关键词: 盘式永磁同步电机, 冷却水流量, 温度场, 实验验证, 数值模拟

Abstract: Water cooling has become the main heat dissipation method of axial flux permanent magnet synchronous machine, but the flow channel design and power matching directly affect the efficiency of the motor, A low-cost end-face scour cooling design for small and medium power axial flux permanent magnet synchronous machine was presented. A threedimensional fluid-structure coupled heat transfer model was established and an experimental platform was set up to analyze the temperature distribution of the motor and the hydraulic-heat transfer performance of the runner. The results show that the error between simulation results and experimental results was less than 5%, which verifies the effectiveness of the design. The end cooling runner has good heat dissipation performance in small and medium power motors. Taking 7. 5 kW motor as an example, when the cooling water flow rate is 1. 0 L / min, the winding temperature rise is controlled within 60 K. As the Re increases, the temperature rise of the motor gradually stabilizes. Considering the pressure drop and heat
transfer performance, there is an optimum cooling water flow rate. The optimum cooling flow rate of the motor is 3. 0 L /min, which can ensure good heat dissipation while keeping a lower pressure drop loss.

Key words: axial flux permanent magnet synchronous machine, flow rate of cooling water, temperature field, experimental verification, numerical simulation