Abstract
In switched reluctance motor (SRM) systems, the power converter enables energy conversion, controls motor performance and improves system efficiency and reliability. Thermal management of the power converter can significantly improve its efficiency and the stability of the whole system, reduce faults caused by overheating, and thus improve the overall operational performance of electric heavy-duty trucks. This paper takes the SRM asymmetric half-bridge power converter as the research object and, by analyzing and calculating the losses of power electronic devices, models the power converter, carries out module simplification, calculates the results to simulate the temperature field of the power converter, and analyses the factors affecting heat dissipation of the power converter, so as to carry out a reliability study and improve the stability of the system.