Patent ID: 8248824
Filing Date: 2012-08-21
Classification: H01F,H02M

Abstract:
1. A DC power source apparatus for converting a DC input voltage from a DC power source into high-frequency power by turning on/off a switching element connected to a primary winding of a transformer, converting the high-frequency power transmitted to a secondary winding of the transformer into a DC output voltage through a rectifying-smoothing circuit, and controlling an ON/OFF period of the switching element according to the DC output voltage through a controller so as to supply a predetermined output voltage to a load, the power source apparatus comprising: a plurality of core winding sets forming the primary and secondary windings, each having a primary winding wound around a core defining a closed magnetic path and a secondary winding externally wound around the primary winding; the primary winding of each of the core winding sets comprises a plurality of winding layers among which a lowermost one that is closest to the core is connected to the switching element; and the core is a combination of U-shaped cores which defines the closed magnetic path.