Generalized Predictive Speed Control of Two- Motor Drive Machines Series-Connected Fed by Five-Phase

Abstract

This work examines a newly introduced five-phase drive system with two motors and stator windings connected in series. Using a widely recognized phase transposition in the series chain, it is shown how a single five-phase SVPWM inverter can power a two series-connected five-phase machine drive with decoupled torque and flux control. The exceeded generated current is among the many important problems: quick, with significant change in step of the speed control of a single inverter-supplied both 5-phase synchronous drive machines connected in series. Consequently, if the speed controller lacks output amplitude limitation, it may cause damage to the motor itself as well as the power electronics converter. This study's goal is to solve saturating speed controller issue. First, a speed control loops and both internal current loops are the two applications for controllers that are predictive in polynomial form. In order to make sure that the reference speed response stays within an enforced template under temporary conditions with a low current command, the outer predictive controller for speed is then enhanced by optimizing the Youla parameter convexly while taking frequency and temporal constraints into account. On the other hand, the new controller maintains the closed loop's properties that the original predicting controller. The results of the simulation confirm the validity and effectiveness of the control strategy proposed Generalized Predictive Control GPC_RST of the multi-machines system in both terms of performance and robustness (the stator resistance Rs1,2 and the inertia variation J1,2 have been doubled, and the inductances L d1,2 and L q1,2 have been lowered by 20% of their nominal values) compared to the conventional Proportional Integral PI controllers.