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A bidirectional DC-DC converter with high step-down and step-up voltage conversion ratio is proposed in this paper. Two capacitors series in the high-voltage side of proposed converter are used for voltage division. The divided voltages are then discharged to and charged from the low-voltage side by a modified two-phase interleaved buck-boost converter, respectively. Due to stacking architecture of...
In this paper, A novel ZVZCS active clamped dual switch flyback converter was proposed, whose main switches and auxiliary switch all realize zero-voltage turning-on, and the rectifier diode on the secondary side also achieves ZCS. It overcomes the demerit of high voltage stress on the main switch in conventional flyback converter; meanwhile the duty circle can extend to more than 50% by slope compensation...
In this paper, a family of ZVZCS dual switch flyback dc-dc converters were analyzed, which all feature soft-switching, low voltage stresses and good adaptability of wide range input. The main switches and auxiliary switch of these converters realize zero-voltage turning-on (ZVS) and the rectifier diode achieves zero-current turning-off (ZCS). They adopt different auxiliary circuit to realize soft-switching...
Active clamped asymmetrical dual switch forward (ACADSF) converter is a preferable candidate standard dc-dc module for high line and wide range input application in low to medium power rating systems. To make the ACADSF be more suitable for practical applications, a novel ACADSF converter was proposed, which, compared with original ACADSF, maintains the advantages that duty cycle can be more than...
A novel wide range input front-end dc-dc converter featuring in optimized overall input range efficiency is presented in this paper. This proposed converter combines the two kinds of dual switch ZVS forward-flyback topologies together, while the DC Gain for these two kinds of forward-flyback topologies is different and that of secondary full-bridge rectifier is doubled than current-doubler rectifier...
This paper illustrates the rectifier stress issue of the active clamped dual switch forward converters operating on discontinuous current mode (DCM), and analyzes the additional reverse voltage on the rectifier diode of active clamped dual switch forward converter at DCM operation, which does not appear in continuous current mode (CCM). The additional reverse voltage stress, plus its spikes, definitely...
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