Online monitoring of power device junction temperature is essential for the safe and reliable operation of high-power converters.Accurate junction temperature monitoring is the basis for failure analysis,operational condition monito-ring,health management and remaining service life prediction of high-power converters.Therefore,a large number of studies have been conducted for online monitoring of junction temperature of power devices.On the basis of this,this pa-per outlined the online monitoring methods of junction temperature of power devices based on thermal network modelling method and temperature-sensitive parameter method.Using this as a classification benchmark,the existing power device junction temperature monitoring methods were sorted out and discussion was made on the possibility of online realization of junction temperature monitoring in high power converters.Furthermore,the development and improvement of power device junction temperature monitoring methods were detailed for online applications and objective interference factors.Finally,a summary and comparison were made on the evolution,linkages and differences of existing online monitoring methods for junction temperature of power devices.Based on the analysis of the challenges faced by the existing junction temperature monitoring methods,the prospects of online monitoring of power device junction temperature with the assis-tance of artificial intelligence technology were envisioned.
关键词
功率器件/结温在线监测/热网络模型/温敏参数
Key words
power devices/online junction temperature monitoring/thermal network model/temperature sensitive param-eters
维普
万方数据