军[1] 康勇[1] 

机构地区：[1]华中科技大学应用电子工程系

出　　处：《电力电子》2010年第3期66-69,65,共5页Power Electronics

摘　　要：由于线路杂散电感的存在,IGBT(insulated gate bipolar transistor)开通关断时将在开关管两端产生电压尖峰。为了研究其的影响,需要对线路杂散电感进行抽取。为此,本文提出一种基于IGBT开关瞬态电压、电流波形的杂散参数抽取方法。在IGBT的开通过程中,考虑了IGBT反并联二极管的反向恢复过程,并且利用由该过程引起电压尖峰进行线路的杂散电感的抽取;在IGBT的关断过程中,通过对关断波形进行了更详细的分析,给出更精确的线路杂散电感的抽取方法。最后,将该方法应用于一台75kVA的单相逆变器,实验结果证明了本方法的有效性与正确性。Because of the existing of the stray inductance, the voltage peak can be observed ：during the transient switching period of the IGBT（insulated gate bipolar transistor）. To research its effect, the extraction of the stray inductance is necessary. This paper proposes a new extraction method based on the transient voltage and current waveforms of the IGBT. During the turning on period of the IGBT, the reverse recovery effect of the anti-parallel diode of the IGBT is taken into consideration, and the voltage peak occurred by the reverse recovery is used to extract the stray inductance; dunng the turning off period of the IGBT, the more detail analysis is given and the more exact extraction method is presented. Finally, the proposed method is applied to a single phase inverter prototype with 75kVA capability, the experimental results show the validity of the analysis.

关 键 词：IGBT 电压尖峰 杂散电感 反并联二极管 开通 关断 

分 类 号：TN[电子电信]