Analysis And Research On Power Module Loss Of Subway Convert

As the power level of the subway power electronic converter device continues to increase,the power dissipation of the entire system also needs increasing.Heating is mainly caused by the loss of the power device,and the power device itself is sensitive to temperature,so the power is accurately analyzed.The loss characteristics of the device optimize the thermal design of the inverter and ensure stable and reliable operation of the inverter.The thesis takes the vehicle auxiliary power converter in the purchase of a subway vehicle in one city as the example.In the paper,the working characteristics of the power module and the requirements of the auxiliary power supply,the voltage and current levels of the power module are calculated to provide a basis for the selection of the power device;the loss composition and analysis methods of the power module are analyzed and compared in detail.The loss analysis method using the cubic polynomial normalization fitting is obtained and simulated and tested.Heating dissipation method for solving the temperature rise due to loss is proposed:heat pipe cooling + natural cooling;a model for establishing the temperature rise of the power module,and the temperature rise process is simulated and experimentally tested in combination with the contents of this paper,and the method is theoretically Simulation and experimental verification,verification to meet the system requirements.All the results in this paper provide a certain reference value for the selection of converter power modules.In this paper,some research results have been made on the heat dissipation and temperature rise of the converter,but there are still some aspects to be improved.