公开(公告)号：US12273048B2

公开(公告)日：2025-04-08

申请号：US17854424

申请日：2022-06-30

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Dong Chen ,  Yanzhong Zhang ,  Lei Shi

IPC: H02M7/538 ,  H02M1/00 ,  H02M1/08 ,  H02M7/483 ,  H02M7/5387

Abstract: Embodiments of this application disclose an inverter apparatus and an inverter apparatus control method. The inverter apparatus includes an inverter circuit and a control unit, and the control unit detects a driving mode of the inverter circuit based on a running state of the inverter circuit. When the inverter circuit outputs reactive power and an output current amplitude is greater than a current threshold, the control unit controls the inverter circuit in a full-bridge two-level bipolar control mode; and in other cases, the control unit controls the inverter circuit in a three-level control mode. This reduces a risk of breaking down horizontal bridge semiconductor switching devices by a voltage spike in an active turn-off process.

公开(公告)号：US12244222B2

公开(公告)日：2025-03-04

申请号：US18162524

申请日：2023-01-31

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yongbing Gao ,  Dong Chen ,  Lei Shi

IPC: H02M1/36 ,  H02M1/44 ,  H02M7/5387 ,  H02J3/00

Abstract: Embodiments of this application provide a power conversion circuit, a power transmission system, and a photovoltaic device. The power conversion circuit includes: a first bridge arm, where the first bridge arm includes a first upper bridge arm and a first lower bridge arm; the first upper bridge arm includes a switching component connected between an input positive end and an output end; the first lower bridge arm includes a switching component connected between the output end and an input negative end; each of the switching components includes a switching transistor and a first diode anti-parallel connected to the switching transistor.

公开(公告)号：US12107541B2

公开(公告)日：2024-10-01

申请号：US17404407

申请日：2021-08-17

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Dong Chen ,  Lei Shi ,  Zhaohui Wang

IPC: H02S50/10 ,  H02S40/32 ,  H02S40/38

CPC classification number: H02S50/10 ,  H02S40/32 ,  H02S40/38

Abstract: A photovoltaic power generation system includes a plurality of photovoltaic modules, a plurality of optimizers, and an inverter. Each optimizer is connected to at least one photovoltaic module, and output ends of the plurality of optimizers are connected in series to form a string and then connected to the inverter. The optimizer includes a conversion unit, and a control unit configured to control the conversion unit. The optimizer further includes an auxiliary power source, an energy storage unit, and a first unidirectional conduction unit that are connected between the conversion unit and the control unit. The control unit is configured to perform IV curve scanning for each voltage segment, where the voltage segments are obtained by segmenting a range of an output voltage of a photovoltaic module corresponding to the optimizer from an open-circuit voltage to a preset minimum voltage, and at least two voltage segments are obtained through division.

公开(公告)号：US20240030703A1

公开(公告)日：2024-01-25

申请号：US18479625

申请日：2023-10-02

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Dong Chen ,  Lei Shi ,  Jun Wang

IPC: H02H7/122 ,  H02J3/00 ,  H02H3/38 ,  H02M1/32

CPC classification number: H02H7/122 ,  H02J3/001 ,  H02H3/38 ,  H02M1/32 ,  H02J2300/24 ,  H02M7/487

Abstract: A photovoltaic inverter includes a capacitor bridge arm, an inverter bridge arm, and the fault protection apparatus. The capacitor bridge arm includes a positive electrode output port, a negative electrode output port, and a reference output port The inverter bridge arm includes a positive electrode input port, a negative electrode input port, and a reference input port. The positive electrode input port is connected to the positive electrode output port. The negative electrode input port is connected to the negative electrode output port. The reference input port is connected to the reference output port by using the fault protection apparatus. The fault protection apparatus is turned off based on a magnitude value or a variation of a voltage, or a magnitude value or a variation of a current between the reference input port and the positive electrode input port or the negative electrode input port.

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.

Inventor： Zhen Cao ,  Guilei Gu ,  Su Zhou ,  Dong Chen ,  Lei Shi ,  Yanzhong Zhang

IPC: H02S40/32 ,  H02S40/36 ,  H02S40/34

CPC classification number: H02S40/36 ,  H02S40/32 ,  H02S40/34

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.