volume | PIER Journals

Abstract

Active Magnetic Bearings (AMBs) are advantageous due to their active control on rotor position, but are disadvantageous due to their high initial as well running costs. The running cost of AMB can be reduced by improving design of electromagnet so that the same magnetic field can be generated with reduced supply of electric current. In the present paper, analyses of various arrangements of electromagnets using 2D finite element (FE) have been presented. To validate the results of magnetic flux density obtained from theoretical study, experiments were performed, and comparisons have been presented. The electromagnet using Halbach winding arrangement provides the best results.

1. Betschon, F., "Design principles of integrated magnetic bearings,", PhD Thesis, 31–32, Swiss Federal Institute of Technology, 2000.
doi:10.1109/TMAG.2012.2196443 Google Scholar

2. Fang, J., Y. Le, J. Sun, and K. Wang, "Analysis and design of passive magnetic bearing and damping system for high-speed compressor," IEEE Transactions on Magnetics, Vol. 48, No. 9, 2528-2537, 2012.
doi:10.1109/TMECH.2005.859830 Google Scholar

3. Noh, M. D., S. R. Cho, J. H. Kyung, S. K. Ro, and J. K. Park, "Design and implementation of a fault-tolerant magnetic bearing system for turbomolecular vacuum pump," IEEE/ASME Trans. Mechatronics, Vol. 10, No. 6, 626-631, 2005.
doi:10.1115/1.4029073 Google Scholar

4. Lijesh, K. P. and H. Hirani, "Optimization of eight pole radial active magnetic bearing," ASME, Journal of Tribology, Vol. 137, No. 2, 2015, doi: 10.1115/1.4029073.
doi:10.1109/77.920097 Google Scholar

5. Nagaya, S., N. Kashima, M. Minami, H. Kawashima, and S. Unisuga, "Study on high temperature superconducting magnetic bearing for 10 kWh flywheel energy storage system," IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1, 1649-1652, 2001.
doi:10.1002/ls.1252 Google Scholar

6. Lijesh, K. P. and H. Hirani, "Stiffness and damping coefficients for rubber mounted hybrid bearing," Lubrication Science, Vol. 26, No. 5, 301-314, 2014.
doi:10.1243/13506501JET282 Google Scholar

7. Hirani, H. and P. Samanta, "Hybrid (hydrodynamic + permanent magnetic) journal bearings," Proc. Inst. Mech. Eng., Part J, J. Eng. Tribol., Vol. 221, No. 8, 881-891, 2007. Google Scholar

8. Schweitzer, G., H. Bleuler, and A. Traxler, "Active magnetic bearing, basics, properties and applications of active magnetic bearing,", Vdf Hochschulverlag AG an der ETH, Zurich, 1994.
doi:10.1109/41.45839 Google Scholar

9. Williams, R. D., F. J. Keith, and P. E. Allaire, "Digital control of active magnetic bearings," IEEE Transactions on Industrial Electronics, Vol. 37, No. 1, 19-27, 1990.
doi:10.1109/TMECH.2007.892827 Google Scholar

10. Sahinkaya, M. N., A. H. G. Abulrub, P. S. Keogh, and C. R. Burrows, "Multiple sliding and rolling contact dynamics for a flexible rotor/magnetic bearing system," IEEE/ASME Trans. Mechatronics, Vol. 12, No. 2, 179-189, 2007.
doi:10.1109/TMECH.2005.859830 Google Scholar

11. Noh, M. D., S. R. Cho, J. H. Kyung, S. K. Ro, and J. K. Park, "Design and implementation of a fault-tolerant magnetic bearing system for turbo molecular vacuum pump," IEEE/ASME Trans. Mechatronics, Vol. 10, No. 6, 626-631, 2005. Google Scholar

12. Shankar, S., S. Sandeep, and H. Hirani, "Active magnetic bearing: A theoretical and experimental study," Ind. J. Tribol., Vol. 1, 15-25, 2006.
doi:10.1063/1.349857 Google Scholar

13. Yonnet, J. P., G. Lemarquand, S. Hemmerlin, and E. Olivier-Rulliere, "Stacked structures of passive magnetic bearings," J. Appl. Phys., Vol. 70, No. 10, 6633-6635, 1991. Google Scholar

14. Xu, F., L. Tiecai, Y. Liu, and H. Magnetization, "A study on passive magnetic bearing with Halbach magnetized array," International Conference on Electrical Machines and Systems, 2008, ICEMS 2008, 417-420, 2008.
doi:10.1109/TMAG.2012.2196443 Google Scholar

15. Fang, J., Y. Le, J. Sun, and K. Wang, "Analysis and design of passive magnetic bearing and damping system for high-speed compressor," IEEE Transactions on Magnetics, Vol. 48, No. 9, 2528-2537, 2012.
doi:10.1016/0029-554X(80)90094-4 Google Scholar

16. Halbach, K., "Design of permanent multipole magnets with oriented rare earth cobalt material," Nuclear Instruments and Methods, Vol. 169, 1-10, 1980. Google Scholar

17. Mark, A. C., "Electric motor with Halbach arrays,", US 7598646 B2, 2007.
doi:10.1109/TMAG.2011.2148110 Google Scholar

18. Gan, Z., X. Huang, H. Jiang, L. Tan, and J. Dong, "Analysis method to a Halbach PM ironless linear motor with trapezoid windings," IEEE Transactions on Magnetics, Vol. 47, No. 10, 4167-4170, 2011.
doi:10.1016/j.mechatronics.2006.03.004 Google Scholar

19. Edward, J. P., D. Stoikov, L. F. da Luz, and A. Suleman, "A performance evaluation of an automotive magnetorheological brake design with a sliding mode controller," Mechatronics, Vol. 16, No. 7, 405-416, 2006.
doi:10.1109/PAC.2001.986521 Google Scholar

20. Hartman, N. and R. A. Rimmer, "Electromagnetic, thermal, and structural analysis of RF cavities using ANSYS," Proceedings of the 2001 Particle Accelerator Conference, 2001, PAC 2001, Vol. 2, 912-914, 2001. Google Scholar

21. Pilat, A., "FEMLab software applied to active magnetic bearing analysis," International Journal of Applied Mathematics and Computer Science, Vol. 14, 497-501, 2004. Google Scholar

22. Karus, J. D. and D. A. Fleisch, Electromagnetics with Applications, McGraw-Hill International Editions, 5th edition, Singapore, 1999.

Dr. Kootta Parambil Lijesh

Dr. Harish Hirani