TNC-generalized predictive speed control of induction motor drives

This paper presents and validates an efficient speed control scheme based on the GPC (Generalized Predictive Control) algorithm for the indirect vector control of the induction motor. The GPC controller is employed in the speed loop, while the current loops incorporate the SVPWM (Space Vector Pulse Width Modulation) with the PI (Proportional Integral) controllers. This GPC speed control scheme for induction motor is based in the TNC (Truncated Newton bound Constrained) minimization method and provides a medium-low computation cost, a fast response and good rejection of uncertainties and measurement noises. The presented speed control algorithm has been tested using various simulation and experimental tests, taking into account the parameter uncertainties and measurement noise in the two loop signals, the rotor speed and the stator current, with and without unknown external load disturbance. This work shows that this robust speed GPC algorithm provides an electromagnetic torque without undesirable chattering phenomenon.