公开(公告)号：US11211897B2

公开(公告)日：2021-12-28

申请号：US16192390

申请日：2018-11-15

Applicant: LG ELECTRONICS INC.

Inventor： Kanghwan Jin ,  Sunho Yu ,  Kanghwi Kim ,  Daihyun Kim ,  Yesl Shin ,  Hyeonggu Han

IPC: H01L31/044 ,  H02S40/32 ,  H02S40/38 ,  H02S40/34 ,  H02J3/38 ,  H02M7/5387 ,  H02M1/14 ,  H02M3/335 ,  H02M1/44 ,  H02M1/00

Abstract: A photovoltaic module can include a solar cell module including a plurality of solar cells; a converter configured to convert a level of DC power input from the solar cell module; a DC-terminal capacitor configured to store DC power output from the converter; an inverter including a plurality of switching elements and configured to convert DC power from the DC-terminal capacitor into AC power; and a controller configured to control the inverter, in which the converter controls some switching elements among of the plurality of switching elements included in the inverter to perform switching at a third switching frequency, and controls other switching elements among the plurality of switching elements included in the inverter to perform switching at a forth switching frequency higher than the third switching frequency.

公开(公告)号：US11476798B2

公开(公告)日：2022-10-18

申请号：US16598548

申请日：2019-10-10

Applicant: LG Electronics Inc.

Inventor： Sunho Yu ,  Daihyun Kim ,  Hyeonggu Han

IPC: H01F27/04 ,  H02S40/32 ,  H02S40/36 ,  H01F27/28 ,  H01F27/24 ,  H01F27/02

Abstract: Disclosed are a transformer, and a power conversion apparatus or a photovoltaic module including the same. The transformer includes a first core including a base, a first protrusion member to protrude from the base, and a first external wall spaced apart from the first protrusion member and to surround the first protrusion member, a first winding wound in the first core, a second core including a second base, a second protrusion member to protrude from the second base, and a second external wall spaced apart from the second protrusion member and to surround the second protrusion member, a second winding wound in the second core, and a barrier rib configured to separate the first winding and the second winding from each other. Thus, ease of processing is achieved and radiation of electromagnetic noise is reduced.