New robust model reference adaptive control for induction motor drives using a hybrid controller

One of the most recent and most intense efforts in control theory deals with handling systems whose behavior of interest is determined by interacting continuous and discrete dynamics. This approach can be applied not only to intrinsic hybrid processes but also to other systems as for example continuous processes with supervisory logic, multi-model control systems, switching control, etc. In this paper we describe a framework for hybrid adaptive control of induction motor which involves logic-based switching among a family of candidate controllers. The importance of the hybrid controller is demonstrated by experimental results. It is shown that the presented hybrid controller for IM drive has fast tracking capability, less steady state error and is robust to load disturbance. The complete speed control scheme of the IM drive incorporating the hybrid control is experimentally implemented and validated for a prototype 1.5 kW IM.