表贴式永磁同步电机解析建模与极槽配合选取
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作者单位:

1.重庆大学汽车工程学院;2.重庆交通大学交通运输学院;3.同济大学汽车学院;4.东风小康汽车有限公司

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高性能一体化电驱动总成开发与产业化(cstc2018jszx-cyztzxX0004)


Analytical Modeling and Pole-Slot Combination of Magnetic Field in Surface-mounted Permanent-Magnet Synchronous Motor
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Affiliation:

1.School of Automotive Engineering, Chongqing University;2.College of Traffic &3.Transportation, Chongqing Jiaotong University;4.School of Automotive Studies, Tongji University;5.Dongfeng Xiaokang Automobile Co.,Ltd.

Fund Project:

Development and Industrialization of High-performance Integrated Electric Drive Assembly (cstc2018jszx-cyztzxX0004)

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    摘要:

    合理选取极槽配合是电机设计的关键环节,为解决传统有限元技术重复建模带来的耗时和占资源等问题,建立了永磁同步电机解析模型,来分析不同极槽配合对电机性能的影响。在二维极坐标系,将电机划分成永磁体、气隙、电枢槽和槽开口四类子域,并构建了各子域的拉普拉斯方程或泊松方程,利用分离变量法结合边界条件对各子域进行解析计算,完成电机解析模型的搭建。借助有限元结果验证了该解析模型的正确性,并采用该解析模型研究了不同极槽配合对电机性能的影响。通过对比发现,60槽8极电机的齿槽转矩远小于其他几种,转矩输出特性更好;分数槽配合的负载径向气隙磁密正弦性比整数槽更好,能有效地降低转矩脉动;在一定范围内,多槽结构有利于提升电机的转矩特性。

    Abstract:

    Reasonable selection of pole-slot combination is a key part of electric machinery design. In order to solve the problems of time-consuming and resource-consuming caused by repeated modeling with traditional finite element technology, an analytical model of permanent magnet synchronous motor is established to analyze the influence of different pole-slot combination on motor performance. In 2D polar coordinate system, the motor is divided into four regions: armature slot, stator slot opening, air gap and permanent magnet. Then, the Laplace equation or Poisson equation of each sub-domain is constructed. Through the variable separation method combined with the boundary conditions, the sub-domains are analytically calculated, and the construction of the motor’s analytical model is completed. The correctness of the analytical model is verified by the finite element method. The analytical model is used to study the effects of different pole-slot combination on the performance of the motor. The cogging torque of the 60-slot-8-pole motor is much smaller than the others,and the performance of output torque are better. The load radial air gap flux density of fractional pole-slot combination is more sinusoidal than integer pole-slot combination’s, which can effectively reduce torque ripple. Within a certain range, multi-slot structure is beneficial to increase the performance of motor’s output torque.

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  • 收稿日期:2019-11-07
  • 最后修改日期:2019-12-05
  • 录用日期:2019-12-09
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