Title :
Stability improvement of speed sensorless induction motor vector control system using q-axis flux with stator resistance identification
Author :
Tsuji, Mineo ; Chen, Shuo ; Izumi, Katsuhiro ; Yamada, Eiji
Author_Institution :
Fac. of Eng., Nagasaki Univ., Japan
Abstract :
We have proposed a speed sensorless vector control system for induction motors using q-axis flux with parameter identification. In this paper, we go further to discuss the system stability in both motoring and regenerative operation by computing the pole-zero trajectories of the linear model, with the emphasis on the error influence of stator resistance and its identification gain. The stability improvement is significant by changing the sign of the identification gain, according to the motor operation state. The effectiveness is verified by digital simulation and experiment
Keywords :
angular velocity control; electric resistance; induction motor drives; machine control; machine theory; magnetic flux; parameter estimation; poles and zeros; stability; stators; variable speed drives; digital simulation; error influence; linear model; motoring operation; parameter identification; pole-zero trajectories; q-axis flux; regenerative operation; speed sensorless induction motor vector control; stability improvement; stator resistance; stator resistance identification; Application software; Control systems; Digital simulation; Induction motors; Machine vector control; Robustness; Sensorless control; Stability; Stators; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.703390
