一种表贴式永磁同步电机磁极形状优化方法

摘要/Abstract

摘要： 为了降低表贴式永磁同步电机气隙磁通密度波形畸变率,提出了一种准确、快速优化磁极形状的解析计算方法。推导并优化了磁极磁动势、极间磁动势和气隙磁导函数,建立了磁极偏心结构磁场解析计算模型。基于该解析模型计算分析了一台8极36槽表贴式永磁同步电机空载气隙磁通密度和线空载反电动势等电磁参数,并通过有限元法进行了仿真验证。结果显示,该解析计算与有限元计算结果相吻合,表明该方法具有一定的实际应用价值。在确定最小气隙长度前提下,通过对永磁体端部厚度的参数化设计,得到了理想的气隙磁密、线空载反电动势以及齿槽转矩性能参数。为表贴式永磁同步电机磁极形状优化设计提供了参考。

关键词: 磁极偏心, 优化设计, 表贴式永磁同步电机, 有限元仿真

Abstract: In order to reduce magnetic flux density waveform distortion rate in the air gap of the surface mounted permanent magnet synchronous motor (SPMSM),an analytical method of optimizing the pole shape accurately and quickly was presented.The magnetomotive force, the magnetomotive force function between poles,and air gap permeability calculation function were derived and optimized.A magnetic field analytical model on the eccentric structure magnet was established.Based on this analytical model,the electromagnetic parameters on the no-load air gap magnetic flux density and the no-load line back electromagnetic force (EMF) of an 8-pole 36-slot SPMSM were calculated and verified by the FEM.The results show that the two calculation methods were consistent and had certain practical application value.Under the premise of determining the minimum length of air gap, through the parametric design of the thickness of the ends of the PM,the optimized air gap magnetic density, the no-load line back EMF and the cogging torque performance parameters were obtained.The method provides reference for optimization design of the magnetic pole shape of SPMSM.

Key words: eccentric pole, optimization design, surface-mounted permanent magnet synchronous motor (SPMSM), magnetic flux density

中图分类号:

TM341
TM351

丁嘉露, 于慎波, 赵海宁, 夏鹏澎. 一种表贴式永磁同步电机磁极形状优化方法[J]. 微特电机, 2020, 48(9): 18-21.

DING Jia-lu, YU Shen-bo, ZHAO Hai-ning, XIA Peng-peng. Optimization of Magnetic Pole Shape for Surface-Mounted Permanent Magnet Synchronous Motor[J]. Small & Special Electrical Machines, 2020, 48(9): 18-21.

参考文献

[1] 吴震宇,曲荣海,李健,等.表贴式高速永磁电机多场耦合转子设计[J].电机与控制学报,2016,20(2):98-105.
[2] WU L J,ZHU Z Q.Analytical modeling of surface-mounted PM machines accounting for magnet shaping and varied magnet property distribution[J].IEEE Transactions on Magnetics,2014,50(7):1-11.
[3] 杨思雨,夏长亮,王慧敏,等.磁极分段型表贴式永磁电机建模与分析[J].电工技术学报,2015,30(2):49-56.
[4] 杨玉波,王秀和,丁婷婷.基于单一磁极宽度变化的内置式永磁同步电动机齿槽转矩削弱方法[J].电工技术学报,2009,24(7):41-45.
[5] MADHAVAN R,FERNANDES B G.Performance improvement in the axial flux-segmented rotor switched reluctance motor[J].IEEE Transactions on Energy Conversion,2014,29(3):641-651.
[6] FANG H W,WANG D.A Novel design method of permanent magnet synchronous generator from perspective of permanent magnet material saving[J].IEEE Transactions on Energy Conversion,2017,32(1):48-54.
[7] WANG K,ZHU Z Q,OMBACH G.Torque enhancement of surface-mounted permanent magnet machine using third-order harmonic[J].IEEE Transactions on Magnetics,2014,50(3):104-113.
[8] 丁鸿昌,刘鲁伟,吕楠,等.表贴式永磁同步电机气隙磁密的计算与分析[J].计算机仿真,2018,35(4):179-183.
[9] 张炳义,贾宇琪,李凯,等.一种表贴式永磁电机磁极结构优化研究[J].电机与控制学报,2014,18(5):43-47.
[10] 徐媛媛,葛红娟,荆岩.永磁同步电机偏心磁极优化设计[J].哈尔滨工程大学学报,2013,34(7):874-877.
[11] 罗正豪,井立兵, 高起兴.分段偏心磁极表贴式永磁电机优化设计[J].微特电机,2018,46(10):25-29.
[12] 刘明基,赵伟波,赵海森,等.基于Halbach阵列与组合型磁极相结合的表贴式永磁电机优化设计[J].电机与控制应用,2016,43(2):36-41.
[13] CHEN Z,XIA C,ENG Q,et al. Modeling and analyzing of surface-mounted permanent-magnet synchronous machines with optimized magnetic pole shape[J].IEEE Transactions on Magnetics,2014,50(11):1-4.
[14] LI Y,XING J,WANG T,et al.Programmable design of magnet shape for permanent-magnet synchronous motors with sinusoidal back EMF waveforms[J].IEEE Transactions on Magnetics, 2008,44(9):2163-2167.
[15] 顾其善.永磁电机的卡特系数[J].中小型电机,1986(5):11-14.