Optimization Design of Hybrid Excitation Bearingless Permanent Magnet Synchronous Generator

In order to improve the comprehensive performance of the flywheel energy storage system and realize the flexible adjustment of the magnetic field of the motor, a hybrid excitation bearingless permanent magnet synchronous generator (HEBPMSG) is proposed in this paper. Firstly, the windings structure of the generator is designed and its working principle is explained; secondly, the electromagnetic performance is simulated and analyzed under different working conditions to verify the feasibility of hybrid excitation; thirdly, a multi-objective optimization scheme for the HEBPMSG is designed; finally, the performances before and after the optimization are compared. All the performances of the generator are significantly improved after optimization, which effectively verified the reasonableness of the designed optimization scheme.