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Low Power Multiple Output DC Supply – Part I: Flyback Converter with Wide Input Voltage Range
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| Author(s) |
Danijel Voncina, Marko Petkovsek, Janez Nastran, Peter Zajec |
| Abstract |
The paper deals with a front-end topology of a
low power switched-mode power supply intended for a plug
and play use. During its design, a special attention has been
paid to a simple and cost effective solution confronted with a
wide input line-voltage range (57 ÷ 3× 240)⋅(1 ± 0.2) VRMS
and with the frequency range from 40 Hz to 65 Hz. Such
extreme demands are particularly of interest in industrial
applications where devices should be supplied either from
the single- two- or three-phase network. In order to reduce
human errors and production cost, no mechanical switches
are allowed. The paper proposes a novel concept of the
Flyback converter that solves the designated task with
variable turns ratio of the transformer, while keeping the
switching frequency constant. The implemented
transformer with its control circuit enables on-line
adaptation to the temporary value of input phase-voltage.
As a consequence, voltage stress of implemented switching
transistors is also reduced. |
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| Filename: | T2-119.pdf |
| Filesize: | 165.9 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-13 by System |
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