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A Novel ZVS PWM FB DC-DC Converter using Auxiliary Resonant Net
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| Author(s) |
Sun Tiecheng, Zhu Xueqin, Liu Hongpeng, Liang Lian, Gao Peng |
| Abstract |
In conventional converter phase-shifted zerovoltage-
switching DC/DC converter, lagging leg losses ZVS
capability at 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 solve these problems. The proposed converter
can not only achieve soft switching but also eliminate the
circulating current by adding an active clamp circuit in the
secondary side and using saturable inductor in the primary
side. In result, soft-switching operation range is extended.
And all switches satisfy ZVS conditions. Synchronous
rectifier technique is adopted in the converter, so the
conduction loss is eliminated. In this paper TMS320F240
DSP is used as control chip, and the digital control system of
the converter is designed. The experimental results show the
feasibility of the proposed converter. |
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| Filename: | T2-223.pdf |
| Filesize: | 407.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-08 by System |
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