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차득근(Duck-Gun Cha),박재성(Jae-Sung Park),박건태(Gun-Tae Park) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
The vector control system of an induction motor is the high performance drive system to achieve the instantaneous torque control. The vector control system is greatly divided into the direct control, and the indirect control that the most widely is used, The indirect vector control needs the rotor time constant, which changes widely according to the temperature, frequency, and current amplitude, The incorrect time constant leads to the saturation of magnetic flux or under-excitation phenomena, As a result, that deteriorate the control performance<br/> Therefore, in this paper, the effect of time constant variation is investigated and its on- line tuning algorithm is proposed The time constant using the torque angles was calculated and that of the validity of algorithm proposed was proved through the computer simulation and the experiment