Temperature sensitive electrical parameter method has characteristics such as strong online capacity,non-invasiveness,and rapid response,so it has become a research hotspot at present.The on-state voltage drop is taken as a temperature sensitive electrical parameter,and an online monitoring method for IGBT junction temperature is studied based on the on-state voltage drop.First,the data of on-state voltage drop,collector current,and junction temperature of IGBT is obtained through the double-pulse test circuit.Then,based on the measured data,a three-dimensional mapping representation model of IGBT collector current,junction temperature,and on-state voltage drop is constructed.Finally,a novel on-state voltage drop sampling circuit was designed,and an online monitoring experimental of IGBT junction temperature was conducted.Experimental results verified the accuracy and validity of the obtained three-dimensional junction temperature representation model.
关键词
绝缘栅双极晶体管/结温在线监测/热敏感电参数/导通压降/双脉冲测试/三维映射表征模型/采样电路
Key words
Insulated gate bipolar transistor(IGBT)/junction temperature on-line monitoring/temperature sensitive electrical parameter/on-state voltage drop/double-pulse test/three-dimensional mapping representation model/sampling circuit
维普
万方数据