多相永磁电机磁场解析预测与容错控制策略  

Magnetic field analysis prediction and fault-tolerant control strategy of multiphase permanent magnet motor

作　　者：杜建民[1] 李岩[1] 于占洋[1] DU Jianmin;LI Yan;YU Zhanyang(National Engineering Research Center for REPM Electrical Machines,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学国家稀土永磁工程技术研究中心,辽宁沈阳110870

出　　处：《电工电能新技术》2023年第1期1-10,共10页Advanced Technology of Electrical Engineering and Energy

基　　金：辽宁省教育厅科学研究项目(LJGD2019007)。

摘　　要：为了提高多相永磁同步电机在单相或多相绕组发生故障时的容错性能,基于傅里叶级数分析方法,建立了多相内转子表贴式永磁同步电机(SPMSM)绕组缺相不对称运行下的磁场解析计算模型,该解析计算模型能够考虑铁磁材料的非线性变化,并对气隙磁通密度、空载反电动势以及电磁输出转矩等性能参数进行准确计算;其次,以一台44极48槽12相SPMSM为例,通过有限元仿真分析和实验测试对磁场解析模型的准确性进行了验证。在此基础上,基于故障前后电机定子绕组合成磁动势不变的原则,提出一种多相永磁电机在单相或多相绕组开路故障下的容错控制策略,并以电磁输出转矩、转矩脉动等性能参数为考核指标,提高了多相永磁电机驱动系统的可靠性。In order to improve fault-tolerant operation capability of multi-phase surface-mounted permanent magnet synchronous motor(SPMSM)at asymmetrical fault condition,an analytical model of multi-phase SPMSM for asymmetrical fault condition is proposed for magnetic field calculation by the Fourier series analysis method,which can consider the nonlinear change of ferromagnetic material.And the performances such as air gap flux density,no-load back electromotive force(EMF)and electromagnetic output torque are calculated accurately.Taking an inner rotor 12-phase SPMSM with 44-poles and 48-slots as an example,the effectiveness of proposed model is validated by finite-element model(FEM)and experimental test.On this basis,based on the principle that the stator magnetomotive force remains unchanged before and after failure,the fault-tolerant control strategy is established to improve tolerance of multi-phase PMSM for one or more windings open circuit.The performance parameters such as electromagnetic output torque and torque ripple are used as evaluation indexes to improve the reliability of the multi-phase permanent magnet motor drive system.

关 键 词：12相SPMSM 磁场解析模型 不对称运行 容错性能 

分 类 号：TM351[电气工程—电机]