| Abstract |
The modelling of a three-phase ac-ac matrix converter with an input 'LC' filter is presented and sliding mode controllers are designed in order to guarantee sinusoidal input and output waveforms at near unity input power factor. First, the matrix converter model, considering the high frequency input filter is obtained in 'aB' coordinates, using the Concordia transformation. The sliding mode controllers are designed based on this model, together with the state-space vectors modulation technique, which allows a more efficient choice of the switching strategy. The sliding mode guarantees a robust on-line control of the matrix converter output voltages and input currents, with near unity input power factor. In order to confirm the expected performance, simulation results are obtained and discussed. |
