摘要：为了增大内置式永磁同步电机（IPMSM）磁阻转矩以提升电机的转矩密度，研究了内置铁氧体永磁同步电机转子中不同永磁体分层对电机电磁性能和机械性能的影响。采取相同定子结构以及同等用量铁氧体分别设计和优化3个不同永磁体层数的V型槽内置铁氧体永磁电机。在相同的工作电流下通过单位电流最大转矩的控制方式比较不同永磁体层数下电机的转矩脉动、平均输出转矩及其永磁转矩和磁阻转矩比例。研究分析了铁氧体分层对于电机退磁情况和应力分布的影响。结果表明对于内置铁氧体永磁电机进行永磁体分层可以有效增加磁阻转矩并提升总输出转矩。
关键词：永磁体分层；磁阻转矩；应力分布；退磁
Abstract: In order to improve the torque density by increasing the reluctance torque of interior permanent magnet synchronous machine (IPMSM),this paper investigated the influence of magnet layers on both electromagnetic and mechanical performances of ferrite IPMSM. Under the condition of an identical stator and the same ferrite magnet volume,by using different layers of magnets,three Vshape ferrite IPMSMs were designed and optimized. Under the maximum torque per amperecontrol,torque ripple, average electromagnetic torque,and the ratio between permanent magnet torque and reluctance torque were comparatively studied, with the same armature current. Furthermore,influences of different magnet layers ondemagnetization and rotor stress distribution were revealed and analyzed. Results shows that properly layering themagnetsis beneficial toenhancethe reluctance torque and promote the total output torque.
Key words: magnetlayering ;reluctancetorque;stressdistribution;demagnetization