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公开(公告)号：US20240258026A1
公开(公告)日：2024-08-01
申请号：US18630167
申请日：2024-04-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yunyu TANG , Yaojia ZHANG , Lei SHI , Chao LIU
Abstract: A photovoltaic converter and a photovoltaic generation system. The photovoltaic converter is configured to electrically connect to a first photovoltaic module and a second photovoltaic module, where the first photovoltaic module includes a first positive electrode output end and a first negative electrode output end, and the second photovoltaic module includes a second positive electrode output end and a second negative electrode output end. The photovoltaic converter includes a current transformer and a power conversion circuit. The current transformer includes a magnetic structure, a first positive primary side winding, a second positive primary side winding, a negative primary side winding, and a first secondary side winding. The three primary side windings all pass through the magnetic structure and are spaced from each other. The first secondary side winding is wound around the magnetic structure. This reduces an occupied board area.
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公开(公告)号：US20230421074A1
公开(公告)日：2023-12-28
申请号：US18463399
申请日：2023-09-08
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xinyu YU , Xudong WANG , Kai XIN , Lei SHI
Abstract: A three-level neutral point clamped inverter includes four switch units. When an average value of an output current of the three-level neutral point clamped inverter is greater than a first current threshold or less than a second current threshold, only one of the four switch units is controlled to perform a high-frequency operation, to reduce power consumption caused by a high-frequency operation. The average value of the output current is an average value of the output current of the three-level neutral point clamped inverter in a switching cycle. The first current threshold is a positive number, and the second current threshold is a negative number. Power consumption caused by the high-frequency operation of the switch unit in the inverter may be reduced, and electric energy conversion efficiency of the inverter may be improved. A time period in which two switch units perform complementary operations at high frequency is very small.
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3.发明公开公开(公告)号：US20230318434A1
公开(公告)日：2023-10-05
申请号：US18329902
申请日：2023-06-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Fuqiang XU , Jun WANG , Xinyu YU , Kai XIN , Lei SHI
CPC classification number: H02M1/0058 , H02M3/1582 , H02J3/381 , H02J2300/26
Abstract: A conversion circuit, a conversion circuit precharge control method, and a photovoltaic system avoid additional costs and avoid impact on a switch caused by a current generated in a circuit at a moment when an RSCC enters an operating state, thereby ensuring operating performance of the RSCC. The conversion circuit includes a first power supply, a resonant switched capacitor converter (RSCC), and a control circuit. The RSCC includes a switch unit, an output filter unit, a first input end, a second input end, and an output end. The first power supply is configured to supply an input voltage to the RSCC. The control circuit is configured to: before controlling the RSCC to operate, control the switch unit in the RSCC to transmit, to the output filter unit, electric energy supplied by the first power supply.
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公开(公告)号：US20230208312A1
公开(公告)日：2023-06-29
申请号：US18175583
申请日：2023-02-28
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yongbing GAO , Yunyu TANG , Lei SHI
CPC classification number: H02M7/48 , H02J3/381 , H02M1/32 , H02M1/083 , H02M3/04 , H02S40/32 , H02S40/36 , H02J2300/24
Abstract: A converter includes a power conversion circuit, a switching device, and a controller, and includes N phases, where N is 2 or 3. An input end of the power conversion circuit is connected to a direct current power supply, and the power conversion circuit converts a direct current output by the direct current power supply into an alternating current. The switching device includes at least the following two stages: a first-stage switching device and a second-stage switching device. The first-stage switching device and the second-stage switching device separately include N switches, and the N switches are connected in series to the N phases respectively. An output end of the power conversion circuit is connected to an alternating current power grid through the first-stage switching device and the second-stage switching device that are connected in series.
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公开(公告)号：US20230014195A1
公开(公告)日：2023-01-19
申请号：US17955031
申请日：2022-09-28
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： He ZHOU , Yunyu TANG , Lei SHI
Abstract: An inductor (100) is provided, and includes an inductor winding (10), a housing (20), and a thermally conductive packaging material (30). The inductor winding is disposed in the housing. The thermally conductive packaging material is potted in the housing to fill a gap between the inductor winding and the housing. The thermally conductive packaging material includes a first packaging layer (31) and a second packaging layer (32), and a coefficient of thermal conductivity of the first packaging layer is greater than a coefficient of thermal conductivity of the second packaging layer. The housing includes a heat dissipation wall (21) and a packaging wall (22), and the first packaging layer is closer to the heat dissipation wall than the second packaging layer. Heat generated by the inductor can be dissipated after being transmitted to each surface of the housing through the thermally conductive packaging material.
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Patent Agency Ranking
公开(公告)号：US20220285947A1
公开(公告)日：2022-09-08
申请号：US17686163
申请日：2022-03-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Wanyuan QU , Fangcheng LIU , Lei SHI , Wuhua LI
Abstract: A voltage conversion circuit includes: an inductor, a first switch module, N second switch modules connected in series, N third switch modules connected in series, and N−1 flying capacitors. One terminal of the first switch module is separately connected to one terminal of the N second switch modules connected in series and one terminal of the N third switch modules connected in series. The other terminal of the N third switch modules connected in series is connected to a positive electrode of a high-voltage power supply. The other terminal of the first switch module and the other terminal of the N second switch modules connected in series are connected to a negative electrode of the high-voltage power supply. A low-voltage power supply is connected to the two terminals of the first switch module through the inductor. In embodiments of this application, a higher boost ratio can be implemented.
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公开(公告)号：US20240305218A1
公开(公告)日：2024-09-12
申请号：US18592609
申请日：2024-03-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dong CHEN , Lei SHI , Yunfeng LIU
IPC: H02M7/5387 , H02J9/06 , H02M1/12 , H02M7/483
CPC classification number: H02M7/53871 , H02J9/062 , H02M1/126 , H02M7/483
Abstract: An inverter and an inverter control method. The inverter includes an inverter system and a controller. The inverter system includes an inverter circuit, positive and negative direct current buses, a bus capacitor, and a balancing circuit. The inverter is configured to: when a user connects to an unbalanced load, control the balancing circuit based on different magnitudes of voltage fluctuation generated by the unbalanced load for the bus capacitor, to implement a function of jointly sharing current fluctuation by the bus capacitor and the balancing circuit, and reduce design costs of the bus capacitor and the balancing circuit.
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公开(公告)号：US20230216426A1
公开(公告)日：2023-07-06
申请号：US18180258
申请日：2023-03-08
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: A three-level inverter includes controllable switch components T1 to T6. Each of the controllable switch components includes a parallel connected junction capacitor and an anti-parallel connected diode. A first terminal of T1 is connected to a positive direct current bus, a second terminal of T4 is connected to a negative direct current bus, a second terminal of T1 is connected to first terminals of T2 and T5. A controller is configured to: in a positive half cycle, control T3 to be conducted after T1 is conducted, and control T3 to be disconnected before T1 is conducted next time; and in a negative half cycle, control T2 to be conducted after T4 is conducted, and control T2 to be disconnected before T4 is conducted next time. The three-level inverter can balance voltages of the controllable switch components.
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公开(公告)号：US20220385231A1
公开(公告)日：2022-12-01
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：US20220337176A1
公开(公告)日：2022-10-20
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: H02M7/5387 , H02M1/08 , H02M1/00 , H02M7/483
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.
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