Predictive torque control of a multi-drive system fed by a six-leg indirect matrix converter

Abstract

This paper proposes a predictive torque and flux control for a multi-motor drive system. The scheme is based on a six-leg indirect matrix converter used to drive two induction machines operating at the same speed under different load torque conditions. By using a mathematical model of the converter and machines, the proposed control scheme selects the switching state that minimizes error in the torque and flux predictions according to their reference values. Through simulation results it is shown that the predictive approach can be easily implemented with a good tracking of the controlled variables to their respective references, verifying the fast dynamic response with a good torque tracking conditions and flux regulation in both machines.