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Step-Up ZVS Full-Bridge Converter with Primary-Side Loss Reduction
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| Author(s) |
Hung-I HSIEH |
| Abstract |
A step-up ZVS full-bridge (FB) converter with a primary-side energy recovery circuit (PERC) is proposed. The PERC means can recover the power loss due to high spike current hiding in primary inductance when the phase-shift switching activates. High ringing currents occurring at the beginning of the two resonances each half-period can then be smoothly transferred to DC bus and restrain the resonant current profile from spike current, that provides normal operation for step-up mode conversion. High power efficiency up to 87\%-97\% is achieved for wide load range by PERC means, which improves efficiency over 3-5\% than the conventional case. A practical 400W step-up ZVS FB converter with PERC is realized to assess the conversion performance and compare with the prior works. |
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| Filename: | 0881-epe2009-full-15084521.pdf |
| Filesize: | 671.1 KB |
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| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
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