A new RST cascaded predictive control scheme for induction machines

Abstract

The purpose of the paper is to present an approach to the design of an RST cascaded predictive structure to control rotor position, speed and rotor flux amplitude of an induction machine. The proposed cascaded version introduces in the structure of the inner and external loop a formulation of the reference signals, which enables tracking flux and position/speed nominal profiles, satisfying motor constraints. The corresponding cascaded generalized predictive control law with single reference control (CGPC/SRC) is coupled with the nonlinear input-output linearizing control properties. The global control law is also presented with a flux observer and the simulation results obtained in the case of nominal and mismatched parameters on the complete nonlinear model are discussed.