低速大力矩圆筒永磁直线电机齿槽力分析*

作者：陈卫宝，范承志，叶云岳 日期：2010-03-26/span> 浏览：3731 查看PDF文档

低速大力矩圆筒永磁直线电机齿槽力分析*

陈卫宝，范承志，叶云岳
（浙江大学 电气工程学院，浙江 杭州 310027）

摘要：为削弱圆筒永磁直线电机的齿槽力，采用了一种基于能量法和傅里叶分解的解析分析方法，推导出了圆筒直线电机与结构参数有关的齿槽力表达式。在此基础上，研究了定子极距所作的微小改变和极弧系数的优化选择对齿槽力的影响，提出了减少电机齿槽力的优化方案，并利用有限元法对其进行了验证。通过抽油机实际测试，其测试结果证明所提出的方法是正确有效的。
关键词：永磁直线电机；齿槽力；圆筒型；二维有限元
中图分类号：TM351文献标识码：A文章编号：1001-4551(2010)02-0086-04

Cogging force analysis of a low speed and high torque tubular permanent magnet linear motor
CHEN Weibao, FAN Chengzhi, YE Yunyue
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: Aiming at reducing cogging force in tubular permanent magnet linear motors, an analytical method based on energy method and Fourier series expansion was adopted, the expression of cogging force was deduced which is related with structure parameters of the motor. Based on these expressions, the effect of changing the stator pole distance and choosing the suitable polearc coefficient on cogging force were studied, a method was proposed for reducing cogging force. The validity of the proposed method was verified by 2D finite element analysis and the test of pumping unit. The result shows that the method is correct and effective.
Key words: permanent magnet linear motor; cogging force; tubular; 2D finite element analysis