In this study, the authors presented a systematic design procedure of outer rotor bearingless synchronous reluctance motor (SynRM). The proposed motor is compared with an already prototyped inner rotor bearingless SynRM at different operation points. It has been shown that a properly designed outer rotor SynRM can produce higher levitation forces than the inner rotor counterpart. The inner rotor motor produces higher torque and eccentric forces than the outer rotor motor.

References

1. 1)
  - 4. Petrov, I.: ‘Cost reduction of permanent magnet synchronous machines’. Ph.D. dissertation, Lappeenranta Univ. of Technology, Lappeenranta, Finland, 1987.
2. 2)
  - 7. Ferrari, M., Bianchi, N., Doria, A., et al: ‘Design of synchronous reluctance motor for hybrid electric vehicles’, IEEE Trans. Ind. Appl., 2015, 51, (4), pp. 3030–3040.
3. 3)
  - 14. Vagati, A., Pastorelli, M., Francheschini, G., et al: ‘Design of low-torque-ripple synchronous reluctance motors’, IEEE Trans. Ind. Appl., 1998, 34, (4), pp. 758–765.
4. 4)
  - 15. Belahcen, A., Mukherjee, V., Far, M.F., et al: ‘Coupled field and space-vector equations of bearingless synchronous reluctance machine’. 2016 XXII Int. Conf. on Electrical Machines (ICEM), Lausanne, 2016, pp. 2581–2587.
5. 5)
  - 2. Schneider, T., Binder, A.: ‘Design and evaluation of a 60,000 rpm permanent magnet bearingless high speed motor’. 2007 7th Int. Conf. on Power Electronics and Drive Systems, Bangkok, 2007, pp. 1–8.
6. 6)
  - 11. Yammine, S., Henaux, C., Fadel, M., et al: ‘Synchronous reluctance machine flux barrier design based on the flux line patterns in a solid rotor’. 2014 Int. Conf. on Electrical Machines (ICEM), Berlin, 2014, pp. 297–302.
7. 7)
  - 1. Takemoto, M., Yoshida, K., Itasaka, N., et al: ‘Synchronous reluctance type bearingless motors with multi-flux barriers’. 2007 Power Conversion Conf. – Nagoya, Nagoya, 2007, pp. 1559–1564.
8. 8)
  - 16. Tenhunen, A., Holopainen, T.P., Arkkio, A.: ‘Effects of saturation on the forces in induction motors with whirling cage rotor’, IEEE Trans. Magn., 2004, 40, (2), pp. 766–769.
9. 9)
  - 10. Arkkio, A.: ‘Analysis of induction motors based on the numerical solution of the magnetic field and circuit equations’. Ph.D. dissertation, Helsinki Univ. of Technology, Espoo, Finland, 1987.
10. 10)
  - 9. Yamada, T., Nakano, Y., Asama, J., et al: ‘Outer rotor consequent-pole bearingless motor with improved start-up characteristics’, IEEE Trans. Magn., 2008, 44, (11), pp. 4273–4276.
11. 11)
  - 5. Staton, D.A., Miller, T.J. E., Wood, S.E.: ‘Maximising the saliency ratio of the synchronous reluctance motor’, IEEE Proc. B – Electric Power Applications, 1993, 140, (4), pp. 249–259.
12. 12)
  - 6. Howard, E., Kamper, M.J.: ‘Weighted factor multiobjective design optimization of a reluctance synchronous machine’, IEEE Trans. Ind. Appl., 2016, 52, (3), pp. 2269–2279.
13. 13)
  - 8. Deshpande, Y., Toliyat, H.A.: ‘Design of an outer rotor ferrite assisted synchronous reluctance machine (Fa- SynRM) for electric two wheeler application’. 2014 IEEE Energy Conversion Congress and Exposition (ECCE), Pittsburgh, PA, 2014, pp. 3147–3154.
14. 14)
  - 3. Reichert, T., Nussbaumer, T., Kolar, J.W.: ‘Bearingless 300 W pmsm for bioreactor mixing’, IEEE Trans. Ind. Electron., 2012, 59, (3), pp. 1376–1388.
15. 15)
  - 13. Pellegrino, G., Guglielmi, P., Vagati, A., et al: ‘Core losses and torque ripple in IPM machines: dedicated modeling and design tradeoff’, IEEE Trans. Ind. Appl., 2010, 46, (6), pp. 2381–2391.
16. 16)
  - 12. Matsuo, T., Lipo, T.A.: ‘Rotor design optimization of synchronous reluctance machine’, IEEE Trans. Energy Convers., 1994, 9, (2), pp. 359–365.

Comparative study of inner and outer rotor bearingless synchronous reluctance motors

References

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