磁极结构对圆筒型直线发电机的性能影响  

Effect of the pole structure on the performance of tubular permanent magnet linear generator

作　　者：郭金钢 张博[1] 唐家勇 GUO Jin-gang;ZHANG Bo;TANG Jia-yong(School of Electronic Information,Xi’an Polytechnic University,Xi’an 710699,China)

机构地区：[1]西安工程大学电子信息学院,陕西西安710699

出　　处：《磁性材料及器件》2025年第1期33-39,共7页Journal of Magnetic Materials and Devices

摘　　要：针对电机制造过程存在磁极倒角与圆角结构对电机性能的影响,通过建立圆筒型直线发电机(Tubular Permanent Magnet Linear Generator, TPMLG)的解析模型,利用标量磁位分离变量法对两种磁极结构下的TPMLG的磁场进行解析计算,并建立了矩形磁极、倒角磁极、圆角磁极三种磁极结构的仿真模型。结果表明,倒角磁极的气隙磁密和反电动势波形谐波畸变率较高;圆角磁极结构的电机定位力较小,反电动势波形更接近于正弦性分布。对倒角与圆角两种磁极结构的气隙磁密进行了解析计算,并与有限元仿真结果进行对比验证。通过仿真分析得到了三种磁极结构对电机的气隙磁密、反电动势波形及其谐波畸变率和定位力的影响,为电机动子选择提供了依据。To determine the influence of chamfered and rounded magnetic poles on the performance of motors in the manufacturing process of motors, the analytical model of tubular permanent magnet linear generator(TPMLG) is established, the magnetic field of TPMLG with two magnetic pole structures is analytically calculated by using the scalar magnetic separation of variables method, and the simulation models of three magnetic pole structures, rectangular magnetic pole, chamfered magnetic pole and rounded magnetic pole, are established. The results show that the air-gap magnetization and the harmonic distortion rate of the reverse electromotive force waveform are higher for the chamfered pole;the motor positioning force is smaller for the rounded pole structure, and the waveform of the reverse electromotive force is closer to the sinusoidal distribution. The air gap magnetization of the chamfered and rounded pole structures is analytically calculated and compared with the finite element simulation results for verification. The effects of the three pole structures on the air-gap magnetism, the reverse electromotive force waveform and its harmonic distortion rate, and the positioning force of the motor are obtained through the simulation analysis, which provide a basis for the selection of the motor.

关 键 词：圆筒型直线发电机 磁极结构 磁场解析 有限元分析 定位力 

分 类 号：TM359.4[电气工程—电机]