DTC scheme for an induction motor using generalized minimum variance controller with dynamic pole assignment

The purpose of this paper is to show the potential use of the generalized minimum variance controller (GMVC) in the direct torque control (DTC) scheme, using a Luenberger observer (LO) as speed estimator. GMVC is a sub-optimal controller incorporating a performance index to tailor the closed loop behavior; in particular, a pole assignment strategy is attractive, but in general, it implies some previous knowledge of the system. A modification to the original GMVC is presented which has a novel approach to consider pole assignment of the closed loop system. The paper proposes a complete close loop speed control scheme. The performance of the scheme is validated by simulation results.