volume | PIER Journals

Abstract

Field modulation magnetic gear is a transmission device with broad development prospects. It has the advantages of no friction, no pollution, low maintenance, and easy installation. Magnetic gear models with different gear ratios are established. The input and output torque waveforms of different models are compared. The influences of the number of pole pairs of the inner rotor (P₁) and the number of pole pairs of the outer rotor (P₂) on torque ripple are analyzed. According to the principle of magnetic field modulation, the torque ripple of magnetic gear is greatly affected by P₁ and P₂. Research results show that the torque ripple can be effectively reduced by selecting the magnetic gear with P₁ = 4, P₁/P₂ = 1/(n+0.25) or 1/(n+0.75) (n is a natural number).

1. Rasmussen, P. O., T. O. Andersen, F. T. Jorgensen, and O. Nielsen, "Development of a high-performance magnetic gear," IEEE Transactions on Industry Applications, Vol. 3, No. 41, 770, 2005. Google Scholar

2. Chen, M., K. Chau, W. Li, C. Liu, and C. Qiu, "Design and analysis of a new magnetic gear with multiple gear ratios," IEEE Transactions on Applied Superconductivity, Vol. 3, No. 24, 1-4, 2014. Google Scholar

3. Jing, L., T. Zhang, Y. Gao, R. Qu, Y. Huang, and T. Ben, "A novel HTS modulated coaxial magnetic gear with eccentric structure and Halbach arrays," IEEE Transactions on Appiled Superconductivity, Vol. 5, No. 29, 1-5, 2019.
doi:10.1109/TASC.2019.2892152 Google Scholar

4. Jing, L., L. Liu, M. Xiong, and D. Feng, "Parameters analysis and optimization design for a concentric magnetic gear based on sinusoidal magnetizations," IEEE Transactions on Applied Superconductivity, Vol. 5, No. 24, 1-5, 2014. Google Scholar

5. Atallah, K. and D. Howe, "A novel high-performance magnetic gear," IEEE Transactions on Magnetics, Vol. 4, No. 37, 2844-2846, 2002. Google Scholar

6. Xia, D., "Damping system of permanent magnet gear and its application in contactless drive device of artificial heart," Transactions of China Electrotechnical Society, Vol. 2, No. 28, 91-96, 2013. Google Scholar

7. Jian, L., K. T. Chau, and J. Z. Jiang, "A magnetic-geared outer-rotor permanent-magnet brushless machine for wind power generation," IEEE Transactions on Industry Applications, Vol. 3, No. 45, 954-962, 2009.
doi:10.1109/TIA.2009.2018974 Google Scholar

8. Wang, L. L., J. X. Shen, P. C. K. Luk, W. Z. Fei, C. F. Wang, and H. Hao, "Development of a magnetic-geared permanent-magnet brushless motor," IEEE Transactions on Magnetics, Vol. 10, No. 45, 4578-4581, 2009.
doi:10.1109/TMAG.2009.2023071 Google Scholar

9. Chau, K. T., D. Zhang, J. Z. Jiang, C. Liu, and Y. Zhang, "Design of a magnetic-geared outer-rotor permanent-magnet brushless motor for electric vehicles," IEEE Transactions on Magnetics, Vol. 6, No. 43, 2504-2506, 2007.
doi:10.1109/TMAG.2007.893714 Google Scholar

10. Pakdelian, S., N. W. Frank, and H. A. Toliyat, "Magnetic design aspects of the trans-rotary magnetic gear," IEEE Transactions on Energy Conversion, Vol. 1, No. 30, 41-50, 2012. Google Scholar

11. Lee, J. and J. Chang, "Analysis of the vibration characteristics of coaxial magnetic gear," IEEE Transactions on Magnetics, Vol. 53, No. 6, 8105704, 2017. Google Scholar

12. Jing, L., L. Liu, M. Xiong, and D. Feng, "Parameters analysis and optimization design for a concentric magnetic gear based on sinusoidal magnetizations," IEEE Transactions on Applied Superconductivity, Vol. 5, No. 24, 1-5, 2014. Google Scholar

13. Kim, S. J., E. J. Park, S. Y. Jung, and Y. J. Kim, "Transfer torque performance comparison in coaxial magnetic gears with different flux-modulator shapes," IEEE Transactions on Magnetics, Vol. 6, No. 53, 1-4, 2017. Google Scholar

14. Fu, W. N. and L. Li, "Optimal design of magnetic gears with a general pattern of permanent magnet arrangement," IEEE Transactions on Applied Superconductivity, Vol. 7, No. 26, 1-5, 2016. Google Scholar

15. Ge, Y., Z. Yuan, P. Zhao, K. Zhao, and F. Fang, "Modeling and analysis of concentric permanent magnet gear startup characteristics," China Mechanical Engineering, Vol. 13, No. 29, 1513-1518+1523, 2008. Google Scholar

16. Yin, X., P. D. Pfister, and Y. Fang, "A novel magnetic gear: Toward a higher torque density," IEEE Transactions on Magnetics, Vol. 11, No. 51, 1-4, 2015.
doi:10.1109/TMAG.2015.2436058 Google Scholar

17. Tian, Y., G. Liu, W. Zhao, and J. Ji, "Design and analysis of coaxial magnetic gears considering rotor losses," IEEE Transactions on Magnetics, Vol. 11, No. 51, 1-4, 2015. Google Scholar

18. Li, X., M. Cheng, and Y. Wang, "Analysis, design and experimental verification of a coaxial magnetic gear using stationary permanent-magnet ring," IET Electric Power Applications, Vol. 2, No. 12, 231-238, 2018.
doi:10.1049/iet-epa.2017.0382 Google Scholar

19. Jing, L., Z. Luo, L. Liu, and Q. Gao, "Optimization design of magnetic gear based on genetic algorithm toolbox of Matlab," J. Electr. Eng. Technol., Vol. 5, No. 11, 1202-1209, 2016.
doi:10.5370/JEET.2016.11.5.1202 Google Scholar

20. Jian, L. and K. T. Chau, "A coaxial magnetic gear with Halbach permanent-magnet arrays," IEEE Transactions on Energy Conversion, Vol. 2, No. 25, 328, 2010. Google Scholar

Dr. Libing Jing

Dr. Zhangxian Huang