关键词: 电机控制器, 冷却结构, 热仿真, 温升测试

Abstract: The SiC controller will generate a lot of heat and cause its temperature to rise sharply in a short timewhen working under high frequency conditions. In order to ensure the normal operation of the controller, a special cooling structure needs to be designed to dissipate heat. According to the cooling requirements of a SiC controller, the corresponding cooling structure was designed and introduced in detail. Under the condition of using the cooling structure, the temperature distribution law of the SiC module and film capacitor of the controller was analyzed and researched by thermal simulation. A prototype of the SiC controller was fabricated, and the temperature rise of the SiC module and the film capacitor was tested respectively under the peak operating condition and the rated operating condition. The test results show that the cooling structure designed in this paper has the advantages of good heat dissipation effect. It can meet the working requirements of SiC controllers and has important guiding significance for the design of cooling structures of similar SiC controllers.

Key words: motor controller, cooling structure, thermal simulation, temperature rise test