FIG. 12 is a diagram of a circuit of a power converting apparatus in a photovoltaic module according to an embodiment of the present invention.

Referring to FIG. 12, a power converting apparatus 500 in a photovoltaic module 100 according to an embodiment of the present invention may include a converter 530 for converting a level of DC power input from the photovoltaic module 100, and an inverter 570 for converting DC power from a dc terminal into Ac power.

The converter 530 according to an embodiment of the present invention includes: a full bridge switching unit 532 for switching DC power; a transformer 536 having an input side connected to an output terminal of the full bridge switching unit 532; a synchronization rectification unit 538 connected to an output side of the transformer 536; and a resonance capacitor Cr and a resonance inductor Lr, which are connected between the transformer 536 and the synchronization rectification unit 538.

In particular, ripples in an input current may be suppressed by resonance that is caused by the resonance capacitor Cr, the resonance inductor Lr, and the transformer 536.

Meanwhile, switching elements Q1 to Q4 in the full bridge switching unit 532 may perform Zero Voltage Switching (ZVS) and Zero current Switching (ZCS) by the resonance capacitor Cr and the resonance inductor Lr.