| 摘要 |
The present invention discloses an active clamp forward converter that reduces the charging voltage of clamp capacitors as well as the voltage applied to switching elements, making it possible to reduce the on loss of the switching elements while also enabling the size of the capacitance elements to be reduced. The active clamp forward converter comprises first and second FETs which respectively connects first and second ends of a primary coil of the transformer to positive and negative terminals of a direct current power supply, and third and fourth FETs which respectively connects the first and second ends to the negative and positive terminals of a direct current power supply via capacitors, wherein the pair of first and second FETs and the pair of third and fourth FETs are alternately switched on and off sandwiched about a period when both are off.
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