This embodiment is a single-power stage AC-DC converter, which is connected to a three-phase or single-phase AC power source to receive AC power, and to the input filter and the input filter to improve the input power factor and total harmonic distortion of the AC power source. It includes an input rectifying unit for rectifying the AC power transmitted through a plurality of connected step-up inductors and converting it into DC power, and a DC-DC converter for converting and outputting the level of the DC power, and the DC-DC converter includes a link ( Link) a plurality of input capacitors and a plurality of switching elements, each connected in series, and one resonant tank connected to at least one of the plurality of switching elements-the resonant tank includes a transformer, a resonant capacitor and a flying capacitor. A primary circuit including a voltage applied to a secondary winding of the transformer according to an alternating switching operation of a plurality of switching elements; And it is connected to the secondary winding of the transformer provides a single power stage AC-DC converter including a secondary output rectifying unit including a plurality of diodes to rectify the resonant load current individually.
展开▼
