Modular Multilevel Converter based induction machine drive

This paper proposes that a medium voltage level power Modular Multilevel Converter (MMC) based induction machine drive. MMC replaces a two-level voltage source converter (VSC) to drive an induction motor because of its high voltage power range. A designed 5-level three-phase dc-to-ac MMC is analyzed on the circular topology. The indirect field orientated vector control (FOC) is used to control the motor. This paper also compares the vector control loops with a constant and a dynamic rotor flux as feedforward. The motor drive system is simulated in MATLAB/SimPowerSystems. The simulation results validate the control design of the motor drive with two different vector control loops.