Three-phase voltage-fed Z-source matrix converter

This paper proposes a novel three-phase ac-ac converter topology based on Z-source concept. It could provide buck-boost function and make the role of frequency changer. Compared with the traditional ac-dc-ac converter, it uses fewer devices and realizes direct ac-ac power conversion, so as to have higher efficiency and better circuit characteristics. Compared with the traditional matrix converter, it provides wider voltage regulation range and improves input-output voltage transformation ratio. It is better to be applied in electrical transmission. The circuit topology, operating principle, control method and simulation results are given in this paper, and the rationality and feasibility is verified.

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