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Three-Level Single-Phase Bridgeless PFC Rectifiers
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DOI：10.1109/TPEL.2014.2322314.png)
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Abstract
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This paper presents new three-level unidirectional single-phase PFC rectifier topologies well suited for applications targeting high efficiency and/or high power density. The characteristics of a selected novel rectifier topology including its principles of operation, modulation strategy, feedback control scheme, and a power circuit design related analysis are presented. Finally, a 220-V/3-kW laboratory prototype is constructed and used in order to verify the characteristics of the new converter, which include remarkably low switching losses and single ac-side boost inductor, that allow for a 98.6% peak efficiency with a switching frequency of 140 kHz.
Keywords:
AC-DC converter
high efficiency rectifier
multilevel converter
power factor correction
PWM modulation
PWM rectifier
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