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Advantages of using Two-Switch Forward in Single-Stage Power Factor Corrected Power Supplies
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| Author(s) |
L. Petersen |
| Abstract |
A single-Stage power factor corrected power supply using a
two-switch forward is proposed to increase efficiency. The
converter is operated in the DCM (Discontinues Conduction
Mode) and it will be shown that this operation mode insures the
intermediate DC-bus to be controlled only by means of circuit
parameters and therefore independent of load variations. The
DCM operation often has a diminishing effect on the efficiency
but it will be shown that high efficiency with minimum circuit
complexity can be achieved in this mode.
A 500W 70V prototype of the two-switch Boost-Forward PFC
power supply has been implemented. The measured efficiency
is between 85% and 88.5% in the range 30W-500W and the
measured power factor at full load is 0.95. |
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| Filename: | Unnamed file |
| Filesize: | 129.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-20 by System |
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