Abstract: A comparative analysis of torque profiles of an AWSP-IM under various phase loss conditions with respect to the healthy six-phase condition is presented. The captured plots are accompanied by a magnified (zoom) in order to obtain a better sense of the consequences on the torque-ripple content in the resulting time-domain torque profile. The phase loss scenarios analyzed in this paper are based on the simulated result of an AWSP-IM modeled using MATLAB/SIMULINK platform. The analysis of ripple contents in the torque profiles under various phase loss conditions reflects the deterioration of the torque-profile quality in each case. Further its comparison with result of three phase counterpart shows that AWSP-IM exhibits better performance than the Three Phase Induction Motor (TPIM) under the phase loss without any external control techniques. Moreover, some of the cases gave results, which were very close to the healthy operation of TPIM.
Keywords: Comparative analysis, AWSP-IM, TPIM, Torque profiles, Phase loss conditions, magnified zoom
[1] T.M. Jahns. "Improved Reliability in Solid-State AC Drives by Means of Multiple Independent Phase-Drive Units." IEEE Transactions on Industry Applications, Vol. IA-16, pp. 321-331. May /June, 1980.
[2] E. A. Klingshirn, "High phase order induction motors - Part I –Description and theoretical consideration," IEEE Transactions on Power Apparatus and Systems, vol. PAS-102, no. 1, January 1983, pp.47 -53.
[3] G.K. Singh, "Multi-phase induction machine drive research – a survey," Electric Power Systems Research, vol. 61, no. 2, pp.139-147, 2002.
[4] H. A. Toliyat and H. Xu, "DSP-based direct torque control (DTC) for five-phase induction machines," Proc. Int. Power Electronics Conf. IPEC, Tokyo, Japan, pp.1195-1200, 2000.
[5] E. Levi, S.N. Vukosavic and M. Jones, "Vector control schemes for series-connected six-phase two-motor drive systems," IEE Proc. – Electric Power Applications, vol. 152, no. 2, pp. 226-238, 2005.
[6] R. Bojoi, F. Farina, G. Griva, F. Profumo and A. Tenconi, "Direct torque control for dual three-phase induction motor drives," IEEE Trans. on Industry Applications, vol. 41, no. 6,pp.1627-1636, 2005.
[7] Peter Vas, Sensorless Vector and Direct Torque Control, Oxford University Press, 1998.
[8] B. K. Bose, Power Electronics and AC Drives, Prentice-Hall,Englewood Cliffs, New Jersey, 1986.
[9] J.B. Wang, K. Atallah and D. Howe, "Optimal torque control of fault-tolerant permanentmagnet brushless machines," IEEE Trans. on Magnetics, vol. 39, no. 5, pp. 2962-2964, 2003.
[10] B.C. Mecrow, A. G. Jack, D.J. Atkinson, S.R. Green, G.J.Atkinson, A. King and B. Green, "Design and testing of a Four phase fault-tolerant permanent magnet machine for an engine fuel pump," IEEE Trans. on Energy Conversion, vol.19, no. 3, pp. 671-678, 2004.