电动汽车轮毂电机技术的发展现状与发展趋势

Development Status and Trend of In-Wheel Motor Technology for Electric Vehicles

轮毂电机具有结构紧凑、传动效率高、控制和转向灵活等优点。由轮毂电机驱动的电动汽车是新能源汽车重要的发展方向。通过各种电机的对比,认为永磁同步电机效率高、功率密度高、可靠性好,是轮毂驱动电机一个较好的选择。总结了电动汽车轮毂电机国内外的应用概况,介绍了轮毂电机电磁设计优化、控制策略及散热方式和结构方面进行的研究和工作,最后探讨了我国电动汽车轮毂电机研究中存在的问题,展望了轮毂电机未来的发展方向。

In-wheel motor had the advantages of compact structure,high transmission efficiency,flexible control and steering,etc.Electric vehicle driven by in-wheel motor was an important development direction of new energy vehicle in the future.Permanent magnet synchronous motor was a better choice for in-wheel drive motor because of its high efficiency,high power density and good reliability.The application situation of in-wheel motor to electric vehicle at home and abroad was summarized,and the research and work of electromagnetic design optimization,control strategy,heat dissipation mode and structure of in-wheel motor were introduced.Finally,the problems of in-wheel motor in China were discussed,and the future development directions of in-wheel motor were prospected.