Robust TDOF Controller of Induction Motor Without Speed Sensors for Variations of Rotor Resistance

초록

This paper consists of the speed sensorless vector control of induction motor using two degrees of freedom(TDOF)Theory. A TDOF control design which robustly stabilizes the plant, guarantees the robust H∞ performance in terms of feedback controller and has a good tracking performance in feedforward controller is presented. In this paper, induction motor drive system to get robustness for the variations of rotor resistance and to improve the tracking performance is constructed. An adaptive flux observer is used for the purpose of estimating rotor flux and speed in the speed sensorless scheme. Experimaental results are carried out to verify the validity of the proposed algorithm.