| 摘要 |
PROBLEM TO BE SOLVED: To suppress the surge voice of a DC-DC converter by suppressing power losses generated in a rectifier and snubber circuit by connecting the other ends of first and third (or second and fourth) switching elements and the anodes (cathodes) of second and fourth (or first and third) flywheel diodes to the anode (cathode) of a DC power source. SOLUTION: The other ends of the first and third (second and fourth) switching elements 1 and 3 (2 and 4) and the anodes (or cathodes) of second and fourth (first and third) flywheel diodes 6 and 8 (7 and 9) are collectively connected to the anode (cathode) of a DC power source 5 at a connecting point A (F) and, at the same time, the output terminals of first and second rectifier diodes 13 and 14 are connected in parallel with a load resistor 18. Since no active reverse current is abruptly impressed upon the switching elements 1-4 from the forward current of a secondary-side rectifier, the very large spike-like current which flows, when the switching elements 1-4 are switched, does not flow and the losses and noise which occurs in the elements 1-4 and rectifier can be reduced. |
