关键词: 无人机, 外转子电机, 损耗计算, 温度场

Abstract: Design an external rotor permanent magnet synchronous motor used in the unmanned aerial vehicle drive system,the stator teeth were divided into 8 regions. The stator iron loss during frequency converter power supply was accurately calculated by considering the loss caused by harmonic magnetic fields in the stator iron core. The number of permanent magnet segments was determined by investigating the impact of permanent magnet segmentation on eddy current loss. The copper loss of the winding was accurately calculated through temperature field iteration. A fluid-structure coupling model of the motor was established to analyze the temperature field of the motor and verify the feasibility of the motor scheme. A prototype was manufactured,and a motor test platform is built to conduct the no-load test and temperature-rise test on the prototype. By comparing the experimental results with the simulation results,the reliability of the loss calculation and the correctness of the temperature field calculation model in this paper were verified.

Key words: unmanned aerial vehicle,external rotor motor,loss calculation,temperature field