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A zero-voltage switching (ZVS) flyback-boost (FB) converter with a voltage-doubler rectifier (VDR) has been proposed. By combining the common part between a flyback converter and a boost converter as a parallel-input/series-output (PISO) configuration, this proposed circuit can increase a step-up ratio and clamp the surge voltage of switches. The secondary VDR provides a further extended step-up ratio...
A full-bridge PWM DC/DC converter with controlled output rectifier is presented in this paper. Soft switching for all power switches is achieved by using controlled output rectifier with new lossless energy recovery turn-off snubber on the secondary side of the converter. No circulating current is occurred in the proposed converter with used new control method. The principle of operation is explained...
This paper proposes a new bridgeless single-stage half-bridge ac-dc converter. The proposed converter integrates the operation of the bridgeless power factor correction (PFC) boost rectifier and the asymmetrical pulse-width modulation (APWM) half-bridge dc-dc converter. The proposed converter provides high power factor and direct power conversion from the line voltage to an isolated dc output voltage...
This paper proposes a push-pull forward three-level converter (PPF TL converter) for high-voltage fuel cell applications. It integrates the advantages of the TL converter and the PPF converter. It can operate at both three-level (3L) mode and two-level (2L) mode, so it is suitable for wide input voltage application, such as fuel cell power system. Half of the switches sustain half of the input voltage...
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