【摘要】 高速永磁同步电机在PWM供电下电流谐波含量高，转子涡流损耗显著，导致转子温升问题突出。为抑制谐波带来的涡流效应，本文以一台额定功率200 k W、转速30000 r/min电机为研究对象，提出一种“内层钛合金外层碳纤维”混合护套结构，以协同优化涡流抑制与散热性能;此外，探讨了在永磁体与护套间增设高电导率铜屏蔽层的方法。并研究了调制比与载波比对其屏蔽效果的影响。研究结果表明:所提出的混合护套结构可有效降低转子总涡流损耗达39.7%;铜屏蔽层的效能高度依赖于供电方式与变频器参数，其在低载波比PWM供电下能显著抑制损耗。更多还原

【Abstract】 High-speed permanent magnet synchronous motors(HSPMSMs) exhibit high current harmonic content under PWM supply,leading to significant rotor eddy current losses and prominent temperature rise issues. To suppress harmonic-induced eddy current effects,this study took a 200 k W,30,000 r/min HSPMSM as the research object and proposed a hybrid sleeve structure with an inner titanium alloy layer and an outer carbon fiber layer to synergistically optimize eddy current suppression and heat dissipation performance. Additionally,the method of adding a high-conductivity copper shielding layer between the permanent magnets and the sleeve was explored. The influence of modulation index and carrier ratio on its shielding effectiveness was investigated. Results show that the proposed hybrid sleeve structure reduces the total rotor eddy current loss by up to39. 7%. The effectiveness of the copper shielding layer is highly dependent on the supply method and inverter parameters,demonstrating significant loss suppression under low carrier ratio PWM supply.更多还原