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A continuous current mode boost converter with modified flying capacitor lossless snubber is proposed in this paper. The proposed converter charges the flying capacitor using a coupled inductor without the help of the reverse recovery current. As a result, it can reduce switching loss and guarantee the wide snubber reset ranges. The operation principle, characteristics, and experimental results are...
This paper proposes a new 3-phase interleaved LLC resonant DC-DC converter and its control scheme. The proposed circuit consists of three conventional interleaved LLC resonant DC-DC converters and each converter operates with π/3 of phase difference respectively. Therefore the current ripple of the output capacitor can be significantly reduced and the life cycle of the converter will be extended....
Conduction loss reduction technique using a small resonant capacitor for a phase shift full bridge converter with clamp diodes is proposed in this paper. The proposed technique can be implemented simply by adding a small resonant capacitor beside the leakage inductor of transformer. Since the voltage across the small resonant capacitor is applied to the small leakage inductor of transformer during...
An adaptive link capacitor voltage variation control method for server power supply is proposed. In this paper, to increase the efficiency under light load condition, the proposed scheme adjusts nominal link capacitor voltage with the consideration of the hold-up time requirement. Thereby, the effective duty ratio of DC/DC stage can be expanded and we can save the power loss. Therefore, power losses...
A new half bridge converter without DC offset of magnetizing current is proposed. The ZVS operation of proposed converter is maintained by only reflected load current because it doesnpsilat have DC offset of magnetizing current as the duty changes. Therefore it has high efficiency and high power density especially when it has a wide input range. The operational principle, large signal modeling and...
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