Lg Electronics Inc.

Postech Academy-industry Foundation

Google Inc.

Youngchan Park

Suchang Lee

Juhwan Yun

Hyeonjae Lee

Yoongeol Choi

Bongkoo Kang

Hyeonseok Lee

Yong Min Song

Sun-gi Hong

Moonho Park

Joongtae Kim

Jangyong Kim

Jaedong Lee

A photovoltaic module includes: a photovoltaic solar cell module; a junction box disposed on a back surface of the photovoltaic solar cell module, and to convert a DC power from the photovoltaic solar cell module to an AC power; and a first cable electrically connected to the junction box and to output the AC power. The junction box includes an insulating case having an insulating material, and disposed on the back surface of the photovoltaic solar cell module, and a circuit board within the insulating case, and mounted thereon a converter for converting a level of the DC power from the photovoltaic solar cell module, and an inverter for converting a DC power from the converter into an AC power. Th first cable includes first and second conductive lines for outputting the AC power output from the circuit board to the outside, without a grounding line.

Photovoltaic module, trunk cable, and photovoltaic module including the same

Discussed are a power converting apparatus, a photovoltaic module, and a photovoltaic system including the photovoltaic module and the power converting apparatus. The power converting apparatus is capable of converting direct current (DC) power from the solar cell module into alternating current (AC) power, outputting the AC power to a grid, and detecting a signal indicative of abnormality in grid power caused by power cut or the like, thereby preventing an islanding operation.

Power converting apparatus, photovoltaic module, and photovoltaic system including the same

Discussed are a photovoltaic module and a photovoltaic system including the same. According to an embodiment, the photovoltaic module includes a solar cell module including a plurality of solar cells, and a junction box attached to a back surface of the solar cell module, wherein the junction box includes a capacitor unit to store a direct current (DC) power from the solar cell module, and a shutdown unit disposed at a front end of the capacitor unit and to operate to consume the DC power stored in the capacitor unit and temporarily interrupt power output of the solar cell module when the DC power from the solar cell module is outside of a permissible range. Thus, when DC power outside of the permissible range is supplied, the power output can be quickly interrupted while the DC power stored in the capacitor is consumed.

Photovoltaic module and photovoltaic system including the same

A power conversion device includes a coupled inductor having a first inductor and second inductor, connected to a DC source; a full-bridge switching unit including a first leg having a first switching element and a second switching element serially connected to the first switching element, and a second leg having a third switching element and a fourth switching element serially connected to the third switching element, wherein the first leg connected to the first inductor and the second leg connected to the second inductor; a transformer connected to the full-bridge switching unit; a third inductor connected in parallel with the transformer; and a storage capacitor connected to the full-bridge switching unit.

Power conversion device and photovoltaic module including the same

Disclosed herein are a photovoltaic module and a photovoltaic system including the photovoltaic module. The photovoltaic module includes a solar cell module having a plurality of solar cells, an inverter to convert DC power from the solar cell module to AC power, a cable to output the AC power from the inverter, and an infrared (IR) communication unit to transmit, at least one of voltage information of the solar cell module, current information of the solar cell module, voltage information of the inverter, and current information of the inverter, to an adjacent first photovoltaic module, an external gateway, or an external IR communication device. Thereby, communication with an external terminal can be easily performed.

Disclosed are a power conversion device and a photovoltaic module including the same. The power conversion device includes a full-bridge switching unit including first to fourth switching elements, a first transformer having an input terminal connected between the first switching element and the second switching element in the full-bridge switching unit and an output terminal connected between the third switching element and the fourth switching element in the full-bridge switching unit, wherein the first switching element is serially connected to the second switching element, and the third switching element is serially connected to the fourth switching element, and a second transformer connected to the full-bridge switching unit as a half-bridge, wherein the full-bridge switching unit coverts a first DC power input to the first transformer into a first alternating current AC waveform, based on variable duty switching.

A photovoltaic module and a photovoltaic system including the same are disclosed. The photovoltaic module includes a solar cell module, a converter unit to convert levels of direct current (DC) power from the solar cell module, an inverter unit to convert the DC power into alternating current (AC) power, a cable electrically connected to the inverter unit and to output the AC power to an outside, a communication unit to exchange data with another photovoltaic module, and a controller to control outputting of at least one of phase information and amplitude information of the photovoltaic module for adjusting at least one of a phase and an amplitude of the another photovoltaic module, when the photovoltaic module is set as a master. Consequently, the phase and/or the amplitude of AC power output from another photovoltaic module may be adjusted to be equal.

Photovoltaic module and photovoltaic system comprising the same

A technique is provided for search. The technique includes providing content. The technique includes receiving gesture data from a user, wherein the gesture data reflects a selection of a substantially enclosed area of the display screen. The technique includes, in response to receiving the gesture information, determining one or more search criteria associated with content within the enclosed area, and providing data related to the one or more search criteria.

Growing community of inventors

Seoul, South Korea

Youngchan Park