Direct torque control of two induction motors fed by a Z-source five-leg power inverter

摘要

This paper deals with an adaptive direct torque control (DTC) of two induction motors fed by a Z-source five-leg inverter. Indeed, one power common leg is shared between two phases of the two induction motors to reduce the power switches number. Furthermore, an impedance network (inductances and capacitors) is inserted between the DC source and the five-legs power inverter to boost the input voltage and therefore eliminate a DC-DC converter floor. In hence, during each sampling time, shoot-through states are applied alternatively with the DTC techniques to ensure at the same time boost voltage regulation and an independent control of both induction motors. In this context, validation results have been presented to prove the effectiveness of the developed system.