Field Oriented Control of a Modular Multilevel Matrix Converter based Variable Speed Drive

The Modular Multilevel Matrix Converter (M
³
C) has been proposed as an appropriate alternative to driving high-power machines due to characteristics such as modularity, medium-voltage operation, high power quality, reliability. Nevertheless, the control of M
³
C is complicated, especially in variable-speed applications, because large voltage oscillations can be produced in the floating capacitors. Therefore, this paper presents a vector control system that allows decoupled regulation of the floating capacitors of the M
³
C, whereas Field Oriented Control (FOC) is applied to regulate an induction machine. The effectiveness of the proposed control system is validated through M
³
C simulation model composed of 63 power cells M
³
C driving a 1250 HP induction machine.