Development of modulation strategies for three-phase to two-phase matrix converters

In this paper, the modulation strategy is developed for three-phase to two-phase matrix converters for synthesising balanced and unbalanced output voltages from balanced and unbalanced input voltages. Reduction of low order input current harmonics with sinusoidal output voltages is achieved by using the proposed switching strategies. The other advantage of the proposed method is the significant reduction of the output total harmonic distortion (THD). There are no low frequency harmonics in the output voltage, too. Therefore, a small filter (if the switching frequency is high enough) can be used at the input and output sides. The converter with the proposed switching strategies has been modelled and simulated by PSCAD software. The simulation results have good agreement with measurement results.

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