公开(公告)号：US11133776B2

公开(公告)日：2021-09-28

申请号：US16138429

申请日：2018-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Giyob Park ,  Myonghwan Kim ,  Byoungsu Yoon ,  Youngbok Jung ,  Kyungsoo Jung

IPC: H02S40/32 ,  H02S40/34 ,  H02S40/38 ,  H01L31/05 ,  H02M7/48 ,  H02J3/38 ,  H02M1/00 ,  H02M7/44

Abstract: Discussed is a photovoltaic module including: 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 changes a switching frequency of the full-bridge switching part and the half-bridge switching part in a first section of a waveform.

公开(公告)号：US10381839B2

公开(公告)日：2019-08-13

申请号：US15459350

申请日：2017-03-15

Applicant: LG ELECTRONICS INC.

Inventor： Dongho Han ,  Giyob Park ,  Myonghwan Kim ,  Yunsu Bae

IPC: H02J3/38 ,  H02J3/46 ,  H01L31/02 ,  H02M3/335 ,  H02S40/32 ,  H02S40/34 ,  H02S50/00 ,  H01L31/048

Abstract: A photovoltaic module includes a solar cell module including multiple solar cells, and first and second conductive lines connected respectively to first and second solar cells among the solar cells, and a junction box attached to the solar cell module. The junction box includes a power conversion unit including a capacitor unit located between the first and second conductive lines, a converter unit to change the level of a DC voltage at opposite ends of the capacitor unit and to output the DC voltage, and a controller to control the converter unit. When shading occurs in some of the solar cells, the power conversion unit supplies a second current, the level of which is lower than the level of a first current supplied before shading occurs, whereby the possibility of generation of a hot spot may be reduced despite the absence of bypass diodes when shading occurs.

公开(公告)号：US09716466B2

公开(公告)日：2017-07-25

申请号：US14479120

申请日：2014-09-05

Applicant: LG ELECTRONICS INC.

Inventor： Dongho Han ,  Myonghwan Kim ,  Myungsoo Ham ,  Hyunho Do

IPC: H02M3/24 ,  H02S40/32 ,  H02S40/34 ,  H04B3/54 ,  H02J3/38 ,  H02M7/48 ,  H02J13/00 ,  H02M3/28 ,  H02M1/00

CPC classification number: H02S40/32 ,  H02J3/383 ,  H02J13/0031 ,  H02M3/285 ,  H02M7/48 ,  H02M2001/007 ,  H02S40/34 ,  H04B3/54 ,  H04B2203/5416 ,  Y02E10/563 ,  Y02E40/72 ,  Y04S10/123

Abstract: A power conversion apparatus, a photovoltaic module, and a communication device and a photovoltaic system including the same are discussed. The power conversion apparatus includes an inverter unit to perform alternating current (AC) voltage conversion based on direct current (DC) voltage from a solar cell module, a controller to control the inverter unit, and a communication unit to add a carrier frequency signal containing predetermined information to the converted AC voltage and output the AC voltage containing the predetermined information to a grid and, when a level of the converted AC voltage is equal to or less than a predetermined level, to add the carrier frequency signal containing the predetermined information to DC voltage and output the DC voltage containing the predetermined information to the grid. Consequently, it is possible to stably transmit information.

公开(公告)号：US09281759B2

公开(公告)日：2016-03-08

申请号：US13749870

申请日：2013-01-25

Applicant: LG ELECTRONICS INC.

Inventor： Kiok Lee ,  Eonjoo Hwang ,  Myonghwan Kim

IPC: H02J5/00 ,  H02M7/537 ,  H02M3/156 ,  H02M3/158 ,  H02M7/5387 ,  H02M3/335 ,  H02J3/38 ,  H02M1/00

CPC classification number: H02M7/537 ,  H02J3/385 ,  H02J5/00 ,  H02M3/156 ,  H02M3/1582 ,  H02M3/1584 ,  H02M3/3353 ,  H02M7/53871 ,  H02M2001/007 ,  H02M2003/1586 ,  Y02E10/58

Abstract: A power converting apparatus and a photovoltaic module are discussed. The power converting apparatus includes a converter including a tapped inductor and a first switch, the converter converting a level of an input direct current (DC) voltage and outputting the level-converted DC voltage, and an inverter including a plurality of switches, the inverter converting the level-converted DC voltage into an alternating current (AC) voltage. The inverter operates separately in a first switching mode where the inverter performs a switching operation at a first frequency for a first period of the converted AC voltage and a second switching mode where the inverter performs a switching operation at a second frequency for a second period of the converted AC voltage, the second frequency being lower than the first frequency.

Abstract translation: 讨论了功率转换装置和光伏模块。 电力转换装置包括转换器，包括抽头电感器和第一开关，转换器转换输入直流（DC）电压的电平并输出电平转换的直流电压，以及逆变器包括多个开关，逆变器 将电平转换的DC电压转换成交流（AC）电压。 逆变器在第一开关模式下分别操作，在第一开关模式中，在转换的交流电压的第一周期中逆变器以第一频率进行开关操作，以及第二开关模式，其中逆变器以第二频率执行开关操作第二周期 转换的交流电压，第二频率低于第一频率。