Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon free Analytical modelling of radial suspension force in bearingless surface-mounted PM synchronous motors considering static rotor eccentricity

© The Institution of Engineering and Technology
Received 09/09/2018, Accepted 01/07/2019, Revised 24/04/2019, Published 01/07/2019

In this study, a new analytical model is provided in order to calculate the radial suspension force in bearingless surface-mounted permanent magnet synchronous motor with static rotor eccentricity. The proposed model is based on the harmonic analysis of magnetic flux density, and considers the influence of both radial and tangential air-gap field components on the computation of radial suspension force. This model can reveal the generation mechanism of the radial suspension force and identify the generation sources of the force ripples. Furthermore, the magnitudes and frequencies of radial suspension force harmonics, and the relationship between the radial suspension force and rotor eccentric displacements can be accurately predicted by the proposed model. However, this model cannot be used for saturated machines. The analytical model is verified by finite-element analyses and the result of static experimental study.

Inspec keywords: finite element analysis; synchronous motors; machine windings; magnetic flux; machine control; permanent magnet motors; permanent magnet machines; harmonic analysis; rotors; air gaps

Other keywords: radial suspension force harmonics; bearingless surface-mounted PM synchronous motors; analytical modelling; static rotor eccentricity; radial air-gap field components; tangential air-gap field components; bearingless surface-mounted permanent magnet synchronous motor; analytical model

Subjects: Synchronous machines; Finite element analysis; Control of electric power systems

