内置式永磁同步电机气隙磁密与漏磁解析计算  

Analytical Calculation of Air-Gap Flux Density and Flux Leakage of Built-In Permanent Magnet Synchronous Motor

作　　者：张明强 于慎波[1] 翟凤晨 窦汝桐 ZHANG Ming-qiang;YU Shen-bo;ZHAI Feng-chen;DOU Ru-tong(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870

出　　处：《机械工程与自动化》2022年第5期14-16,19,共4页Mechanical Engineering & Automation

基　　金：国家自然科学基金资助项目(51175350);沈阳市科技计划项目(F15-199-1-13)。

摘　　要：为了分析转子具有隔磁桥的内置式永磁同步电机的空载气隙磁场,基于改进等效磁网络法进行了气隙磁密与漏磁解析计算。考虑到隔磁桥造成的磁路变化,分别计算了相邻两永磁体磁路等效磁阻、永磁体端部磁路等效磁阻、永磁体自身磁阻与主磁通和漏磁通。针对原有气隙磁阻引入了卡特系数,计算了定子开槽影响的等效气隙长度,进而计算出一个定子齿下的相对气隙磁导函数。用改进等效磁网络法分析了电机空载作用下的气隙磁场,并与有限元法计算结果进行了对比,验证了改进等效磁网络算法的准确性。In order to analyze the no-load air-gap magnetic field of the built-in permanent magnet synchronous motor with a magnetic isolation bridge in the rotor, based on the improved equivalent magnetic network method, the air-gap flux density and magnetic flux leakage are calculated analytically. Considering the change of the magnetic circuit caused by the magnetic isolation bridge, the equivalent magnetic resistance of the magnetic circuit of two adjacent permanent magnets, the equivalent magnetic resistance of the magnetic circuit at the end of the permanent magnet, the magnetic resistance of the permanent magnet itself, the main magnetic flux and the leakage magnetic flux are calculated respectively. The Carter’s coefficient was introduced for the original air-gap reluctance, and the equivalent air-gap length affected by the slotting of the stator was calculated, and then the relative air-gap permeance function under a stator tooth was calculated. The air-gap magnetic field under no-load action of the motor is analyzed by the improved equivalent magnetic network method, and the calculation results of the finite element method are compared to verify the accuracy of the improved equivalent magnetic network algorithm.

关 键 词：内置式永磁同步电机 气隙磁密 漏磁解析 等效磁网络法 

分 类 号：TM351[电气工程—电机]