Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization

Zhiyuan Ren; Tianyun Liu

doi:doi:10.11648/j.epes.20231203.12

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Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization

Zhiyuan Ren, Tianyun Liu

Published in American Journal of Electrical Power and Energy Systems (Volume 12, Issue 3)

Received: 14 June 2023 Accepted: 29 June 2023 Published: 6 July 2023

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Abstract

This paper takes an external rotor permanent magnet synchronous motor (ERPMM) as the research object, and analyzes the magnetic circuit structure and working principle of the motor. According to the design parameters and design structure of the motor, the motor is analyzed by combining the finite element method and the analytical method. In this paper, increasing the output torque of the motor and reducing the cogging torque are the optimization goals, and the design uses the Halbach magnetization structure as the main method to optimize the design of the motor to form an A-type Halbach magnetized external rotor permanent magnet motor (HERPMMA). On the basis of improving the magnetizing structure, the structure of the permanent magnet motor is parametrically analyzed and optimally designed to form a B-type Halbach magnetized external rotor permanent magnet motor (HERPMMB). In this way, the torque performance of the motor can be further improved on the basis of giving full play to the advantages of Halbach's magnetization structure. The operating performance of the three motors is compared and analyzed, and the optimization results are evaluated by integrating multiple optimization objectives. The results show that the output torque and permanent magnet utilization of HERPMMB increased by 42.88%, and the cogging torque of the motor decreased by 78.63% compared with ERPMM without changing the amount of permanent magnets.

Published in	American Journal of Electrical Power and Energy Systems (Volume 12, Issue 3)
DOI	10.11648/j.epes.20231203.12
Page(s)	51-58
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Permanent Magnet Motor, Halbach Magnetization, Cogging Torque, Torque Output, Structural Optimization

References

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[2]	J. G. W. West, "DC, induction, reluctance and PM motors for electric vehicles," in Power Engineering Journal, vol. 8, no. 2, pp. 77-88, April 1994.
[3]	T. Takahashi, M. Takemoto, S. Ogasawara, W. Hino and K. Takezaki, "Size and Weight Reduction of an In-Wheel Axial-Gap Motor Using Ferrite Permanent Magnets for Electric Commuter Cars," in IEEE Transactions on Industry Applications, vol. 53, no. 4, pp. 3927-3935, July-Aug. 2017.
[4]	Yan he, Yang Lei, Zhang Zuo-peng et al., "Experimental Study on Cold State Rod Dropping of Control Rod Drive Mechanism of High Temperature Gas Cooled Reactor," in Nuclear Science and Engineering 2015, 35 (03): 479-485. (In Chinese with English abstract).
[5]	T. Tymosch, M. Fischer, V. Ketchedjian, Y. Terao and H. Ohsaki, "Analysis of Superconducting Synchronous Motors With Halbach Array Field Excitation," in IEEE Transactions on Applied Superconductivity, vol. 31, no. 2, pp. 1-5, March 2021, Art no. 5200205.
[6]	K. Liu, M. Yin, W. Hua, Z. Ma, M. Lin and Y. Kong, "Design and Analysis of Halbach Ironless Flywheel BLDC Motor/Generators," in IEEE Transactions on Magnetics, vol. 54, no. 11, pp. 1-5, Nov. 2018, Art no. 8109305.
[7]	Wang Xiuping, Jiang Shenglong, Qu Chunyu, "Structural optimization design of Halbach array permanent magnet cursor motor, " in Electric Machines and Control, 2023, 27 (04): 140-147. (In Chinese with English abstract).
[8]	X. Zhang, C. Zhang, J. Yu, P. Du and L. Li, "Analytical Model of Magnetic Field of a Permanent Magnet Synchronous Motor With a Trapezoidal Halbach Permanent Magnet Array," in IEEE Transactions on Magnetics, vol. 55, no. 7, pp. 1-5, July 2019, Art no. 8105205.
[9]	Gao Fengyang, Qi Xiaodong, Li Xiaofeng et al., "Analytical calculation and optimization analysis of electromagnetic performance of Halbach partially-segmented permanent magnet synchronous motors with unequal width and thickness," in Transactions of China Electrotechnical Society 2022, 37 (06): 1398-1414. (In Chinese with English abstract).
[10]	Y. Ni, X. Jiang, B. Xiao and Q. Wang,"Analytical Modeling and Optimization of Dual-Layer Segmented Halbach Permanent-Magnet Machines," in IEEE Transactions on Magnetics, vol. 56, no. 5, pp. 1-11, May 2020, Art no. 8100811.
[11]	B. Koo, J. Kim and K. Nam, "Halbach Array PM Machine Design for High Speed Dynamo Motor," in IEEE Transactions on Magnetics, vol. 57, no. 2, pp. 1-5, Feb. 2021, Art no. 8202105.
[12]	Z. Q. Zhu, Z. P. Xia and D. Howe, "Comparison of Halbach magnetised brushless machines having discrete magnet segments or single ring magnet," 2002 IEEE International Magnetics Conference (INTERMAG), Amsterdam, Netherlands, 2002.
[13]	S.-M. Jang, Sung-Ho Lee, Han-Wook Cho and Sung-Kook Cho, "Analysis of unbalanced force for high-speed slotless permanent magnet machine with Halbach array," in IEEE Transactions on Magnetics, vol. 39, no. 5, pp. 3265-3267, Sept. 2003.
[14]	Wang Peixin, Hua Wei, Hu Mingjin et al.,"Design of performance analysis of Flux-switching permanent magnet machine with cos-charfering rotor," in Proceedings of the CSEE 2022, 42 (22): 8372-8382.. (In Chinese with English abstract).
[15]	HWANG S M, EOM J B, HWANG G B, et al., "Cogging torque and acoustic noise reduction motors permanent magnet by teeth pairing, " in IEEE Transactions on Magnetics, 2000, 36 (5): 3144-3146.

