永磁同步电机永磁体退磁故障性能分析

Performance Analysis on the Permanent Magnet Demagnetization Fault of PMSM

潮湿、高温、化学腐蚀等复杂环境,会造成永磁同步电机永磁体退磁故障,这将会直接影响到永磁同步电机的性能。为了分析永磁体退磁故障对电机性能的影响,文章以一台3kW、1500r/min的永磁同步电机为研究对象,建立了二维瞬态电磁场物理模型,并通过对实验和仿真数据的对比分析,验证了模型的正确性。利用有限元方法分析了永磁体退磁故障对电机转矩及其波动、电流、空载反电动势、损耗等性能的影响,得到了永磁体不同退磁程度对电机性能影响的规律。

Humidity,high temperature,chemical corrosion and other complex environment can cause permanent magnet demagnetization fault of the PMSM and directly affects the performance of the PMSM.In order to analyze its influence on PMSM performance,a 3kW,1500r/min PMSM is taken as an example in which a two-dimensional transient electromagnetic field model is established while the correctness of the model is verified by comparing the experimental and simulation data.The influences of demagnetization fault on the motor’s torque,ripple,current,noload back EMF and losses of the PMSM are analyzed by finite element method,so as to achieve the variation laws in the condition under different degrees of demagnetization fault.