In coaxial magnetic gear (CMG), magnetic modul ation ring is composed of a modulator and a connecting bridge. The torque performance of the magnetic gear are affected by the different structures of the magnetic modulation ring. In this paper, fifteen different kinds of magnetic modulation rings with different structures are proposed; they consist of three different shapes of modulators and five different locations of connection bridges. By using the two-dimensional finite element method (FEM), the magnetic flux density, magnetic line distribution, static torque, and steady-state torque of the CMG with different structures of magnetic modulation ring are analyzed. The results show that the innermost bridge has the least effect on the torque and torque ripple of the CMG, while the outermost bridge has the opposite effect. The torque capacity of the circular modulator and arc modulator is higher than that of the square modulator, and the circular modulator helps to reduce the inner torque ripple, while the square modulator helps to reduce the outer torque ripple. This paper can provide some references for the design of the magnetic modulation ring.
2. Tsurumoto, K. and S. Kikuchi, "A new magnetic gear using permanent magnet," IEEE T. Magn., Vol. 23, No. 5, 3622-3624, 1987.
doi:10.1109/TMAG.1987.1065208
3. Yao, Y. D., D. R. Huang, S. M. Lin, and S. J. Wang, "Theoretical computations of the magnetic coupling between magnetic gears," IEEE T. Magn., Vol. 32, No. 3, 710-713, 1996.
doi:10.1109/20.497338
4. Filippini, M. and P. Alotto, "Coaxial magnetic gear design and optimization," IEEE T. Ind. Electron., Vol. 64, No. 12, 9934-9942, 2017.
doi:10.1109/TIE.2017.2721918
5. Tsai, M. and C. Huang, "Development of a variable-inertia device with a magnetic planetary gearbox," IEEE/ASME Transactions on Mechatronics, Vol. 16, No. 6, 1120-1128, 2011.
doi:10.1109/TMECH.2010.2077679
6. Gerber, S. and R. Wang, "Design and evaluation of a magnetically geared PM machine," IEEE T. Magn., Vol. 51, No. 8, 1-10, 2015.
doi:10.1109/TMAG.2015.2421474
7. Zhu, X., L. Chen, L. Quan, Y. Sun, W. Hua, and Z. Wang, "A new magnetic-planetary-geared permanent magnet brushless machine for hybrid electric vehicle," IEEE T. Magn., Vol. 48, No. 11, 4642-4645, 2012.
doi:10.1109/TMAG.2012.2202276
8. 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 T. Appl. Supercon., Vol. 29, No. 5, 1-5, 2019.
doi:10.1109/TASC.2019.2892152
9. Rasmussen, P. O., T. O. Andersen, F. T. Jorgensen, and O. Nielsen, "Development of a high-performance magnetic gear," IEEE T. Ind. Appl., Vol. 41, No. 3, 764-770, 2005.
doi:10.1109/TIA.2005.847319
10. Uppalapati, K. K., M. D. Calvin, J. D. Wright, J. Pitchard, W. B. Williams, and J. Z. Bird, "A magnetic gearbox with an active region torque density of 239N·m/L," IEEE T. Ind. Appl., Vol. 54, No. 2, 1331-1338, 2018.
doi:10.1109/TIA.2017.2779418
11. Dragan, R. S., R. E. Clark, E. K. Hussain, K. Atallah, and M. Odavic, "Magnetically geared pseudo direct drive for safety critical applications," IEEE T. Ind. Appl., Vol. 55, No. 2, 1239-1249, 2019.
doi:10.1109/TIA.2018.2873511
12. Iwasaki, N., M. Kitamura, and Y. Enomoto, "Optimal design of permanent magnet motor with magnetic gear and prototype verification," Electr. Eng. Jpn., Vol. 194, No. 1, 60-69, 2016.
doi:10.1002/eej.22770
13. Peng, S., W. N. Fu, and S. L. Ho, "A novel high torque-density triple-permanent-magnet-excited magnetic gear," IEEE T. Magn., Vol. 50, No. 11, 1-4, 2014.
14. Wang, R. and S. Gerber, "Magnetically geared wind generator technologies: Opportunities and challenges," Appl. Energ., Vol. 136, 817-826, 2014.
doi:10.1016/j.apenergy.2014.07.079
15. Zhu, X., L. Chen, L. Quan, Y. Sun, W. Hua, and Z. Wang, "A new magnetic-planetary-geared permanent magnet brushless machine for hybrid electric vehicle," IEEE T. Magn., Vol. 48, No. 11, 4642-4645, 2012.
doi:10.1109/TMAG.2012.2202276
16. Liu, X., Y. Zhao, Z. Chen, D. Luo, and S. Huang, "Multi-objective robust optimization for a dual-flux-modulator coaxial magnetic gear," IEEE T. Magn., Vol. 55, No. 7, 1-8, 2019.
17. Wang, Y., M. Filippini, N. Bianchi, and P. Alotto, "A review on magnetic gears: Topologies, computational models, and design aspects," IEEE T. Ind. Appl., Vol. 55, No. 5, 4557-4566, 2019.
doi:10.1109/TIA.2019.2916765
18. Li, X., M. Cheng, and Y. Wang, "Analysis, design and experimental verification of a coaxial magnetic gear using stationary permanent-magnet ring," IET Electr. Power App., Vol. 12, No. 2, 231-238, 2018.
doi:10.1049/iet-epa.2017.0382
19. Kim, S. J., E. Park, S. Jung, and Y. Kim, "Transfer torque performance comparison in coaxial magnetic gears with different flux-modulator shapes," IEEE T. Magn., Vol. 53, No. 6, 1-4, 2017.
20. Abdelhamid, D. Z. and A. M. Knight, "The effect of modulating ring design on magnetic gear torque," IEEE T. Magn., Vol. 53, No. 11, 1-4, 2017.
doi:10.1109/TMAG.2017.2716920
21. Zhang, X., X. Liu, and Z. Chen, "A novel dual-flux-modulator coaxial magnetic gear for high torque capability," IEEE T. Energy Conver., Vol. 33, No. 2, 682-691, 2018.
doi:10.1109/TEC.2017.2778285
22. Jian, L., Z. Deng, Y. Shi, J. Wei, and C. C. Chan, "The mechanism how coaxial magnetic gear transmits magnetic torques between its two rotors: Detailed analysis of torque distribution on modulating ring," IEEE/ASME Transactions on Mechatronics, Vol. 24, No. 2, 763-773, 2019.
doi:10.1109/TMECH.2019.2893183
23. Amrhein, M. and P. T. Krein, "Force calculation in 3-D magnetic equivalent circuit networks with a Maxwell stress tensor," IEEE T. Energy Conver., Vol. 24, No. 3, 587-593, 2009.
doi:10.1109/TEC.2009.2016142
Submit
