中国电机工程学报2023，Vol.43Issue(7)：2563-2572,10.DOI:10.13334/j.0258-8013.pcsee.220786
基于气隙磁场重构的永磁电机转矩脉动抑制研究
Airgap Magnetic Field Reconstruction for Torque Ripple Mitigation of Permanent Magnet Machines
摘要
Abstract
The cogging torque of permanent magnet (PM) machines can cause torque ripple, leading to reduced low-speed performance and control precision of the system. This study aims to establish the relationship between airgap field harmonics and cogging torque, with a focus on the influence of low order harmonics (3rd, 5th, and 7th). The cogging torque generation mechanism is analyzed from the perspective of magnetic field modulation, and a magnet partial inverse cosine shaping method is proposed to reconstruct airgap magnetic field harmonics. Cogging torque can be significantly reduced by optimizing the 3rd, 5th and 7th airgap field harmonics. Compared with existing methods, the proposed method achieves cogging torque reduction by indirectly controlling the airgap field, which is much more time-saving. The effectiveness of the method is verified using finite element analysis. A 12-slot/8-pole PM machine with a partial inverse cosine shaped rotor has been manufactured and measured for verification.关键词
气隙磁场谐波/齿槽转矩/永磁电机/转矩密度Key words
airgap magnetic field harmonics/cogging torque/permanent magnet machine/torque density分类
信息技术与安全科学引用本文复制引用
王凯,孙海阳,朱姝姝,刘闯..基于气隙磁场重构的永磁电机转矩脉动抑制研究[J].中国电机工程学报,2023,43(7):2563-2572,10.基金项目
国家自然科学基金区域创新发展联合基金项目(U22A20218) （U22A20218）
国家重点研发计划项目(2022YFB3403102). （2022YFB3403102）
