Abstract
Based on the equivalency between the full-bridge indirect matrix converters (MCs) and the 3 × 1modular MCs, the carrier-based modulation strategy is first tailored for the 3 3×1-modular MC. It can be directly expanded to 3×N-modular MC, but in order to improve the power quality, the phase-shifted (PS) method and phase disposition (PD) method are proposed. The former is suitable for the 3×N-modular MC with any multiwinding transformers (including phase-shifting transformers). Moreover, the latter is only applicable to the 3×N-modular MC with ordinary multiwinding transformers. The PD method has advantages over the PS method in the output current quality and efficiency. However, the PS method is superior to the PD method in the input current quality. Experimental results verify the correctness and effectiveness of the proposed modulation schemes.
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