Title :
Direct vector control of induction motors based on independent estimation of resistance and flux
Author :
Liu, Kang-Zhi ; Yokoo, Masashi ; Kondo, Keiichiro
Author_Institution :
Department of Electrical and Electronics Engineering, Chiba University, Chiba, Japan
fDate :
May 31 2015-June 3 2015
Abstract :
This paper deals with the direct vector control (DVC) of induction motors. It is well known that the estimation of rotor flux plays a fundamental role in the DVC and the estimation precision is significantly affected by the motor resistance. So estimation of resistance is indispensable in practice. For fast estimation of the resistance, it is necessary to slow down the convergence rate of the current estimate. On the other hand, for fast estimation of the rotor flux, it is necessary to speed up its convergence rate. It is very difficult to realize such a trade-off in convergence rates in the full order observer. In this paper, we propose to decouple the current observer from the flux observer so as to realize independent convergence rates. Simulation results of the proposed method show a superior performance in the torque and flux responses.
Keywords :
Convergence; Induction motors; Observers; Resistance; Rotors; Torque; Current observer; Direct vector control; Induction motor; Parameter adaptation; Rotor flux observer;
Conference_Titel :
Control Conference (ASCC), 2015 10th Asian
Conference_Location :
Kota Kinabalu, Malaysia
DOI :
10.1109/ASCC.2015.7244486