Life Evaluation of High-Speed Train Traction Rectifier IGBT Module Considering Electric and Thermal Parameters Update
Insulated gate bipolar transistor(IGBT),as a key component of train converter,its life is affected by parameters change in aging process.Therefore,a life prediction method of IGBT module considering the renewal of electro-thermal parameters is proposed.Firstly,using the external voltage and current data collected by the actual vehicle and the modulation strategy of the converter,the driving signal of IGBT is deduced,and then the voltage and current of a single IGBT are obtained;secondly,the Foster thermal network model based on data book is established to obtain the junction temperature of IGBT;then,considering the actual aging process of the IGBT,an update strategy for thermal resistance and on-voltage drop during the calculation of the junction temperature of the IGBT is proposed.Finally,the damage degree of IGBT is estimated by life model,and the uncertainty in the process of device life calculation is evaluated by Monte Carlo simulation to obtain the reliability change curve.
NETL
NSTL
万方数据
维普
