一种带自动弱磁装置的混合式转子永磁同步电机设计与研究

Design and Research on a Novel Hybrid Rotor-structure Permanent Magnet Synchronous Motor with an Automatic Flux-weakening Device

针对传统永磁电机内部磁场难以灵活调整的问题,提出了一种带自动调磁机械装置的混合式转子结构永磁同步电机。分别介绍了混合式转子结构电机和附加的机械自动调磁装置,并分析了电机运行原理。通过有限元仿真和机械动力学分析研究了电机在不同运行状态下,气隙磁密、空载反电势、转速-转矩关系以及机械装置的齿轮旋转角度等,验证了机械调磁装置的可行性与可靠性。结果表明该电机具有良好的磁场调节能力,为混合动力汽车驱动电机设计与恒压发电提供参考。

Aiming at the difficulty on adjusting the internal magnetic field of traditional permanent magnet motor,a hybrid rotor-structure permanent magnet synchronous motor with an automatic flux-weakening device was proposed.The hybrid rotor-structure motor and the mechanical automatic flux-weakening device were introduced respectively,and the operation principle of the motor was analyzed.Through finite element simulation and mechanical dynamics analysis,the air gap flux density,no-load back EMF,speed-torque map and gear rotation angle of the mechanical device under different operating conditions were researched,and the feasibility and reliability of the mechanical magnetic adjustment device were verified.The results show that the proposed motor is with good ability on regulation magnetic field,which can provide reference for the design of hybrid electric vehicle drive motor and constant voltage power generation.