Abstract
AbstractThis paper proposes an extended method of zero‐voltage switching (ZVS) range for a dual active bridge (DAB) matrix converter with a discontinuous current mode (DCM). In the traditional DAB converter, ZVS cannot be achieved at a light load condition. The duty ratio calculation to achieve power factor correction and ZVS is explained using a circulating current. From the experimental results using a 5‐kW prototype, the ZVS operation with zero transmission power is achieved by increasing the circulating current. In addition, the grid current distortion is lower than 5.0% at the rated power regardless of the DC voltage variation of plus or minus 20%.
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