定子永磁型对转双转子高速飞轮电机 电磁振动分析及优化设计

To address the high electromagnetic vibration caused by the typical dual-salient-pole structure and high-speed, high-frequency operation of the stator permanent magnet counterrotating dua-l rotor high-speed flywheel motor (SPMCRDR-HSEM), the electromagnetic vibration analysis and optimization design of the machine are carried out. A semi-analytical calculation model for the radial electromagnetic force of SPMCRDR-HSEM is established based on the Maxwell stress equation, and the lowest-order radial electromagnetic force harmonic responsible for electromagnetic vibration is identified. To mitigate this lowest-order radial electromagnetic force, a novel split fault-tolerant tooth structure is proposed, and its principles for suppressing radial electromagnetic force and electromagnetic vibration are analyzed. The optimal structural parameters of the split fault-tolerant tooth are determined using the optimal split distance method. The performance of two SPMCRDR-HSEM prototypes—one with a traditional fault-tolerant tooth structure and the other with the split fault-tolerant tooth structure—is compared using the finite element method. The comparison focuses on radial air-gap magnetic flux density, radial electromagnetic force, electromagnetic vibration, and output torque. The results demonstrate that the optimized SPMCRDR-HSEM maintains excellent torque performance while reducing vibration acceleration at the fault-tolerant teeth of the inner and outer motors by 42.10% and 44.42%, respectively, effectively suppressing electromagnetic vibration. An experimental platform is built to conduct vibration tests, and the test results align with the simulation results, validating the rationality of the proposed split fault-tolerant tooth structure and the effectiveness of the optimization method. This study broadens the application field of stator-permanent-magnet motors and provides a new approach for suppressing electromagnetic vibration in such motors.