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Analytical prediction of electromagnetic performance of dual-stator consequent-pole PM machines based on subdomain model accounting for tooth-tips

Minchen Zhu (College of Electrical Engineering, Zhejiang University, Hangzhou, China and n/a, Halifax, UK)
Lijian Wu (College of Electrical Engineering, Zhejiang University, Hangzhou, China and n/a, Halifax, UK)
Dong Wang (Research Institute of Power Electronics Technology, Navy University of Engineering, Wuhan, China)
Youtong Fang (College of Electric Engineering, Zhejiang University, Hangzhou, China)
Ping Tan (Zhejiang University of Science and Technology, Hangzhou, China)

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering

ISSN: 0332-1649

Article publication date: 13 July 2021

Issue publication date: 20 August 2021

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Abstract

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.

Keywords

Acknowledgements

This work was supported in part by the National Natural Science Foundation of China under Grant 51677169, Grant 51977191, Grant 51637009, Grant 51677171 and Grant 51827810, and in part by the National Key R&D Program of China under Grant 2018YFB1501304.

Citation

Zhu, M., Wu, L., Wang, D., Fang, Y. and Tan, P. (2021), "Analytical prediction of electromagnetic performance of dual-stator consequent-pole PM machines based on subdomain model accounting for tooth-tips", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 40 No. 3, pp. 289-308. https://doi.org/10.1108/COMPEL-01-2020-0063

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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