Optimization design of heat dissipation structure of integrated motor drives for application in aerospace

With the development of technology, The power density of permanent magnet synchronous motor application in aerospace is increasing rapidly. The integration of the machine with the power electronic converter and control system has many advantages such as high power density, high reliability and small size, etc. However the cooling design of it is challenging [1]. In this paper, the optimal design of the heat dissipation structure of a 1.2 kW Integrated Motor Drives adopted in aviation pump is studied by Taguchi method. First, a three-dimensional finite element simulation model is established, based on fluid mechanics and heat transfer theory. Second, the parameter sensitivity analysis of the size of the radiator fin, the size of the drive plate shell, the thermal insulation material of the electric power device on the temperature rise of system is carried out. Then, according to the results of the sensitivity analysis of the parameters, the Taguchi method is used to optimize the design. At last, the temperature field simulation and experiment are carried out to verify the rationality of the optimization design.