Current research focuses primarily on studying the heat dissipation modes of drive devices in various configurations to optimise the energy consumption of cooling systems in new energy vehicles and improve their driving range; however, the overall power consumption is not yet fully grasped or controlled. Grounded in heat transfer theory, this study simulates the losses of the IGBT module under varying phase current, output voltage frequency, gate on–off resistance and heatsink temperature using IPOSIM. It proposes a method to predict losses and temperature rise through the motor’s input current and output speed. Therefore, an experimental platform for the heat dissipation system of a pole‐changing motor driver is set up. In addition, the theoretical relationship between IGBT loss and power consumption of the cooling pump and fan is analysed. An optimal loss model is developed, and the solution with minimal loss is found using the sparrow search algorithm (SSA), polynomial curve fitting (PCF) is used to verify its overall performance. For further verification, the traditional heatsink cooling water inlet temperature of 65°C is used as a comparative example. The results demonstrated that, with the new optimisation method, total loss can be reduced to varying degrees.
Cao et al. (Thu,) studied this question.