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A New Zero-Voltage-Switching Phase-Shifted Pwm Full-Bridge Dc/dc Converter Using Auxiliary Resonant Net
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| Author(s) |
Tiecheng Sun, Yaxiu Sun, Bing Li |
| Abstract |
In conventional phase-shifted zero-voltage-switching
(ZVS) dc/dc converter, lagging leg loses ZVS capability under
light load conditions, and output rectifier diodes operate with
hard switching. A novel soft-switching bi-directional converter
employing auxiliary resonant net is proposed to resolve these
problems. To achieve higher power performance such as more
powerful control ability, quick control speed and better
reliability TMS320F240 DSP is used as control chip here. The
flow and size of current is controlled by phased-shifted
pulse-width-modulated in the converter. The novel converter
can not only achieve soft switching but also eliminate the
circulating current by adding an active-clamp circuit on the
secondary side and using saturable inductor on the primary side.
In result, soft-switching operating range is extended and all
switches have ZVS conditions. Design and experiment result
are presented. |
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| Filename: | A22612 |
| Filesize: | 190.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-15 by System |
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