Input filter design for sliding mode controlled matrix converters

This paper presents the input filter design for sliding mode controlled matrix converters. A global sliding mode control approach is considered for the converter with input filter to guarantee near unity input power factor operation and voltage or output current control. The sliding surfaces are directly obtained from the global system equations (matrix converter and input filter) written in the phase canonical form. The association of these sliding surfaces with the state-space vectors technique allows the choice of the most appropriate switching strategy. The proposed new input filter design considers the maximum allowed displacement factor introduced by the filter, as well as the ripple present at the capacitor voltages. Simulation results are obtained and discussed