Improvised predictive torque control strategy for an open end winding induction motor drive fed with four‐level inversion using normalised weighted sum model

Abstract

Open end winding induction motor (OEWIM) drives are better alternate for multi-level inverter fed induction motor drives. OEWIM drives can be used in industries and electric vehicles but they entail ripple-free torque. Predictive torque control (PTC) strategy offers high dynamic performance and lesser ripple in torque, flux when compared with direct torque control. Classical PTC involves high switching frequencies and empirical methods to select weighting factors. The selection and tuning of weighting factors are cumbersome. In this article, a new normalised weighted sum model (WSM) based PTC of four-level inverter fed OEWIM is introduced to curtail torque, flux ripples, switching frequency and enhance the selection of weighting factors. The proposed algorithm uses multi-objective cost function and the optimisation of cost function is performed by using normalised WSM. The normalisation of individual cost function simplifies the selection of weighting factors to select optimal voltage vector. As a result, the proposed PTC offers all the features of classical PTC and overcomes the difficulties involved in classical PTC. Simulation and experimental studies are performed on dual inverter fed OEWIM with four-level inversion. The effectiveness of proposed algorithm is verified by comparing proposed PTC algorithm with classical PTC algorithm.

Cost-Effective Predictive Flux Control for a Sensorless Doubly Fed Induction Generator

“…Now, by comparing the (26) and (30), the coefficients k p and k i of the PI torque controller can be calculated by…”

“…Various attempts have been made to derive an optimal value for the weighting factor through adopting an online optimization technique which updates the weighting factor according to the instantaneous change of the controlled variables respecting to their references [25], [26]. The disadvantage of this technique is that it adds extra computation burdens on the controller which cannot be realized by all microprocessors.…”

Model Predictive Control of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor

“…Applications of MPC in motor drives area is arising and still largely unexplored. A huge amount of research can found for induction motor systems that used MPC [38][39][40][41]. An important research related to PMSM with MPC is given in [21,[42][43][44][45].…”

Enhanced direct torque control and predictive torque control strategies of an open‐End winding induction motor drive to eliminate common‐mode voltage and weighting factors

“…The classical DTC and PTC strategies give higher ripples in torque and flux. Generally, lesser torque and flux ripples can be obtained by using constant switching frequency, duty ratio control, or MLI [16][17][18][19][20][21][22]. DTC with constant switching frequencies can be obtained using space vector modulation (SVM).…”