volume | PIER Journals

Abstract

A novel variable flux permanent magnet vernier machine (VFPMVM) is proposed by introducing the concept of hybrid excitation, and its flux modulation poles (FMPs) and excitation winding are emplaced in stator teeth and the adjacent FMPs, respectively. It can offer several merits, such as wide speed range operation through the processing of flux-enhancing and flux-weakening without increasing machine bulk, as well as the numbers of stator slot and rotor pole. Moreover, as one sort of flux modulation machine based on magnetic field modulation effect, VFPMVM features low speed, large torque, simpler mechanical structure and better utilization of PM materials than traditional flux modulation machines. The working principle of proposed machine is studied, and basic electromagnetic characteristics are calculated by finite element method, including no-load magnetic flux linkage, no-load back electromotive force, cogging torque, and output torque. In addition, the processes of flux-enhancing and flux-weakening are analyzed. Finally, one prototype with one kilowatt was built, and its static characteristics were tested. The results show that the proposed VFPMVM has the merits of high torque density, small cogging torque, and wide speed range, which is a promising candidate for electric vehicle direct drive field.

1. Chan, C. C., K. T. Chau, and J. Z. Jiang, "Novel permanent magnet motor drives for electric vehicles," IEEE Trans. Ind. Electr., Vol. 43, No. 2, 331-339, 1996.
doi:10.1109/41.491357

2. Chan, C. C., "The state of the art of electric, hybrid, and fuel cell vehicles," Proc. of the IEEE, Vol. 95, No. 4, 704-718, 2007.
doi:10.1109/JPROC.2007.892489

3. Zhu, Z. Q. and D. Evans, "Overview of recent advances in innovative electrical machines with reference to magnetically geared switched flux machines," Proceedings of International Conference on Electrical Machines and Systems, 1-10, 2014.

4. Amara, Y., J. Lucidarme, M. Gabsi, M. Lécrivain, A. Hamid, B. Ahmed, and A. D. Akémakou, "A new topology of hybrid synchronous machine," IEEE Trans. Ind. Appl., Vol. 37, No. 5, 1273-1278, 2001.
doi:10.1109/28.952502

5. 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 Trans. Magn., Vol. 45, No. 10, 4578-4581, 2001.
doi:10.1109/TMAG.2009.2023071

6. Toba, A. and T. A. Lipo, "Generic torque-maximizing design methodology of the surface permanent magnet vernier machine," IEEE Trans. Ind. Appl., Vol. 36, No. 6, 1539-1546, 2000.
doi:10.1109/28.887204

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

8. Jian, L. N. and K. T. Chau, "Analytical calculation of magnetic field distribution in coaxial magnetic gears," Progress In Electromagnetics Research, Vol. 92, 1-16, 2009.
doi:10.2528/PIER09032301

9. Jian, L. N. and K. T. Chau, "Design and analysis of a magnetic-geared electronic-continuously variable transmission system using finite element method," Progress In Electromagnetics Research, Vol. 107, 47-61, 2010.
doi:10.2528/PIER10062806

10. Jian, L. N., G. Xu, Y. Gong, J. Song, J. Liang, and M. Chang, "Electromagnetic design and analysis of a novel magnetic-gear-integrated wind power generator using time-stepping finite element method," Progress In Electromagnetics Research, Vol. 113, 351-367, 2011.
doi:10.2528/PIER10121603

11. Jian, L. N., G. Xu, J. Song, H. Xue, and D. Zhao, "Optimum design for improving modulating-effect of coaxial magnetic gear using response surface methodology and genetic algorithm," Progress In Electromagnetics Research, Vol. 116, 297-312, 2011.
doi:10.2528/PIER11032316

12. Xu, G., L. N. Jian, W. Gong, and W. Zhao, "Quantitative comparison of flux-modulated interior permanent magnet machines with distributed windings and concentrated windings," Progress In Electromagnetics Research, Vol. 129, 109-123, 2012.
doi:10.2528/PIER12040901

