Abstract
The ratio between rotor poles and stator winding poles plays a deciding role in the performance of Vernier machines. Therefore, it is very important to analyze the effect of pole ratio on the electromagnetic torque performance of permanent-magnet Vernier machine. Dual-airgap spoke-type permanent-magnet Vernier machines (PMVMs) are becoming popular due to their low speed and high torque characteristics in the direct drive applications. This paper presents the effect of pole ratio on the performance of dual-airgap spoke-type PMVM. The performance parameters such as torque ripple, average torque, torque density and efficiency are analyzed by the variation of design parameters such as stator and rotor pole numbers and winding pole numbers, while keeping the same outer dimensions, similar magnet volumes and same airgap lengths in all the models. The electromagnetic torque characteristics are analyzed with the variation of pole ratios until the model reaches the maximum torque performance at a specific combination of rotor and stator poles. 2D-finite element method is used to analyze the performance of the model and verify the effect of pole ratio on the torque performance of dual-airgap spoke-type PMVM.
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References
Gerber S, Wang R (2015) Design and evaluation of a PM Vernier machine. In: 2015 IEEE energy conversion congress and exposition (ECCE), Montreal, QC, pp 5188–5194
L. Shentu, Y. Ma, J. Wang, J. Zhou, L. Zhou and K. Qian, "Design and Analysis of a Direct-Drive Permanent Magnet Vernier Motor for Electric Drilling Applications," 2018 21st International Conference on Electrical Machines and Systems (ICEMS), Jeju, 2018, pp. 81–86.
Liu Y, Zhu ZQ (2017) Magnetic gearing effect in Vernier permanent magnet synchronous machines. In: 2017 IEEE energy conversion congress and exposition (ECCE), Cincinnati, OH, pp 5025–5032
Byungtaek Kim and Lipo, T.A., "Operation and Design Principles of a PM Vernier Motor" in Proc. IEEE Eng. Con. Congr. & Exp. Sep. 2013, pp.5034 - 5041.
R. Qu, D. Li, and J. Wang, "Relationship between magnetic gears and Vernier machines," in ICEMS, pp. 1–6, 2011.
P. R. M. Brooking and M. A. Mueller, "Power conditioning of the output from a linear Vernier hybrid permanent magnet generator for use in direct drive wave energy converters," IEE Proc.–Gener. Transm. Distrib., vol. 152, no. 5, Sept. 2005, pp. 673–681.
Jiangui Li, K.T.Chau, J.Z.Jiang, Chunhua Liu and Wenlong Li, "A new efficient permanent-magnet Vernier machine for wind power generation, " IEEE Trans. Magn., vol. 46, no. 6, pp.1475–1478, Jun. 2010.
Niu S, Ho SL, Fu WN, Wang LL (2010) Quantitative comparison of novel Vernier permanent magnet machines. IEEE Trans Magn 46(6):2032–2035
A. Toba and T.A. Lipo, "Novel dual-excitation permanent magnet Vernier machine," Conference Record, 34th IAS Annual Meeting, vol. 4, pp. 2539–2544, 1999.
Siddiqi MR, Zhao W, Lipo TA, Kwon BI (2017) Performance Comparison of Dual Airgap and Single Airgap Spoke-Type Permanent-Magnet Vernier Machines. IEEE Trans Magn 53(6):1–4
Toba A, Lipo TA (2000) Generic torque-maximizing design methodology of surface permanent-magnet Vernier machine. IEEE Trans Ind Appl 36(6):1539–1546
Chung S, Kim J, Woo B, Hong D, Lee J, Koo D (2011) A novel design of modular three-phase permanent magnet Vernier machine with consequent pole rotor. IEEE Trans Magn 47(10):4215–4218
Baloch N, Kwon B, Gao Y (2018) Low cost high torque density dual-stator permanent magnet Vernier machine. In: 2018 IEEE International Magnetics Conference (INTERMAG), Singapore, p 1
X. Li, K. T. Chau, and M. Cheng, "Comparative analysis and experimental verification of an effective permanent-magnet Vernier machine," IEEE Trans. Magn., vol. 51, no. 7, Art. no. 8203009, 2015.
F. Zhao, T. A. Lipo, B. I. Kwon “Magnet flux focusing design of double stator permanent magnet Vernier machine,” in Conf. on the Comput. of Elec. Fields, Budapest, Hungary, 2013, pp. 1–4.
Kim B, Lipo TA (2014) Analysis of a PM Vernier Motor with Spoke Structure. Pittsburgh, PA, IEEE Energy Conversion Congress and Exposition, pp 5034–5041
Zhao F, Lipo TA, Kwon BI (2014) “A Novel Dual-Stator Axial-Flux Spoke-Type Permanent Magnet Vernier Machine for Direct Drive Applications”, in IEEE Intern. Mag. Conf, Dresden, Germany, pp 1–4
L. Wu, R. Qu, D. Li, and Y. Gao, "Influence of pole ratio and winding pole numbers on performance and optimal design parameters of surface permanent-magnet Vernier machines," IEEE Trans. Ind. Appl., vol. 51, no. 5, pp. 3707–3715, Sept.-Oct. 2015.
D. Kumar K.P et al., "Influence of Demagnetization on Selecting the Optimum Slot/Pole Number Combination for 3MW Surface Mounted Permanent Magnet Vernier Machine," 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China, 2019, pp. 1–6.
Yang Z, Heyun L, Shuhua F, Yunkai H (2016) Comparison and analysis of dual stator permanent magnet Vernier machines with different pole/slot combinations for low speed direct drive applications. Int J Appl Electrom 50(4):617–626
Z. S. Du and T. A. Lipo, “High torque density ferrite permanent magnet Vernier motor analysis and design with demagnetization consideration,” in Proc. IEEE Energy Convers. Congr. Expo. (ECCE), Sep. 2015, pp. 6082–6089.
D. Li and R. Qu, “Sinusoidal back-EMF of Vernier permanent magnet machines,” in International Conference on Electrical Machines and Systems (ICEMS), Oct 2012, pp. 1–6.
Zhu ZQ, Howe D (2000) Influence of design parameters on cogging torque in permanent magnet machines. IEEE Eng Con 15(4):407–412
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This work was supported by the Incheon National University under Research Grant 2018-0490.
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Siddiqi, M.R., Ullah, Z. & Hur, J. Torque characteristics analysis of dual-airgap spoke-type permanent-magnet Vernier machine considering pole ratio effect. Electr Eng 102, 1405–1412 (2020). https://doi.org/10.1007/s00202-020-00962-3
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DOI: https://doi.org/10.1007/s00202-020-00962-3