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APA Style

Zhiyuan Ren, Tianyun Liu. (2023). Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization. American Journal of Electrical Power and Energy Systems, 12(3), 51-58. https://doi.org/10.11648/j.epes.20231203.12

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ACS Style

Zhiyuan Ren; Tianyun Liu. Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization. Am. J. Electr. Power Energy Syst. 2023, 12(3), 51-58. doi: 10.11648/j.epes.20231203.12

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AMA Style

Zhiyuan Ren, Tianyun Liu. Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization. Am J Electr Power Energy Syst. 2023;12(3):51-58. doi: 10.11648/j.epes.20231203.12

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@article{10.11648/j.epes.20231203.12,
  author = {Zhiyuan Ren and Tianyun Liu},
  title = {Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {12},
  number = {3},
  pages = {51-58},
  doi = {10.11648/j.epes.20231203.12},
  url = {https://doi.org/10.11648/j.epes.20231203.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20231203.12},
  abstract = {This paper takes an external rotor permanent magnet synchronous motor (ERPMM) as the research object, and analyzes the magnetic circuit structure and working principle of the motor. According to the design parameters and design structure of the motor, the motor is analyzed by combining the finite element method and the analytical method. In this paper, increasing the output torque of the motor and reducing the cogging torque are the optimization goals, and the design uses the Halbach magnetization structure as the main method to optimize the design of the motor to form an A-type Halbach magnetized external rotor permanent magnet motor (HERPMMA). On the basis of improving the magnetizing structure, the structure of the permanent magnet motor is parametrically analyzed and optimally designed to form a B-type Halbach magnetized external rotor permanent magnet motor (HERPMMB). In this way, the torque performance of the motor can be further improved on the basis of giving full play to the advantages of Halbach's magnetization structure. The operating performance of the three motors is compared and analyzed, and the optimization results are evaluated by integrating multiple optimization objectives. The results show that the output torque and permanent magnet utilization of HERPMMB increased by 42.88%, and the cogging torque of the motor decreased by 78.63% compared with ERPMM without changing the amount of permanent magnets.},
 year = {2023}
}

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TY  - JOUR
T1  - Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization
AU  - Zhiyuan Ren
AU  - Tianyun Liu
Y1  - 2023/07/06
PY  - 2023
N1  - https://doi.org/10.11648/j.epes.20231203.12
DO  - 10.11648/j.epes.20231203.12
T2  - American Journal of Electrical Power and Energy Systems
JF  - American Journal of Electrical Power and Energy Systems
JO  - American Journal of Electrical Power and Energy Systems
SP  - 51
EP  - 58
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20231203.12
AB  - This paper takes an external rotor permanent magnet synchronous motor (ERPMM) as the research object, and analyzes the magnetic circuit structure and working principle of the motor. According to the design parameters and design structure of the motor, the motor is analyzed by combining the finite element method and the analytical method. In this paper, increasing the output torque of the motor and reducing the cogging torque are the optimization goals, and the design uses the Halbach magnetization structure as the main method to optimize the design of the motor to form an A-type Halbach magnetized external rotor permanent magnet motor (HERPMMA). On the basis of improving the magnetizing structure, the structure of the permanent magnet motor is parametrically analyzed and optimally designed to form a B-type Halbach magnetized external rotor permanent magnet motor (HERPMMB). In this way, the torque performance of the motor can be further improved on the basis of giving full play to the advantages of Halbach's magnetization structure. The operating performance of the three motors is compared and analyzed, and the optimization results are evaluated by integrating multiple optimization objectives. The results show that the output torque and permanent magnet utilization of HERPMMB increased by 42.88%, and the cogging torque of the motor decreased by 78.63% compared with ERPMM without changing the amount of permanent magnets.
VL  - 12
IS  - 3
ER  -