13. Li, J. G., K. T. Chau, J. Z. Jiang, C. H. Liu, and W. Li, "A new efficient permanent-magnet vernier machine for wind power generation," IEEE Trans. Magn., Vol. 46, No. 6, 1475-1478, 2010.
doi:10.1109/TMAG.2010.2044636

14. Jian, L. N., J. N. Liang, Y. J. Shi, and G. Xu, "A novel double-winding permanent magnet flux modulated machine for stand-alone wind power generation," Progress In Electromagnetics Research, Vol. 142, 275-289, 2013.
doi:10.2528/PIER13072304

15. Kong, W. Q., Y. Zhang, M. M. Huang, and Q. Z. Huang, "Flux concentrating multi-tooth splitting poles permanent magnet vernier machine cogging torque optimization and experimental verification," INT J. Appl. Electrom, Vol. 56, No. 4, 1-12, 2018.

16. Xu, L., W. X. Zhao, G. H. Liu, and C. Song, "Design optimization of a spoke-type permanent-magnet vernier machine for torque density and power factor improvement," IEEE Trans. Veh. Technol., Vol. 68, No. 4, 3446-3456, 2019.
doi:10.1109/TVT.2019.2902729

17. Zhang, Y., D. Li, P. Yan, X. Ren, and J. Ma, "A high torque density claw pole permanent-magnets vernier machine," IEEE Trans. Ind. Electron., Vol. 10, No. 2, 1756-1765, 2022.

18. Guan, Q., Y. T. Fang, and P. D. Pfister, "A novel concentrated-winding vernier pseudo-direct-drive permanent-magnet machine," IEEE Trans. Magn., Vol. 58, No. 2, 8103805, 2022.

19. Wu, L. L. and R. H. Qu, "A novel dual-stator vernier permanent magnet machine with improved power factor," IEEE Trans. Ind. Appl., Vol. 58, No. 3, 3486-3496, 2022.
doi:10.1109/TIA.2022.3155540

20. Li, X. L., K. T. Chau, and M. Cheng, "Analysis, design and experimental verification of a field-modulated permanent-magnet machine for direct-drive wind turbines," IET Electr. Power Appl., Vol. 9, No. 2, 150-159, 2015.
doi:10.1049/iet-epa.2014.0156

21. Yang, H., H. Y. Lin, Z. Q. Zhu, S. H. Fang, and Y. K. Huang, "Novel flux-regulatable dual-magnet vernier memory machines for electric vehicle propulsion," IEEE Trans. Appl. Supercond., Vol. 24, No. 5, 0601205, 2014.
doi:10.1109/TASC.2014.2351259

22. Zhang, Y., H. Y. Lin, S. H. Fang, and Y. K. Huang, "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., Vol. 50, 617-626, 2016.

23. Liu, C. H., J. Zhong, and K. T. Chau, "A novel flux-controllable vernier permanent-magnet machine," IEEE Trans. Magn., Vol. 47, No. 10, 4238-4241, 2011.
doi:10.1109/TMAG.2011.2152374

24. Amara, Y., L. Vido, M. Gabsi, E. Hoang, and B. Hamid, "Hybrid excitation synchronous machines: Energy-efficient solution for vehicles propulsion," IEEE Trans. Veh. Technol., Vol. 58, No. 5, 2137-2149, 2009.
doi:10.1109/TVT.2008.2009306

25. Zhang, Y., Q. Z. Huang, and M. M. Huang, "Design and experimental verification of adaptive speed region control for hybrid excitation claw-pole synchronous machine," Progress In Electromagnetics Research C, Vol. 88, 195-205, 2018.
doi:10.2528/PIERC18092603

Dr. Yang Zhang

Professor Jiming Luo

Dr. Mingming Huang

Dr. Quanzhen Huang

Dr. Duane Decker