A High‐Frequency‐Link Secondary‐Side Phase‐Shifted ZVS‐PWM DC–DC Converter with ZCS Active Rectifier
A High‐Frequency‐Link Secondary‐Side Phase‐Shifted ZVS‐PWM DC–DC Converter with ZCS Active Rectifier
Performance evaluations of a secondary‐side phase shift (SPS) pulse‐width‐modulation (PWM)‐controlled zero‐voltage soft‐switching (ZVS) dc–dc converter with a zero current soft‐switching (ZCS) active rectifier are presented in this paper. In the proposed dc–dc converter, soft‐switching operations are achievable from full to null loads by utilizing the parasitic inductances of the high‐frequency (HF) transformer. In addition, no circulating current emerges in either the primary‐ or secondary‐side full‐bridge circuits, and thus the related idling power losses can be minimized. In this paper, the soft‐switching operations over the wide‐range load variations are verified, and the characteristics of output power and voltage versus phase‐shift angle regulations are demonstrated in an experiment based on a 1 kW to 50 kHz laboratory prototype of the proposed dc–dc converter. Furthermore, the converter power losses, which include the switching and conduction power losses, are analyzed, after which the effectiveness of the proposed dc–dc converter is evaluated from a practical point of view.
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A High‐Frequency‐Link Secondary‐Side Phase‐Shifted ZVS‐PWM DC–DC Converter with ZCS Active Rectifier
Electrical engineering in Japan ; 192 , 1
2015
Article (Journal)
English
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