Predictive control with active damping in a Direct Matrix Converter

This paper presents a control scheme applied to the Direct Matrix Converter (DMC), which combines the advantages of the predictive control and active damping to reduce the resonance of the input filter. A discrete-time model of the converter and the load is used to predict the behavior of the input reactive power in the supply side and the output currents for each valid commutation state. The approach selects the best switching state according to an optimizing algorithm based in a cost function in order to generate unity input power factor and output currents with a low error respect to a reference. In addition, the predictive controller is enhanced by including active damping in order to mitigate the potential resonances in the input filter. Simulation results confirm the good performance of the strategy, allowing for controlling the converter in a simple and intuitive manner.