【摘要】 电驱动系统是新能源汽车的核心总成部件，其综合性能优化具有重要意义。为了提高新能源汽车动力性与经济性，电驱动系统逐渐形成了多种技术路线来提升功率密度。文章针对纯电动乘用车高速电驱动系统展开研究，阐述了转子结构设计、损耗抑制、冷却技术、宽禁带功率器件等车用高速电驱动系统国内外发展现状；提出了转子强度、传动系统设计、高频调控、冷却散热、振动噪声、轴电流、绝缘设计的电驱动系统关键问题；总结了电驱动系统新材料技术不断突破、集成度不断深入、调控性能持续优化、运行效率持续提升、智能运维体系加速构建的发展趋势；并在此基础上提出了注重电驱动系统综合性能均衡优化、加强电驱动系统与底盘融合设计、推进电驱动系统低碳绿色发展和优化高速电驱动系统成本管理的发展建议。更多还原

【Abstract】 Electric drive systems are the core assembly components of new energy vehicles, and their comprehensive performance optimization is of great significance. To enhance the power and economic efficiency of new energy vehicles, the electric drive systems have gradually developed multiple technological pathways to improve power density. This paper focuses on high-speed electric drive systems for pure electric passenger vehicles, elaborating on the domestic and international development status of rotor structure design, loss suppression, cooling technology, and wide-bandgap power devices in automotive high-speed electric drive systems. It identifies key issues in the electric drive systems, including rotor strength, transmission system design, high-frequency control, cooling and heat dissipation, vibration and noise, shaft current, and insulation design. The development trend in new material technology of the electric drive systems is summarized, such as continuous breakthrough, deepening integration, continuous optimization of control performance, continuous improvement of operation efficiency, and accelerated construction of intelligent operation and maintenance systems. On this basis, the paper proposes development suggestions about paying attention to the balanced optimization of the comprehensive performance of the electric drive systems, strengthening the integration design of the electric drive systems and the chassis, promoting the low-carbon green development of the electric drive systems, and optimizing the cost management of the high-speed electric drive systems.更多还原