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公开(公告)号：US12160167B2
公开(公告)日：2024-12-03
申请号：US17939260
申请日：2022-09-07
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhen Cao , Jie Kong , Zhong Wang , Tao Zhang , Tao Shi
Abstract: A short-circuit protection apparatus includes a first detection branch, a second detection branch, and a controller. The first detection branch includes a first sampling resistor and a first sampling capacitor that is connected in parallel to the first sampling resistor. A difference between an absolute value of a second sampling voltage and an absolute value of a first sampling voltage is a first difference. The controller obtains a comparison result between an absolute value of a first sampling voltage at two terminals of the first sampling resistor and an absolute value of a second sampling voltage at two terminals of the second sampling resistor, and if a difference between the absolute value of the second sampling voltage and the absolute value of the first sampling voltage is a second difference and the second difference is less than the first difference, controls the target circuit to stop working.
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公开(公告)号：US11824493B2
公开(公告)日：2023-11-21
申请号：US17826475
申请日：2022-05-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: A power converter box and at least one junction box are integrated on a backplane of the photovoltaic module as a whole, and there is a cable for connecting the power converter and the junction box. In this case, relative to the conventional technology in which a junction box is independent of a power converter, a length of a cable used when the junction box and the power converter box are taken as a whole is shorter than a length of a cable used in the conventional technology. In this case, compared with the conventional technology in which a cable is connected to an independently placed power converter, the power converter only needs to establish a connection relationship by using a solder ribbon, a circuit board cable, and the like with low costs, so that production costs are low.
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公开(公告)号：US20230076274A1
公开(公告)日：2023-03-09
申请号：US17939260
申请日：2022-09-07
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhen Cao , Jie Kong , Zhong Wang , Tao Zhang , Tao Shi
Abstract: A short-circuit protection apparatus includes a first detection branch, a second detection branch, and a controller. The first detection branch includes a first sampling resistor and a first sampling capacitor that is connected in parallel to the first sampling resistor. A difference between an absolute value of a second sampling voltage and an absolute value of a first sampling voltage is a first difference. The controller obtains a comparison result between an absolute value of a first sampling voltage at two terminals of the first sampling resistor and an absolute value of a second sampling voltage at two terminals of the second sampling resistor, and if a difference between the absolute value of the second sampling voltage and the absolute value of the first sampling voltage is a second difference and the second difference is less than the first difference, controls the target circuit to stop working.
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Patent Agency Ranking
公开(公告)号：US12249905B2
公开(公告)日：2025-03-11
申请号：US18174855
申请日：2023-02-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhen Cao , Dong Chen , Xiaofeng Yao
Abstract: A serial-parallel converter protection system includes a controller, a drive, a first switching transistor, and a second switching transistor. An input terminal of a converter is connected to an output terminal of the converter through the first switching transistor. The output terminal of the converter is connected in parallel with the second switching transistor. When an output voltage of the converter is greater than a first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on. In some embodiments, when the output voltage of the converter is greater than the first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on, so that the converter is bypassed, thereby preventing a voltage and a current from impacting a component inside the converter.
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公开(公告)号：US20240063754A1
公开(公告)日：2024-02-22
申请号：US18496226
申请日：2023-10-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhen Cao , Dong Chen , Xiaofeng Yao , Jiebin Cheng , Guilei Gu
Abstract: This application provides a power converter box used in a photovoltaic system. The power converter box includes at least two power converters, and the at least two power converters include one primary power converter and at least one secondary power converter. The primary power converter obtains status information of a photovoltaic substring corresponding to a secondary power converter, and sends, to an inverter by using a PLC communication module in the primary power converter, the status information of the photovoltaic substring corresponding to the secondary power converter and status information of a photovoltaic substring corresponding to the primary power converter. The primary power converter further receives, by using the PLC communication module in the primary power converter, control information sent by the inverter, controls, based on the control information, an output power of the photovoltaic substring corresponding to the primary power converter.
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公开(公告)号：US20230327543A1
公开(公告)日：2023-10-12
申请号：US18305215
申请日：2023-04-21
Applicant: Huawei Digital Power Technologies Co., Ltd. , SPIC Qinghai Photovoltaic Industry Innovation Center Co.,Ltd.
Inventor： Zhen Cao , Lei Shi , Yunfeng Liu , Feng Chong , Hualong Fan , Jiajia He , Shaopan Hou , Jie Zhang
Abstract: A backfeed soft-start circuit for a photovoltaic inverter is provided. The backfeed soft-start circuit includes a plurality of branch switches. A solar photovoltaic array includes a plurality of photovoltaic modules, where the plurality of branch switches are in a one-to-one correspondence with the plurality of photovoltaic modules, and when the plurality of branch switches are turned on, the corresponding photovoltaic modules are connected to the backfeed soft-start circuit; and a primary switching switch. The branch switches is connected to a corresponding photovoltaic module, and the primary switching switch. The primary switching switch is turned on after the branch switch is turned on.
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公开(公告)号：US20230115497A1
公开(公告)日：2023-04-13
申请号：US17964128
申请日：2022-10-12
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dong Chen , Zhen Cao , Xiaofeng Yao , Jiebin Cheng , Guilei Gu
IPC: H02J3/38 , H02M1/32 , H02M1/36 , H02M3/158 , H03K17/082
Abstract: A power converter analog chip includes a sampling circuit configured to collect electrical parameters of the power converter; a maximum power point tracking circuit configured to perform maximum power point tracking based on the input power or the output power obtained by the electrical parameters, and to obtain an adjustment signal; a rapid shutdown circuit configured to, when receiving a rapid shutdown instruction sent from the outside of the analog chip, generate a rapid shutdown signal; a protection circuit, configured to, when an electrical parameter of the power converter exceeds a first preset threshold, generate a protection signal and send the protection signal to the multiplexer; and a multiplexer configured to select one of the rapid shutdown signal, the protection signal, or the adjustment signal as a control signal, to control a power component in the power converter.
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公开(公告)号：US11979019B2
公开(公告)日：2024-05-07
申请号：US17446492
申请日：2021-08-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xun Wang , Zhen Cao , Yongbing Gao
CPC classification number: H02H7/122 , H02H7/1213
Abstract: A breaker apparatus and an inverter system are configured to disconnect an electrical connection when a fault occurs in a protected circuit. The breaker apparatus is connected in series in a protected circuit, and is configured to disconnect the electrical connection when a fault occurs in the protected circuit. The breaker apparatus includes a first branch, and a second branch. The first branch includes an overcurrent-automatic-disconnection unit and a first current limiting unit that are connected in series, where the overcurrent-automatic-disconnection unit is configured to be automatically disconnected when a current flowing through the overcurrent-automatic-disconnection unit exceeds a breaking current threshold. The a second branch is configured to be open or closed under control of the controller. The controller is configured to control the first controllable switch unit to be closed when the protected circuit operates normally, and control the first controllable switch unit to be open when a fault occurs in the protected circuit.
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