References

    1. 1)
      • 11. Zhu, H., Hung, J.: ‘Compensation control of suspension force for LS-BLPMSM’, IET Electr. Power Appl., 2017, 11, (4), pp. 622–630.
    2. 2)
      • 14. Sun, X., Su, B., Chen, L., et al: ‘Nonlinear flux linkage modeling of a bearingless permanent magnet synchronous motor based on AW-LSSVM regression algorithm’, Int. J. Appl. Electromag. Mechan., 2016, 51, (2), pp. 151–159.
    3. 3)
      • 25. Gieras, J.F., Wang, C., Lai, J.C.: ‘Noise of polyphase electric motors’ (CRC Press, Boca Raton, FL, USA, 2006, 1st edn.).
    4. 4)
      • 21. LapÃt'tre, B., Takorabet, N., Meibody-Tabar, F., et al: ‘Spectral modeling of force ripples in permanent magnet bearingless motors’, Int. J. Comput. Mathemat. Electri. Electro. Eng., 2016, 35, (5), pp. 1–9.
    5. 5)
      • 18. Lapôtre, B., Takorabet, N., Meibody-Tabar, F., et al: ‘New model of radial force determination in bearingless motor’, IEEE Trans. Magn., 2015, 51, (3), pp. 1–4.
    6. 6)
      • 9. Li, W., Chau, K.T., Ching, T.W., et al: ‘Design of a high speed super conducting bearingless machine for flywheel energy storage systems’, IEEE Trans. Appl. Supercond., 2015, 25, (3), pp. 1–10.
    7. 7)
      • 6. Zhang, S., Luo, F.L.: ‘Direct control of radial displacement for bearingless permanent magnet type synchronous motors’, IEEE Trans. Ind. Electron., 2009, 56, (2), pp. 542–552.
    8. 8)
      • 20. Wu, L.J., Zhu, Z.Q., Chen, J.T., et al: ‘An analytical model of unbalanced magnetic force in fractional-slot surface-mounted permanent magnet machines’, IEEE Trans. Magn., 2010, 46, (7), pp. 2686–2700.
    9. 9)
      • 19. Sun, X., Chen, L., Yang, Z.: ‘Overview of bearingless permanent magnet synchronous motors’, IEEE Trans. Ind. Electron., 2013, 60, (12), pp. 5528–5538.
    10. 10)
      • 16. Serri, S., Tani, A., Serra, G.: ‘Analytical model of radial forces considering mutual effects between torque and levitation current space vectors in 5-phase PM bearingless motors’. Proc. Ann. Conf. Ind. Electron. Society, Vienna, Austria, November 2013, pp. 5142–5147.
    11. 11)
      • 26. Zhu, Z.Q., Howe, D., Chen, C.C.: ‘Improved analytical model for predicting the magnetic field distribution in brushless permanent-magnet machines’, IEEE Trans. Magn., 2002, 38, (1), pp. 229–238.
    12. 12)
      • 3. Amrhein, W., Silber, S., Nenninger, K.: ‘Levitation forces in bearingless permanent magnet motors’, IEEE Trans. Magn., 1999, 35, (5), pp. 4052–4054.
    13. 13)
      • 23. Rezaee Alam, F., Abbaszadeh, K.: ‘Magnetic field analysis in eccentric surface-mounted permanent-magnet motors using an improved conformal mapping method’, IEEE Trans. Energy Convers., 2015, 31, (1), pp. 1–12.
    14. 14)
      • 2. Ooshima, M., Chiba, A., Fukao, T., et al: ‘Design and analysis of permanent magnet-type bearingless motors’, IEEE Trans. Ind. Electron., 1996, 43, (4), pp. 292–299.
    15. 15)
      • 4. Chiba, A., Fukao, T., Ichikawa, O., et al: ‘Magnetic bearings and bearingless drives’ (Newnes Press, Oxford, UK2005, 1st edn.).
    16. 16)
      • 8. Xing, J., Wang, F.: ‘Analysis and magnetic levitation force of high speed PM bearingless machine’. Proc. Int. Conf. Electr. Machines and Systems, Seoul, Republic of Korea, October 2007, pp. 1651–1654.
    17. 17)
      • 7. Huang, J., Li, B., Jiang, H., et al: ‘Analysis and control of multiphase permanent magnet bearingless motor with a single set of half coiled winding’, IEEE Trans. Ind. Electron., 2014, 61, (7), pp. 3137–3145.
    18. 18)
      • 10. Ooshima, M., Chiba, A., Rahman, M. A., et al: ‘An improved control method of buried-type IPM bearingless motors considering magnetic saturation and magnetic pull variation’, IEEE Trans. Energy Convers., 2004, 19, (3), pp. 569–575.
    19. 19)
      • 5. Inagaki, K., Chiba, A., Rahman, M.A., et al: ‘Performance characteristics of inset-type permanent magnet bearingless motor drives’. Proc. IEEE Power Engin. Society Winter Meeting, Singapore, January 2000, pp. 202–207.
    20. 20)
      • 27. Rahideh, A., Korakianitis, T.: ‘Analytical magnetic field distribution of slotless brushless permanent magnet motors-part 1. Armature reaction field, inductance and rotor eddy current calculations’, IET Electr. Power Appl., 2012, 6, (9), pp. 628–638.
    21. 21)
      • 22. Zhu, Z. Q., Wu, L. J., Mohd Jamil, M.L.: ‘Influence of pole and slot number combinations on cogging torque in permanent magnet machines with static and rotating eccentricities’, IEEE Trans. Ind. Appl., 2014, 50, (5), pp. 3265–3277.
    22. 22)
      • 12. Sun, X., Shen, Y., Zhou, Z., et al: ‘Modeling and control of a bearingless permanent magnet synchronous motor’, Int. J. Appl. Electromag. Mechan., 2017, 53, (1), pp. 151–165.
    23. 23)
      • 17. Dorrell, D.G., Ooshima, M., Chiba, A.: ‘Force analysis of a buried permanent-magnet bearingless motor’. Proc. Int. Conf. Electr. Machines and Drives, Madison, WI, USA, June 2003, pp. 1091–1097.
    24. 24)
      • 1. Ooshima, M., Miyazawa, S., Deido, T., et al: ‘Characteristics of a permanent magnet type bearingless motor’, IEEE Trans. Ind. Appl., 1996, 32, (2), pp. 363–370.
    25. 25)
      • 15. Zhu, H., Yuan, J., Jintao, J.V.: ‘A novel single winding structure and closed loop control of the suspension force of bearingless permanent magnet synchronous motors’, J. Energies, 2016, 9, (5), pp. 1–10.
    26. 26)
      • 13. Sun, X., Xue, Z., Zhu, J., et al: ‘Suspension force modeling for a bearingless permanent magnet synchronous motor using Maxwell stress tensor method’, IEEE Trans. Appl. Supercond., 2016, 26, (7), pp. 1–10.
    27. 27)
      • 28. Rahideh, A., Korakianitis, T.: ‘Analytical magnetic field distribution of slotless brushless PM motors-part 2. Open circuit field and torque calculations’, IET Electr. Power Appl., 2012, 6, (9), pp. 639–651.
    28. 28)
      • 24. Hassanzadeh, M., Faiz, J., Kiyoumarsi, A.: ‘Analytical technique for analysis and detection of eccentricity fault in surface-mounted permanent magnet generators using no-load voltage signature’, Electr. Pow. Compon. Syst., 2018, 46, (8), pp. 1–17.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-epa.2018.5607
Loading

Related content

content/journals/10.1049/iet-epa.2018.5607
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Print this page
This is a required field
Please enter a valid email address