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A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor
Article

Investigation of an Interior Micro Permanent Magnet Synchronous Motor

1
Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, 415 Jian Gong Rd., Sanmin Dist., Kaohsiung 80778, Taiwan
2
Department of Electrical and Mechanical Engineering, Hai Phong University, 171 Phan Dang Luu Road, Kien An District, Hai Phong City 180000, Vietnam
*
Author to whom correspondence should be addressed.
Academic Editors: Ju Lee and Changsung Jin
Energies 2021, 14(14), 4172; https://doi.org/10.3390/en14144172
Received: 21 June 2021 / Revised: 3 July 2021 / Accepted: 8 July 2021 / Published: 10 July 2021
(This article belongs to the Special Issue New Insights into Permanent Magnet Motors)
This study describes the development of the world’s smallest interior permanent magnet synchronous motor (IPMSM) to increase the torque density of micromotors. The research evaluates the feasibility of the miniaturization of IPMSM since recent studies in this area focus on medium to large size compressor and traction motor applications. The standard-type and spoke-type IPMSM were selected for ease of micro machining. In order to surpass the performance of an inset motor of the same size used in previous research, the interior motors were designed with a different slot pole number, permanent magnet shape and rotor structure. Two types of interior motors were manufactured and tested to compare their performance. It was shown that the spoke-type interior motor had a better output torque, while the standard-type interior motor had a lower torque ripple, and both motors matched the specifications of commercially available motors. To achieve a higher torque density, the IPMSM designs increased the slot pole number from 6 slots 4 poles to 9 slots 6 poles. The torque density of the spoke-type motor was increased by 48% compared to the inset motor. The disadvantage is that the new design has a greater number of parts and smaller size, resulting in difficulties in manufacturing and assembly. View Full-Text
Keywords: interior permanent magnet synchronous motor; miniaturization; standard-type and spoke-type interior permanent magnet synchronous motor; miniaturization; standard-type and spoke-type
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MDPI and ACS Style

Pang, D.-C.; Shi, Z.-J.; Chang, Y.-H.; Huang, H.-C.; Bui, G.-T. Investigation of an Interior Micro Permanent Magnet Synchronous Motor. Energies 2021, 14, 4172. https://doi.org/10.3390/en14144172

AMA Style

Pang D-C, Shi Z-J, Chang Y-H, Huang H-C, Bui G-T. Investigation of an Interior Micro Permanent Magnet Synchronous Motor. Energies. 2021; 14(14):4172. https://doi.org/10.3390/en14144172

Chicago/Turabian Style

Pang, Da-Chen, Zhen-Jia Shi, Young-Ho Chang, Hua-Chih Huang, and Gia-Thinh Bui. 2021. "Investigation of an Interior Micro Permanent Magnet Synchronous Motor" Energies 14, no. 14: 4172. https://doi.org/10.3390/en14144172

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