Purpose

The purpose of this paper is to analytically predict the on-load field distribution and electromagnetic performance (induced voltage, electromagnetic torque, winding inductances and unbalanced magnetic force) of dual-stator consequent-pole permanent magnet (DSCPPM) machines using subdomain model accounting for tooth-tip effect. The finite element (FE) results are presented to validate the accuracy of this subdomain model.

Design/methodology/approach

During the preliminary design and optimization of DSCPPM machines, FE method requires numerous computational resources and can be especially time-consuming. Thus, a subdomain model considering the tooth-tip effect is presented in this paper. The whole field domain is divided into four different types of sub-regions, where the analytical solutions of vector potential in each sub-region can be rapidly calculated. The proposed subdomain model can accurately predict the on-load flux density distributions and electromagnetic performance of DSCPPM machines, which is verified by FE method.

Findings

The radial and tangential components of flux densities in each sub-region of DSCPPM machine can be obtained according to the vector potential distribution, which is calculated based on the boundary and interface conditions using variable separation approach. The tooth-tip effect is investigated as well. Moreover, the phase-induced voltage, winding inductances, electromagnetic torque and X-axis/Y-axis components of unbalanced magnetic forces are calculated and compared by FE analysis, where excellent agreements are consistently exhibited.

Originality/value

The on-load field distributions and electromagnetic performance of DSCPPM machines are analytically investigated using subdomain method, which can be beneficial in the process of initial design and optimization for such DSCPPM machines.

中文翻译：

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基于齿尖子域模型的双定子接极永磁电机电磁性能解析预测

目的

本文的目的是使用子域模型分析预测双定子互极永磁 (DSCPPM) 电机的负载场分布和电磁性能（感应电压、电磁转矩、绕组电感和不平衡磁力）。齿尖效应。有限元 (FE) 结果用于验证此子域模型的准确性。

设计/方法/方法

在 DSCPPM 机器的初步设计和优化过程中，有限元方法需要大量的计算资源，并且可能特别耗时。因此，本文提出了一个考虑齿尖效应的子域模型。整个场域分为四种不同类型的子区域，可以快速计算每个子区域的矢量势解析解。所提出的子域模型可以准确预测 DSCPPM 电机的负载磁通密度分布和电磁性能，并通过有限元方法进行验证。

发现

DSCPPM电机各子区域磁通密度的径向分量和切向分量可以根据矢量势分布得到，该矢量势分布是基于边界和界面条件使用可变分离方法计算的。还研究了齿尖效应。此外，通过有限元分析计算和比较了不平衡磁力的相感应电压、绕组电感、电磁转矩和X轴/ Y轴分量，始终表现出良好的一致性。

原创性/价值

使用子域方法对 DSCPPM 机器的负载场分布和电磁性能进行了分析研究，这有助于此类 DSCPPM 机器的初始设计和优化过程。