Nonlinear controllers for induction motors

Tremendous breakthroughs in the techniques of nonlinear control have been achieved in the last twenty years or so. These methods include the differential-geometric techniques, differential-algebraic methods, variable structure control, back-stepping, etc This paper specifically considers some of the differential-geometric techniques in terms of their suitability for high-performance induction motor control. It is shown that both dynamic feedback linearization and input-output linearization are applicable to induction motor control and a comparison of the two is made. The particular effectiveness of the input-output linearization controller is demonstrated with experimental results.