Phase shift controlled converter

Abstract

To ensure stable operation by preventing an increase of cost, an increase of a power loss and efficiency reduction due to enlargement of an output rectification element.SOLUTION: A phase shift controlled converter includes: a first series circuit 10 in which a plurality of switching elements is connected in series on a primary side of a transformer; a second series circuit 20 which is configured by connecting a plurality of switching elements in series and connected in parallel with the first series circuit 10; a control section 60 which controls ON / OFF of the plurality of switching elements constituting the first series circuit 10 and the second series circuit 20; a first inductor L1 of which one end is connected to a primary-side coil of a transformer 30 and the other end is connected to a midpoint of the first series circuit 10; a rectification circuit 40 which consists of an output rectification element on the side of a secondary-side coil of the transformer 30 and rectifies AC power which is outputted from the transformer 30; and a smoothing circuit 50 which smooths output from the rectification circuit 40. The phase shift controlled converter comprises a capacitor C3 which is connected in parallel with the primary-side coil of the transformer 30.SELECTED DRAWING: Figure 1

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