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Author Information

Zhiyuan Ren

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
Tianyun Liu

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China

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APA Style

Zhiyuan Ren, Tianyun Liu. (2023). Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization. American Journal of Electrical Power and Energy Systems, 12(3), 51-58. https://doi.org/10.11648/j.epes.20231203.12

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ACS Style

Zhiyuan Ren; Tianyun Liu. Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization. Am. J. Electr. Power Energy Syst. 2023, 12(3), 51-58. doi: 10.11648/j.epes.20231203.12

Copy | Download

AMA Style

Zhiyuan Ren, Tianyun Liu. Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization. Am J Electr Power Energy Syst. 2023;12(3):51-58. doi: 10.11648/j.epes.20231203.12

Copy | Download

@article{10.11648/j.epes.20231203.12,
  author = {Zhiyuan Ren and Tianyun Liu},
  title = {Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {12},
  number = {3},
  pages = {51-58},
  doi = {10.11648/j.epes.20231203.12},
  url = {https://doi.org/10.11648/j.epes.20231203.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20231203.12},
  abstract = {This paper takes an external rotor permanent magnet synchronous motor (ERPMM) as the research object, and analyzes the magnetic circuit structure and working principle of the motor. According to the design parameters and design structure of the motor, the motor is analyzed by combining the finite element method and the analytical method. In this paper, increasing the output torque of the motor and reducing the cogging torque are the optimization goals, and the design uses the Halbach magnetization structure as the main method to optimize the design of the motor to form an A-type Halbach magnetized external rotor permanent magnet motor (HERPMMA). On the basis of improving the magnetizing structure, the structure of the permanent magnet motor is parametrically analyzed and optimally designed to form a B-type Halbach magnetized external rotor permanent magnet motor (HERPMMB). In this way, the torque performance of the motor can be further improved on the basis of giving full play to the advantages of Halbach's magnetization structure. The operating performance of the three motors is compared and analyzed, and the optimization results are evaluated by integrating multiple optimization objectives. The results show that the output torque and permanent magnet utilization of HERPMMB increased by 42.88%, and the cogging torque of the motor decreased by 78.63% compared with ERPMM without changing the amount of permanent magnets.},
 year = {2023}
}

Copy | Download

TY  - JOUR
T1  - Structural Optimization of External Rotor Permanent Magnet Motor Based on Halbach Magnetization
AU  - Zhiyuan Ren
AU  - Tianyun Liu
Y1  - 2023/07/06
PY  - 2023
N1  - https://doi.org/10.11648/j.epes.20231203.12
DO  - 10.11648/j.epes.20231203.12
T2  - American Journal of Electrical Power and Energy Systems
JF  - American Journal of Electrical Power and Energy Systems
JO  - American Journal of Electrical Power and Energy Systems
SP  - 51
EP  - 58
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20231203.12
AB  - This paper takes an external rotor permanent magnet synchronous motor (ERPMM) as the research object, and analyzes the magnetic circuit structure and working principle of the motor. According to the design parameters and design structure of the motor, the motor is analyzed by combining the finite element method and the analytical method. In this paper, increasing the output torque of the motor and reducing the cogging torque are the optimization goals, and the design uses the Halbach magnetization structure as the main method to optimize the design of the motor to form an A-type Halbach magnetized external rotor permanent magnet motor (HERPMMA). On the basis of improving the magnetizing structure, the structure of the permanent magnet motor is parametrically analyzed and optimally designed to form a B-type Halbach magnetized external rotor permanent magnet motor (HERPMMB). In this way, the torque performance of the motor can be further improved on the basis of giving full play to the advantages of Halbach's magnetization structure. The operating performance of the three motors is compared and analyzed, and the optimization results are evaluated by integrating multiple optimization objectives. The results show that the output torque and permanent magnet utilization of HERPMMB increased by 42.88%, and the cogging torque of the motor decreased by 78.63% compared with ERPMM without changing the amount of permanent magnets.
VL  - 12
IS  - 3
ER  -

Copy | Download