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A new inverter control scheme for induction motor drives requiring wide speed range

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2 Author(s)
Osama, M. ; Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA ; Lipo, T.A.

A new control scheme to extend the speed range of a four-pole induction machine is investigated. A three-phase stator winding is used with each of two coil groups per phase being independent resulting in a six-coupled circuit, six-terminal stator winding. Two inverters supply the machine with the required regulated currents to obtain the effect of either four-pole or two-pole windings. Four-pole operation is proposed from zero speed until the end of its constant power region. Employing contactorless pole changing to obtain two-pole operation extends the constant power region resulting in a doubling of the speed range for approximately the same inverter/machine rating. The application is to electric vehicles

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Industry Applications, IEEE Transactions on  (Volume:32 ,  Issue: 4 )