【目的】解决低极槽数分数槽集中绕组双转子同步电机(DRSM)中复杂气隙电磁力波引发的电磁振动与噪声问题。【方法】以6槽定子、2/4对极DRSM为研究对象,分析空载、负载工况下电磁力波特性和调制机理;基于磁势-磁导法推导磁动势和气隙磁密解析式,结合麦克斯韦张量法理论分析力波特性;通过空载反电势试验验证有限元模型,仿真分析力波时空谱及电枢反应影响;针对无轭定子设计齿靴结构,通过多物理场仿真评估振动噪声抑制效果。【结果】电磁力波空间阶次为极数与槽数最大公因数倍数,时间次数为偶数倍频;负载电流仅改变力波幅值,不改变阶次特性;齿靴结构使一阶磁导调制力波幅值降低31.01%,4倍频振动加速度和高频噪声显著降低。【结论】齿靴结构通过调控磁导分布有效抑制特定阶次电磁力波,为DRSM减振降噪提供了理论依据和工程解决方案。

[Objective] This study aims to address the issue of electromagnetic vibration and noise caused by complex air-gap electromagnetic force waves in dual-rotor synchronous motor (DRSM) with fractional-slot concentrated windings and low pole-slot numbers. [Methods] The 6-slot stator and 2/4-pole DRSM were selected as the research object to analyze the characteristics and modulation mechanism of electromagnetic force waves under no-load and load conditions. The magnetomotive force and air-gap flux density analytical expressions were derived based on the magnetic potential-permeance method, while the force wave characteristics were theoretically analyzed using Maxwell’s stress tensor method. The finite element model was validated through no-load back-electromotive force experiments, and the time-space spectrum of force waves as well as armature reaction effects were investigated through simulations. For the yoke-less stator design, a tooth shoe structure was developed, and its vibration and noise suppression effectiveness was evaluated via multiphysics field simulations. [Results] The spatial orders of the electromagnetic force waves were found to be multiples of the greatest common divisor of the pole number and slot number, while the temporal frequencies were even multiples of the fundamental frequency. The load current was observed to only alter the amplitude of the force waves without changing their order characteristics. The tooth shoe structure was demonstrated to reduce the amplitude of the first-order magnetic permeability-modulated force waves by 31.01%, with significant attenuation observed in the 4th-order vibration acceleration and high-frequency noise. [Conclusion] The tooth shoe structure effectively suppresses specific-order electromagnetic force waves by modulating the magnetic permeability distribution, providing both theoretical foundations and engineering solutions for vibration and noise reduction in DRSM.

中国博士后科学基金面上项目(2017M621086)；江苏省配电网智能技术与装备协同创新中心开放基金项目(XTCX202405)