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Energies 2019, 12(2), 216; https://doi.org/10.3390/en12020216

Comparison of Dual-Permanent-Magnet-Excited Machines and Surface-Mounted Permanent Magnet Machines in Terms of Force

1
Energy and Power Conversion Engineering, Unversity of Science and Technology, Daejeon 34113, Korea
2
Electric Motor Research Center, Korea Electrotechnology Research Institute, Changwon 51543, Korea
3
School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 17546, Korea
*
Author to whom correspondence should be addressed.
Received: 4 December 2018 / Revised: 26 December 2018 / Accepted: 8 January 2019 / Published: 10 January 2019
(This article belongs to the Special Issue Electrical Machine Design)
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Abstract

In this paper, finite element analysis demonstrates the difference between dual-permanent-magnet-excited machines (DPMM) and surface-mounted permanent magnet machines (SPM) in terms of tangential force at the same air gap, diameter, stacking length, and input current. Different from most conventional machines, a novel DPMM has two sets of permanent magnets employed on both stator and rotor. To make a fair comparison, the novel DPMM, based on an original design, is specified to have the same dimensions as a conventional SPM. With the aid of 2D finite element analysis, tangential force generated from the novel DPMM is 167.65% higher than the conventional SPM. To verify the validity of the analyses, a prototype was fabricated and tested. Experiments showed that average deviation was only approximately 1.85%. View Full-Text
Keywords: dual-permanent-magnet-excited machine; surface-mounted permanent magnet machine; force density dual-permanent-magnet-excited machine; surface-mounted permanent magnet machine; force density
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Duong, M.-T.; Kang, D.-H.; Chun, Y.-D.; Woo, B.-C.; Lee, Y.-S.; Wook, H. Comparison of Dual-Permanent-Magnet-Excited Machines and Surface-Mounted Permanent Magnet Machines in Terms of Force. Energies 2019, 12, 216.

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