| 摘要 |
PROBLEM TO BE SOLVED: To supply the energy of a clamping circuit to a secondary circuit which supplies a load voltage without wasting the energy by a method, wherein an energy feedback means is connected to a clamp junction point, in order to feed back an energy to the secondary circuit from a clamping capacitor. SOLUTION: The cathodes of clamping diodes 44 and 45 of a clamping circuit 52 are connected to each other at a clamp junction point 46. Also, a clamping capacitor 43 is connected between a clamp junction point 46 and a common ground 25. Further, the clamping capacitor 43 is connected to the center tap 57 of a secondary winding 23 through an inductor 54 and a resistor 55. A protective diode 56 is connected between both the terminals of the inductor 54, so as to have its cathode connected to the terminal on the clamp junction 46 side. Energy stored in the clamping capacitor 43 is introduced into a secondary circuit 53. With this constitution, losses produced in the clamping circuit 52 of a conventional constitution are eliminated, so that a high efficiency converter is obtained. |
