Title :
Performance of Feedforward Current Regulators for Field-Oriented Induction Machine Controllers
Author :
Lorenz, Robert D. ; Lawson, Donald B.
Author_Institution :
Department of Mechanical Engineering, University of Wisconsin¿Madison, 1513 University Avenue, Madison, WI 53706.
fDate :
7/1/1987 12:00:00 AM
Abstract :
To achieve instantaneous control of induction motor torque using field-orientation techniques, it is necessary that the phase currents be controlled to maintain precise instantaneous relationships. Failure to do so results in a noticeable degradation in torque response. Most of the currently used approaches to achieve this control employ classical control strategies which are only correct for steady-state conditions. A modern control theory approach which circumvents these limitations is developed. The approach uses a state-variable feedback control model of the field-oriented induction machine. This state-variable controller is shown to be intrinsically more robust than PI regulators. Experimental verification of the performance of this state-variable control strategy in achieving current-loop performance and torque control at high operating speeds is included.
Keywords :
Frequency; Induction machines; Local oscillators; Pi control; Regulators; Stators; Steady-state; Torque control; Voltage; Voltage-controlled oscillators;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.1987.4504956