Photovoltaic module

A photovoltaic module comprising:

• a solar cell module including a plurality of solar cells;
• a converter to convert a level of first direct current (DC) power input from the solar cell module, and to output second DC power;
• an inverter to convert the second DC power supplied from the converter into alternating current (AC) power;
• and
• a controller to control the converter and the inverter,
• wherein the converter comprises:
• a full-bridge switching part to switch the first DC power;
• a transformer having an input side connected to an output terminal of the full-bridge switching part;
• and
• a half-bridge switching part connected to an output side of the transformer,
• wherein when changing a switching frequency of the full-bridge switching part and the half-bridge switching part, the controller changes a first phase difference between the full-bridge switching part and the half-bridge switching part.

A photovoltaic module comprising:

• a solar cell module including a plurality of solar cells;
• a converter to convert a level of first direct current (DC) power input from the solar cell module, and to output second DC power;
• an inverter to convert the second DC power supplied from the converter into alternating current (AC) power;
• and
• a controller to control the converter and the inverter,
• wherein the converter comprises:
• a full-bridge switching part to switch the first DC power;
• a transformer having an input side connected to an output terminal of the full-bridge switching part;
• and
• a half-bridge switching part connected to an output side of the transformer,
• wherein the controller controls driving of the full-bridge switching part and the half-bridge switching part by separating a section where a switching frequency of the full-bridge switching part and the half-bridge switching part is changed from a section where the switching frequency of the full-bridge switching part and the half-bridge switching part is constant, according to a waveform of an output voltage of the inverter.