Vector Control of Multimotor Drive

Three-phase induction machines are today a standard for industrial electrical drives. Cost, reliability, robustness and maintenance free operation are among the reasons these machines are replacing dc drive systems. The development of power electronics and signal processing systems has eliminated one of the greatest disadvantages of such ac systems, which is the issue of control. With modern techniques of field oriented vector control, the task of variable speed control of induction machines is no longer a disadvantage. The need to increase system performance, particularly when facing limits on the power ratings of power supplies and semiconductors, motivates the use of phase number other than three, In this paper a novel scheme of connecting two, three phase induction motors in parallel fed by two inverters; viz. VSI and CSI and their vector control is presented.

Authors:

• Archana S. Nanoty
• A. R. Chudasama

Keywords:

• Field oriented control
• multiphase induction motor
• power electronics converter.

References:

[1] Maria Imecs, Andrzej M. Trzynadlowski, Fellow, IEEE, Ioan I. Incze,
and Csaba Szabo "Vector control schemes for Tandem converter fed
induction motor drives" IEEE transactions on power electronics, vol. 20,
no. 2, march 2005.
[2] Bimal Bose, "Modern Power Electronics and AC Drives", Prentice Hall
[3] R. H. Nelson and P. C. Krause, "Induction machine analysis for arbitrary
displacement between multiple windings," IEEE Transactions on Power
Apparatus and Systems, vol. 93, pp. 841-848, May 1974.
[4] T. A. Lipo, "Flux sensing and control of staticac drives by use of
fluxcoils," IEEE Transactions on Magnetics, vol. MAG-13, Sept 1997.
[5] O. Ojo and I. E. Davidson, "PWM-VSI inverter-assisted stand-alone
dual stator winding induction generator," IEEE Transactions on Industry
Applications, vol. 36, pp. 1604-1611,Nov 2000.