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Energies
Volume 14
Issue 11
10.3390/en14113073
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Article

Effect of Pole and Slot Combination on the AC Joule Loss of Outer-Rotor Permanent Magnet Synchronous Motors Using a High Fill Factor Machined Coil

by
Soo-Hwan Park
1,
Eui-Chun Lee
1,2,
Gi-Ju Lee
2,3,
Soon-O. Kwon
2 and
Myung-Seop Lim
1,*
1
Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea
2
Safety System R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Korea
3
Department of Electrical Engineering, Kyungpook National University, Daegu 41566, Korea
*
Author to whom correspondence should be addressed.
Energies 2021, 14(11), 3073; https://doi.org/10.3390/en14113073
Submission received: 19 April 2021 / Revised: 11 May 2021 / Accepted: 22 May 2021 / Published: 25 May 2021
(This article belongs to the Special Issue Analysis, Design and Optimization of Electric Machines)
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Abstract

This paper proposes a design guideline for selecting the pole and slot combination of an outer-rotor permanent magnet synchronous motor (PMSM) using a maximum slot occupation (MSO) coil. Because the MSO coil has a large conductor area, the AC Joule loss in the conductors may be increased at high frequencies. To ensure high-efficiency for the PMSM, it is necessary to reduce the loss. Thus, it is important to select the pole- and slot- combination that has the minimum AC Joule loss. The loss is caused by skin/proximity effects and variations in the slot leakage flux. The skin effect is due to the armature winding and the variation in the slot leakage flux is due to the field flux. A method for separating the AC Joule loss due to each component using the frozen permeability method is proposed. Based on the proposed method, the effect of each cause on the loss at various pole- and slot- combinations is analyzed in this study.
Keywords: AC Joule loss; frozen permeability; MSO coil; outer-rotor; pole and slot combination AC Joule loss; frozen permeability; MSO coil; outer-rotor; pole and slot combination

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MDPI and ACS Style

Park, S.-H.; Lee, E.-C.; Lee, G.-J.; Kwon, S.-O.; Lim, M.-S. Effect of Pole and Slot Combination on the AC Joule Loss of Outer-Rotor Permanent Magnet Synchronous Motors Using a High Fill Factor Machined Coil. Energies 2021, 14, 3073. https://doi.org/10.3390/en14113073

AMA Style

Park S-H, Lee E-C, Lee G-J, Kwon S-O, Lim M-S. Effect of Pole and Slot Combination on the AC Joule Loss of Outer-Rotor Permanent Magnet Synchronous Motors Using a High Fill Factor Machined Coil. Energies. 2021; 14(11):3073. https://doi.org/10.3390/en14113073

Chicago/Turabian Style

Park, Soo-Hwan, Eui-Chun Lee, Gi-Ju Lee, Soon-O. Kwon, and Myung-Seop Lim. 2021. "Effect of Pole and Slot Combination on the AC Joule Loss of Outer-Rotor Permanent Magnet Synchronous Motors Using a High Fill Factor Machined Coil" Energies 14, no. 11: 3073. https://doi.org/10.3390/en14113073

APA Style

Park, S.-H., Lee, E.-C., Lee, G.-J., Kwon, S.-O., & Lim, M.-S. (2021). Effect of Pole and Slot Combination on the AC Joule Loss of Outer-Rotor Permanent Magnet Synchronous Motors Using a High Fill Factor Machined Coil. Energies, 14(11), 3073. https://doi.org/10.3390/en14113073

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