SINGLE-STAGE AC/DC CONVERTER USING INTEGRATED CM/DM CHOKE

摘要

The present invention relates to a single-stage AC/DC converter using an integrated CM/DM choke capable of removing an existing inductor and diode, using an integrated CM/DM choke to reduce the number of elements, and improving power factor. The present invention includes a power part which applies AC input power (V1); a resonance circuit part which is connected to the power part and improves power factor; a bridge diode part which is connected to the power part and provides a current path; an integrated CM/DM choke part which removes conduction noise according to current flow from the power part; a bulk capacitor which stores a DC voltage smoothed through the bridge diode part by corresponding to the AC voltage of the power part; a transformer circuit part which transmits DC voltage stored in the bulk capacitor to a secondary side and outputs the voltage to the secondary side; and a switching device which is connected to the bulk capacitor and the transformer circuit part and performs switching to apply DC voltage stored in the bulk capacitor to the transformer circuit part.