Patent ID: 8107265
Filing Date: 2012-01-31
Classification: H02M,Y02B

Abstract:
1. A DC-DC converter circuit, comprising: a first switching element (S a second switching element (S an output transformer (T), comprising a first primary winding (P 1 ) which is connected in series between said first switching element (S 1 ) and said second switching element (S 2 ), and also a secondary winding for obtaining an output voltage; a smoothing circuit which rectifies and smoothes said output voltage; a first voltage source, connected between a first connection point at which said first primary winding is connected to said second switching element (S a second voltage source, connected between a second connection point at which said first primary winding is connected to said first switching element (S a control unit which alternately turns said first switching element (S a first free wheel diode connected in reverse parallel with said first switching element (S a first snubber circuit connected in parallel with said first switching element (S a second free wheel diode connected in reverse parallel with said second switching element (S a second snubber circuit connected in parallel with said second switching element (S a first regeneration circuit, connected between said first and second voltage sources and said first snubber circuit, and which, during regeneration, regenerates the charge accumulated in said first snubber capacitor and said second snubber capacitor to said first voltage source and said second voltage source; and a second regeneration circuit, connected between said first and second voltage sources and said second snubber circuit, and which, during regeneration, regenerates the charge accumulated in said third snubber capacitor and said fourth snubber capacitor to said first voltage source and said second voltage source; wherein, said first regeneration circuit includes a first resonant section which, during regeneration, causes said first snubber capacitor and said second snubber capacitor to resonate, and a first voltage boost section which is connected in series with said first resonant section, and which outputs a predetermined voltage by converting the primary side voltage of said output transformer; and said second regeneration circuit includes a second resonant section which, during regeneration, causes said third snubber capacitor and said fourth snubber capacitor to resonate, and a second voltage boost section which is connected in series with said second resonant section, and which outputs a predetermined voltage by converting the primary side voltage of said output transformer.