REFERENCE MODEL SELECTION AND ADAPTIVE-CONTROL FOR INDUCTION-MOTOR DRIVES

An adaptive model following speed controller for induction motor drive s is proposed and successfully implemented. This adaptive controller i s easy to be implemented, since for the controlled plant, only the out put signal is needed to feedback. In order to choose a proper referenc e model, which possesses the desired drive dynamic behavior, a two-deg ree-of-freedom (2-DOF) controller is designed based on a systematic pr ocedure according to the prescribed drive specifications. The referenc e model of the adaptive system is chosen as the transfer function of t he controlled drive system by the 2-DOF controller in the nominal case . An adaptation signal is augmented to let the prescribed specificatio ns be maintained under wide operating conditions.