Junction Temperature and Fatigue Life Calculation of IGBT Module for Metro Vehicle Traction Inverter

doi:10.11985/2017.10.002

Abstract

Abstract:

During the operation of rail vehicle, there are many factors that complicate the fluctuation of IGBT module’s junction temperature for traction invertor, and affect the fatigue life of IGBT module. Taking Beijing Metro Line 7 as the research object, the electrical parameters are obtained based on the most rapid strategy and rated load condition, and the losses of IGBT module are calculated based on the datasheet and calculation method of IPOSIM software. The thermal resistance curve of heat pipe radiator with the vehicle velocity is obtained by numerical simulation, the temperature curves of IGBT junction, IGBT case, diode junction, diode case and heat sink are calculated by using thermal impedance method. The fatigue life of IGBT chip and diode chip are obtained according to LESIT fatigue life model, rain flow counting method and linear cumulative damage law. Finally, the influence of the economic strategy, overload condition, circumstance temperature, contact resistance and life model parameter on the chip average temperature and fatigue damage are discussed.

Key words: Metro vehicle, traction inverter, IGBT module, traction calculation, loss, temperature rise, fatigue life

CLC Number:

U231
TM46

Ding Jie,Zhang Ping. Junction Temperature and Fatigue Life Calculation of IGBT Module for Metro Vehicle Traction Inverter[J]. Journal of Electrical Engineering, 2017, 12(10): 9-18.

Figures/Tables 12

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