Abstract: Disclosed are a core, a transformer, a power converting apparatus, and a photovoltaic module including the same. The core includes: a base; outer wall formed on the base; a first protruding member protruding on the base and disposed within the outer wall; and a second protruding member protruding on the base, disposed within the outer wall, and separated from the first protruding member, wherein a length of an edge of the second protruding member opposing the first protruding member is less than an outer circumference of the first protruding member. Accordingly, the second protruding member may be machined so easily that a leakage inductance can be easily controlled according to design specification.

Abstract: Disclosed are a core, a transformer, a power converting apparatus, and a photovoltaic module including the same. The core includes: a base; outer wall formed on the base; a first protruding member protruding on the base and disposed within the outer wall; and a second protruding member protruding on the base, disposed within the outer wall, and separated from the first protruding member, wherein a length of an edge of the second protruding member opposing the first protruding member is less than an outer circumference of the first protruding member. Accordingly, the second protruding member may be machined so easily that a leakage inductance can be easily controlled according to design specification.

Abstract: Discussed are a power conversion apparatus and a photovoltaic module including the power conversion apparatus. The power conversion apparatus includes a converter unit to convert DC voltage from a solar cell module, the converter unit including a plurality of interleaving converters, and a controller to control the converter unit, wherein the controller changes switching periods of the interleaving converters and changes phase differences between the interleaving converters during operation sections of the interleaving converters, in response to a change of the switching periods of the interleaving converters. Consequently, it is possible to prevent instantaneous reduction of output power due to change of switching frequencies of the interleaving converters.

Abstract: A photovoltaic module is discussed. The photovoltaic module includes a solar cell module including a plurality of solar cells and a junction box attached to a rear surface of the solar cell module, the junction box including a power conversion module to convert direct current (DC) voltage supplied from the solar cell module into alternating current (AC) voltage and to output the AC voltage, wherein the power conversion module included at least one bypass diode to receive the DC voltage from the solar cell module, a converter unit to power-convert the DC voltage from the at least one bypass diode, the converter unit including at least three interleaving converters, a capacitor to store voltage output from the converter unit, and an inverter unit to output the AC voltage using the voltage stored in the capacitor. Consequently, it is possible to stably output AC voltage.

Abstract: A photovoltaic module is discussed. The photovoltaic module includes a solar cell module including a plurality of solar cells and a junction box attached to a rear surface of the solar cell module, the junction box including a power conversion module to convert direct current (DC) voltage supplied from the solar cell module into alternating current (AC) voltage and to output the AC voltage, wherein the power conversion module included at least one bypass diode to receive the DC voltage from the solar cell module, a converter unit to power-convert the DC voltage from the at least one bypass diode, the converter unit including at least three interleaving converters, a capacitor to store voltage output from the converter unit, and an inverter unit to output the AC voltage using the voltage stored in the capacitor. Consequently, it is possible to stably output AC voltage.

Abstract: Discussed are a power conversion apparatus and a photovoltaic module including the power conversion apparatus. The power conversion apparatus includes a converter unit to convert DC voltage from a solar cell module, the converter unit including a plurality of interleaving converters, and a controller to control the converter unit, wherein the controller changes switching periods of the interleaving converters and changes phase differences between the interleaving converters during operation sections of the interleaving converters, in response to a change of the switching periods of the interleaving converters. Consequently, it is possible to prevent instantaneous reduction of output power due to change of switching frequencies of the interleaving converters.