表面-内置式永磁同步电机优化与特性分析

Optimization and Analysis of the Surface-Mounted and Interior Permanent Magnet Synchronous Motor

针对表面式永磁同步电机弱磁调速范围小、功率密度低,内置式永磁同步电机转矩脉动大、漏磁凸出、机械强度差等缺陷,提出一种新型表面-内置式永磁同步电机。采用有限元法建立表面-内置式永磁同步电机仿真模型,计算表面-内置式永磁同步电机的电磁参数,建立电机的等效磁路模型。对内置永磁体体积和表面永磁体体积的比值、永磁体的形状进行优化设计,分析电机的转矩波动和力能指标与内外永磁体体积比值和永磁体形状的关系。分析有限元计算结果,验证了设计及优化的电机参数的合理性和此结构电机性能的优越性。

Aiming at the narrow field weakening speed range,low power density for surface-mounted permanent magnet motor and the defects of torque ripple, magnetic flux leakage and mechanical strength for interior permanent magnet motor, a new surface-mounted and interior permanent synchronous motor （SIPMSM） was proposed. The model of SIPMSM was es- tablished to adopt the finite element method, and the electromagnetic parameters of SIPMSM were calculated to establish e- quivalent magnetic circuit model. The ratio of between the interior permanent magnet volume and the surface-mounted per- manent volume and the shape of permanent magnet were optimized, the relationship was analyzed between the torque ripple and the product of efficiency and power factor of motor and volume and shape of permanent magnet. The rationality of opti- mized motor parameters and the dominance of the surface-mounted and interior hybrid rotor structure were verified analy- zing calculation results of the finite element .