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Abstract
Unity power factor zero-voltage-switched (ZVS) AC-to-DC power converters with an active filter are proposed. The line voltage is supplied to AC-to-DC power converters through a rectifier circuit with an input filter, to reduce high-frequency ripple components. The line current is almost synchronized to the line voltage, due to the low impedance of the input filter. Forward ZVS multiresonant power converters (ZVS-MRCs) are utilized for high-frequency operation and lossless switching. An active filter is introduced to minimize the twice line-frequency ripple component of the output voltage without large-size passive filters. Experimental results show that the proposed scheme gives good steady-state performances of the AC-to-DC power converters.
Published Version
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