基于极弧系数选择的直线电动机法向力波动削弱方法  

The Method for Reducing the Normal Force Ripple by Suitable Selection of Pole- Arc Coefficient in Linear Motor

作　　者：夏加宽[1] 宋德贤[1] 沈丽[1] 

机构地区：[1]沈阳工业大学,沈阳110870

出　　处：《微特电机》2014年第3期4-6,20,共4页Small & Special Electrical Machines

基　　金：高等学校博士学科点专项科研基金(20102102110001);国家科技重大专项(2012ZX04001-011-003);辽宁省科技厅重点项目(2011020112-401)

摘　　要：齿槽效应是直线电动机产生法向力波动的主要原因之一。为削弱齿槽效应产生的法向力波动,本文提出了基于麦克斯韦张量法和和傅里叶分解的解析分析方法,明确给出了在电枢开路的情况下齿槽效应产生的法向力波动的解析表达式。以此为基础,研究了基于不同极弧系数选择对直线电动机法向力波动的影响,并提出了极弧系数对法向力波动的确定方法。通过该方法,可以轻松地确定法向力不同极槽配合下的的最佳极弧系数,进而削弱法向力波动产生的影响,最后经过有限元验证,证明该方法是正确有效的。The cogging effect of the linear motor is one of the main causes of the normal force ripple.In order to reduce the cogging effect which generates the normal force ripple,the analytic method of the Fourier decomposition and the Maxwell stress tensor method was used to derive the analytic expression of the single-side flat-plate permanent magnet linear motor＇s （PMLM） normal force in the case of armature open circuit.On the basis of the analytic expression,we studied the different pole-arc coefficients influence on the normal force ripple of the linear motor.And the method of reducing the normal force ripple was proposed based on the different pole-arc coefficients.This method can determine the suitable pole-arc coefficient with the different pole and slot easily,and can weaken the influence of the normal force ripple.Finally,finite element simulation results prove that the proposed method is correct and effective through finite element certification

关 键 词：永磁同步直线电动机 极弧系数 法向力波动 傅里叶分解 齿槽效应 

分 类 号：TM359.4[电气工程—电机]