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发表于 2010-3-6 12:53:14
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The topology is derived from the basic two-switch forward
converter, but incorporates an additional transformer winding,
inductor, and a few diodes. The proposed circuit inherently
forces the input current to be discontinuous and ac modulated
to achieve high-input power factor. The converter output is
operated in discontinuous mode to minimize the bulk capacitor
voltage variations when the output load is varied. Analysis of
the converter is presented, and performance characteristics are
given. Design guidelines to select critical components of the circuit
are presented. |
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