DTC on multilevel inverters for pumping and ventilation applications

In this paper, DTC with multilevel inverters is presented. Due to simplicity of control and intrinsic short circuit protection, DTC is used to control high power pumps and fans. All of the required blocks including multilevel inverter, the 24-sector flux sector seeker and switching table are proposed. Balancing method for flying capacitor and a simple model of pump are given. Simulation results in SIMULINK confirm the validity and performance of the proposed model.