IGBT (Insulated Gate Bipolar Transistor) is a weak link in the reliability of aerospace electromechanical servo system. In this paper, by combining the control model and thermal model of aerospace electromechanical servo system, a simulation analysis method of IGBT thermal reliability based on failure mechanism is established, and three main IGBT thermal failure modes of aerospace electromechanical servo system, i.e. electrical over stress (EOS), thermal accumulation and thermal fatigue, are analyzed and experimentally verified. Finally, through the parameter sensitivity analysis, it is concluded that the main factors affecting the thermal reliability of IGBT are the current limiting parameters and the torque coefficient of the motor. The results can be used for the performance and reliability integrated design of aerospace electromechanical servo system.
Thermal Reliability Evaluation of IGBT for Aerospace Electromechanical Servo System
Lect. Notes Electrical Eng.
Chinese Intelligent Systems Conference ; 2022 October 15, 2022 - October 16, 2022
27.09.2022
17 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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