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重点研究了绝缘门双极晶体管（ＩＧＢＴ）关断时阳极电流最大下降率与结温的关系，在此基础上提出了利用阳极电流最大下降率测量结温的方法。此外，对阳极电流最大下降率的产生时刻及其与ＩＧＢＴ过流状况的关系作了一定分析，并定义了参数Δｔ作为判别ＩＧＢＴ过流状况的特征量。
The relationship between the maximum anode current drop rate and the junction temperature during the turn-off of an IGBT is investigated. Based on this, a method of measuring the junction temperature based on the maximum anode current drop rate is proposed. In addition, the generation timing of the maximum anode current drop rate and its relationship with the IGBT overcurrent status are analyzed. The parameter Δt is defined as the characteristic value for judging IGBT overcurrent status.