永磁游标直线电机磁场解析计算

发布时间：2018-11-07 17:00

【摘要】：永磁游标直线电机(linear permanent magnet vernier motor,LPMVM)依靠磁场调制原理工作,其电枢开槽引起气隙磁导变化,为考虑齿槽效应的影响,将其气隙磁场等效为无槽气隙磁场与有槽时气隙相对磁导函数共同作用结果。用气隙磁导波法分析其基本工作机理,给出结构关系式。用分层模型法建立无槽LPMVM求解场域矢量磁位解析模型,推导出各区域磁场解析表达式。结合气隙相对磁导函数建立考虑齿槽效应时的LPMVM磁场解析模型,计算出考虑齿槽效应时气隙磁密分布曲线。解析解与有限元解结果表明:无槽时气隙磁密在切向分量和法向分量计算准确,考虑齿槽效应后基于气隙相对磁导函数的磁场解析模型适用于求解气隙磁密法向分量,且主要谐波磁场与永磁体极对数和电枢绕组极对数有关。
[Abstract]:Permanent magnet Vernier linear motor (linear permanent magnet vernier motor,LPMVM) works on the principle of magnetic field modulation. The armature slot causes the change of air gap magnetic conductivity. The air-gap magnetic field is equivalent to the air-gap magnetic field without grooving and acting on the air-gap relative magnetic conductivity function when the air gap is slotted. The air gap magnetic guided wave method is used to analyze its basic working mechanism and the structural relationship is given. In this paper, an analytical model of the field vector magnetic potential is established by using the layered model method, and the analytical expressions of the magnetic field in each region are derived by using the slotted LPMVM. Based on the relative magnetic conductivity function of air gap, an analytical model of LPMVM magnetic field considering slot effect is established, and the magnetic density distribution curve of air gap considering slot effect is calculated. The results of analytical solution and finite element solution show that the calculation of air gap magnetic density in tangential component and normal component is accurate, and the magnetic field analytical model based on the relative magnetic conductivity function of air gap is suitable for solving the normal component of air gap magnetic density after considering the tooth slot effect. The main harmonic magnetic field is related to the logarithm of permanent magnet pole and armature winding pole.
【作者单位】：郑州轻工业学院电气信息工程学院;郑州轻工业学院机电工程学院;郑州大学电气工程学院;
【基金】：国家自然科学基金(51607158) 郑州轻工业学院博士科研基金(2016BSJJ005) 河南省高等学校重点科研项目(18A470007)
【分类号】：TM359.4

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