新能源汽车用永磁电机转子结构分析

Rotor Structure Analysis of Permanent Magnet Motor for New Energy Automobile

针对新能源汽车用永磁电机,通过有限元法分析了V型、V一型、双弧型、U一型4种不同转子结构电机的交直轴电感、电磁转矩、磁阻转矩等性能,分析了不同转子结构的弱磁扩速能力及影响弱磁扩速能力的因素,仿真给出了不同转子结构的效率云图。通过综合分析,得出不同转子结构的特点,总结了不同转子结构所适用的新能源汽车用驱动电机的类型。

The permanent magnet motor for new energy automobile was introduced.The quadrature-direct axis inductance, electromagnetic torque and magnetic resistance torque properties were analyzed by finite element method for four kinds of motors with different rotor structures:“V” type,“V-” type, double-arc type,and “U-” type.The flux weakening capability and the factors influencing flux weakening capability were analyzed,and the efficiency maps of different rotor structures were given by simulation.By comparing and analyzing the characteristics of different rotor structures,it was concluded that different rotor magnetic circuit structures were suitable for different new energy automobile applications.