Title :
Voltage control strategy for maximum torque operation of an induction machine in the field-weakening region
Author :
Kim, Sang-Hoon ; Sul, Seung-Ki
Author_Institution :
Dept. of Electr. Eng., Kangwon Nat. Univ., Chunchon, South Korea
fDate :
8/1/1997 12:00:00 AM
Abstract :
In this paper, a novel field-weakening scheme for the induction machine is presented. The proposed algorithm, based on the voltage control strategy, ensures the maximum torque operation over the entire field-weakening region without using the machine parameters. Also, by introducing the direct field-oriented (DFO) control, which is insensitive to the variation of machine parameters in the field-weakening region, the drive system can obtain robustness to parameter variations. Moreover, the speed sensorless control can be achieved in the very-high-speed range, where the utilization of the speed sensor is limited. Experimental results for the laboratory induction motor drive system confirm the validity of the proposed control algorithm
Keywords :
control system synthesis; induction motor drives; machine control; machine testing; machine theory; optimal control; robust control; torque control; variable speed drives; velocity control; voltage control; control algorithm; control design; control performance; direct field-oriented control; field-weakening region; induction machine; induction motor drive system; maximum torque operation; parameter variations; robustness; speed sensorless control; voltage control strategy; Control systems; Frequency; Inductance; Induction machines; Laboratories; Robust control; Sensorless control; Stators; Torque; Voltage control;
Journal_Title :
Industrial Electronics, IEEE Transactions on