基于磁极分块的永磁电机气隙磁场解析计算  

Analytical Calculation of Air Gap Magnetic Field for Permanent Magnet Machines Based on Pole Partition Processing

作　　者：李京泽 吴新振 陈春涛 LI Jingze;WU Xinzhen;CHEN Chuntao(College of Electrical Engineering,Qingdao University,Qingdao 266071,Shandong Province,China;School of Automation,Qingdao University,Qingdao 266071,Shandong Province,China)

机构地区：[1]青岛大学电气工程学院,山东省青岛市266071 [2]青岛大学自动化学院,山东省青岛市266071

出　　处：《中国电机工程学报》2021年第18期6390-6398,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52037005)。

摘　　要：为了简便、精确地分析偏心削极表贴磁极的永磁电机空载气隙磁场,基于永磁体等效分块处理并结合子域模型提出一种磁场解析计算方法,解决了磁极不等厚与平行充磁问题。所用方法能考虑定子开槽影响与永磁体实际磁导率,且通过求解子域模型直接得到空载气隙磁密的基波与各次谐波分量。采用有限元法直接计算气隙磁场,解析法与有限元法计算的空载气隙磁密吻合,验证了解析方法的准确性。对一台九相永磁电机样机进行实验,所测空载感应电势与解析模型计算值较吻合,验证了所用分析方法的正确性。In order to easily and accurately analyze the no-load air gap magnetic field of surface-mounted permanent magnet motors with eccentrically cut poles, a magnetic field analytical calculation method was proposed based on equivalent block of permanent magnet(PM)s and subdomain model, which solves the problem of unequal thickness and parallel magnetization. The method can consider the effect of stator slotting and the actual magnetic permeability of the PM, and the fundamental and each harmonic component of no-load air gap magnetic density can be directly obtained. The air gap magnetic field is directly calculated by the finite element method, and the analytical method is in agreement with the results of the finite element method, which verifies the accuracy of the analytical method. An experiment on a nine-phase permanent magnet motor prototype was conducted. The measured no-load back EMF is consistent with the calculated value of the analytical model, which verifies the correctness of the analytical method used.

关 键 词：永磁电机 偏心削极磁极 磁极分块处理 子域模型 空载气隙磁场 

分 类 号：TM351[电气工程—电机]