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公开(公告)号：US20220263428A1
公开(公告)日：2022-08-18
申请号：US17625620
申请日：2020-07-07
Applicant: LG Electronics Inc.
Inventor： Daejoong KIM , Daihyun KIM , Seungwook HYUN
IPC: H02M7/48 , H02M3/335 , H02M1/12 , H02J3/38 , H02M7/5387
Abstract: The present disclosure relates to a power converting apparatus and a photovoltaic module including the same. The power converting apparatus according to an embodiment of the present disclosure includes: an inverter configured to convert input DC power into AC power by a switching operation; an output voltage detector configured to detect an output voltage of the inverter; and a controller configured to control the inverter, wherein the controller is configured to perform proportional resonant control based on the output voltage, and output a switching control signal to the inverter based on the proportional resonant control. Accordingly, it is possible to remove harmonics generated due to connection of a nonlinear load.
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Patent Agency Ranking
公开(公告)号：US20220077818A1
公开(公告)日：2022-03-10
申请号：US17531440
申请日：2021-11-19
Applicant: LG ELECTRONICS INC.
Inventor： Kanghwan JIN , Sunho YU , Kanghwi KIM , Daihyun KIM , Yesl SHIN , Hyeonggu HAN
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.
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公开(公告)号：US20190165193A1
公开(公告)日：2019-05-30
申请号：US16203065
申请日：2018-11-28
Applicant: LG ELECTRONICS INC.
Inventor： Hyeonggu HAN , Kanghwi KIM , Daihyun KIM , Yesl SHIN , Sunho YU , Kanghwan JIN
IPC: H01L31/047 , H02J3/38 , H02M7/44
Abstract: The present invention relates to a photovoltaic module and a photovoltaic system including the same. A photovoltaic module and a photovoltaic system including the same include a solar cell module including a plurality of solar cells, a junction box to convert DC power from the solar cell module to AC power, a first cable through which the AC power from the junction box is output to an outside, and a second cable connected to a controller in the junction box for output or input of communication data. Accordingly, data communication can be easily performed using the controller in the photovoltaic module.
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公开(公告)号：US20240204700A1
公开(公告)日：2024-06-20
申请号：US18485818
申请日：2023-10-12
Applicant: LG Electronics Inc.
Inventor： Bohwan SEO , Daejoong KIM , Daihyun KIM
IPC: H02P3/22 , D06F33/46 , D06F33/47 , D06F34/08 , D06F39/30 , H02K11/33 , H02M1/00 , H02P27/08 , D06F103/46
CPC classification number: H02P3/22 , D06F33/46 , D06F33/47 , D06F34/08 , D06F39/30 , H02K11/33 , H02M1/0009 , H02P27/085 , D06F2103/46 , H02P2201/13
Abstract: A motor driving device includes a direct current (DC) link capacitor configured to store DC power, and an inverter configured to convert the DC power stored in the DC link capacitor into AC power and supply the AC power to a motor. The motor driving device includes a shunt resistor configured to sense current flowing through the inverter and detect whether the current has reached threshold current for controlling a regenerative voltage during a braking operation. A control unit is configured to control an operation of the inverter and perform a regenerative operation when the braking operation is started. The control unit, during the regenerative operation, switches motive power of a drum connected to the motor into regenerative energy and transmit the regenerative energy to the DC link capacitor, by controlling active component current and reactive component current together in response to the reaching of the threshold current.
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公开(公告)号：US20190149086A1
公开(公告)日：2019-05-16
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
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 first switching frequency, and controls other switching elements among the plurality of switching elements included in the inverter to perform switching at a second switching frequency higher than the first switching frequency.
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公开(公告)号：US20200169216A1
公开(公告)日：2020-05-28
申请号：US16696858
申请日：2019-11-26
Applicant: LG ELECTRONICS INC.
Inventor： Hyeonggu HAN , Daihyun KIM , Sunho YU
IPC: H02S40/32 , H02J3/38 , H02M3/335 , H02M7/5387 , H02M1/14
Abstract: Discussed is a photovoltaic module that includes a solar cell module including a plurality of solar cells; a converter to convert a level of a DC power input from the solar cell module; an inverter to convert the DC power into an AC power; and a controller to control the inverter, in which the controller performs asynchronous pulse width modulation control for the inverter, and controls a switching frequency of at least some switching elements in the inverter to be changed for a period including a maximum point or a minimum point of the AC power output from the inverter.
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