【摘要】 针对MW级磁悬浮储能飞轮电机转子高速运行中机械强度与电磁性能的矛盾，本文提出碳纤维护套与外磁桥截断协同优化策略。通过有限元仿真，系统研究碳纤维厚度、预应力与磁桥截断参数的耦合作用机制。采用外磁桥截断技术，降低漏磁通，使空载反电势提升10%;结合2.5 mm碳纤维护套与750 MPa缠绕预应力设计，转子铁芯应力降低59.7%。仿真结果表明，优化后转子在1.2倍超速下最大应力为411.28 MPa，负载平均转矩提升3.7%。该设计突破了传统金属护套的气隙磁场衰减限制，为兆瓦级高速电机转子设计提供了新参考。更多还原

【Abstract】 To resolve the inherent conflict between mechanical strength and electromagnetic performance in high-speed rotors of megawatt-scale magnetically levitated flywheel energy storage motors,this study proposes a coordinated optimization strategy combining carbon fiber sleeves with segmented outer magnetic bridges. Using finite element simulations,the coupled effects of carbon fiber thickness,pre-stress level,and magnetic bridge segmentation are comprehensively analyzed. An innovative application of outer magnetic bridge segmentation is introduced to suppress magnetic flux leakage,resulting in a 10% increase in no-load back electromotive force( EMF). In conjunction with a 2. 5 mm carbon fiber sleeve and a pre-stress level of 750 MPa,the rotor core stress is reduced by59. 7%. Simulation results show that the optimized rotor maintains a maximum stress of 411. 28 MPa under 1. 2 times overspeed conditions,with a 3. 7% improvement in average output torque under load. This design overcomes the conventional limitations of metallic sleeves in preserving air-gap magnetic fields,offering a new paradigm for rotor design in high-speed,megawatt-class interior permanent magnet machines.更多还原