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A BIBRED with improved output voltage
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| Author(s) |
V. Tuomainen; J. Kyyrä |
| Abstract |
BIBRED is a well-known Single-Stage AC/DC converter. It is able to produce an input current with
low harmonic content and a regulated and isolated output voltage with only one switching stage.
Input stage is kept in discontinuous conduction mode and the duty ratio is kept essentially constant
during a line cycle in order to get a sinusoidal input current. This leads however to a harmful voltage
ripple on the output voltage at double line frequency and in the worst case a low frequency oscillation
between the output side capacitors of BIBRED. The origin of the problem and the operation
principles of the converter are presented and discussed in the paper. A simple way to avoid the ripple
on the output voltage and to damp the oscillation without actively controlling the circuit is presented
in the paper. It is shown that a diode in series with the output inductor attenuates the ripple at the
output and confines the ripple to the auxiliary capacitor at the secondary side of BIBRED. Simulated
and measured results are shown in the paper. |
| Download |
| Filename: | EPE2001 - PP00737 - Tuomainen.pdf |
| Filesize: | 303.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-11 by System |
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