【摘要】 针对轮毂电动机空间狭小的客观限制，充分考虑温度对电动机转矩性能的影响，以一种高转矩密度U型永磁轮毂电动机作为研究对象，开展考虑温度因素的电动机优化设计.通过理论分析温升对电动机转矩性能的影响，确定了电动机损耗与电流角为电动机的优化设计目标.引入灵敏度分析方法，计算设计参数关于优化目标的灵敏度指数，以确定高敏感优化设计参数.通过采用响应面法和多目标遗传算法对电动机实施多目标优化，最终确定电动机的最优设计方案.对比了电动机优化前后的损耗特性、温度分布特性、转矩性能等，分析了电动机永磁体工作点特性.加工了该轮毂电动机的原理试验样机，进行了试验验证.结果表明：理论分析和试验结果都验证了该电动机及优化设计的有效性，且经过优化设计，电动机输出转矩提升幅度达到了25.8%.更多还原

【Abstract】 The high torque density U-shaped permanent magnet in-wheel motor was proposed for the application of distributed drive electric vehicle hub direct drive. The impact of temperature rise on the torque performance of motor was theoretically analyzed, and the motor loss and current angle were identified as the optimization design objectives. The sensitivity analysis method was introduced, and the sensitivity indices of design parameters to the optimization objectives were calculated to determine the highly sensitive design parameters for optimization. Using the response surface method and multi-objective genetic algorithm to implement multi-objective optimization of the motor, the optimal design scheme of the motor was finally determined. The loss characteristics, temperature distribution characteristics and torque performance of the motor before and after optimization were compared, and the operating point characteristics of the permanent magnet were analyzed. The experimental prototype of the wheel hub motor was machined. The results show that the effectiveness of the motor and the optimal design is verified by the theoretical analysis and experimental results, and the output torque of the motor is increased by 25.8% after optimization.更多还原