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公开(公告)号：US20250167681A1
公开(公告)日：2025-05-22
申请号：US19032051
申请日：2025-01-18
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Lei Shi , Yongbing Gao
Abstract: A power conversion apparatus, wherein two bus capacitors are connected in series between a direct current bus, and the direct current bus is connected to a first output end and a second output end of the power conversion apparatus. An input end of a first direct current conversion circuit is connected to a first group of first input ends, and an output end of a first direct current conversion circuit is connected to two ends of a first bus capacitor. An input end of a second direct current conversion circuit is connected to a second group of second input ends, and an output end of the second direct current conversion circuit is connected to two ends of a second bus capacitor. A first group of second input ends are connected to the direct current bus, and a second group of first input ends are connected to the direct current bus.
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公开(公告)号：US11984819B2
公开(公告)日：2024-05-14
申请号：US17495117
申请日：2021-10-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Lei Shi , Dong Chen
IPC: H02J3/38 , H02M1/12 , H02M1/14 , H02M7/5387
CPC classification number: H02M7/53871 , H02J3/381 , H02M1/123 , H02M1/14 , H02J2300/24
Abstract: A power conversion circuit includes a switching network, a control circuit, a filter circuit, and a direct current side circuit; and the filter circuit includes a first power inductor, a common mode choke, a first differential mode filter capacitor, a first common mode filter capacitor, and a second common mode filter capacitor. The first power inductor includes a first winding and a second winding, and the common mode choke includes a third winding and a fourth winding; a first end of the first winding and a first end of the second winding are separately connected to the switching network, a second end of the first winding and a second end of the second winding are respectively connected to a first end of the third winding and a first end of the fourth winding.
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公开(公告)号：US20230179106A1
公开(公告)日：2023-06-08
申请号：US18063321
申请日：2022-12-08
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jun Wang , Lei Shi , Yunfeng Liu , Zhaohui Wang
IPC: H02M3/335 , H02M1/08 , H03K17/687
CPC classification number: H02M3/33584 , H02M1/08 , H03K17/687
Abstract: A bidirectional direct current converter includes a controller that controls a switching transistor in the bidirectional direct current converter to reduce an inductance of an inductor, thereby reducing a size and costs of the inductor, and further reducing a size and costs of the entire bidirectional direct current converter. The bidirectional direct current converter further includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, and a capacitor. The controller is coupled to the first switching transistor, the second switching transistor, the third switching transistor, and the fourth switching transistor. The controller performs complementary control on the first switching transistor and the third switching transistor, and performs complementary control on the second switching transistor and the fourth switching transistor.
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公开(公告)号：US12003130B2
公开(公告)日：2024-06-04
申请号：US17693092
申请日：2022-03-11
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： He Zhou , Zhaohui Wang , Xun Wang , Yanzhong Zhang
CPC classification number: H02J7/00712 , H02J7/0013 , H02J7/0048 , H02J7/005 , H02J7/00714 , H02M3/04 , H02M7/44 , H02S40/38
Abstract: An energy storage system includes one or more energy storage unit clusters, and the energy storage unit cluster includes at least two energy storage modules connected in series. The energy storage system further includes a first bus, a second bus, and a centralized monitoring system of the energy storage unit cluster, where the second bus is a direct current bus. The energy storage unit cluster is coupled to the first bus by using a first converter. One energy storage module includes one energy storage element group and one DC/DC converter, and the energy storage element group is coupled to the second bus by using the DC/DC converter. The centralized monitoring system is connected to the energy storage unit cluster through a control bus, and is configured to control a DC/DC converter in any energy storage module in the energy storage unit cluster.
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公开(公告)号：US20230231481A1
公开(公告)日：2023-07-20
申请号：US18185976
申请日：2023-03-17
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Jun Wang , Lei Shi
CPC classification number: H02M3/1586 , H02M3/01 , H02M1/0067 , H02J3/38
Abstract: This application discloses a photovoltaic system. The photovoltaic system includes a DC/DC converter, a resonant switched capacitor converter, an inverter, and a controller. An input terminal of the DC/DC converter is connected to a photovoltaic array. A first input terminal of the resonant switched capacitor converter is connected to a positive output terminal of the DC/DC converter, and a second input terminal of the resonant switched capacitor converter is connected to a negative output terminal of the DC/DC converter. A first output terminal of the resonant switched capacitor converter is connected to a neutral wire of the inverter, a second output terminal of the resonant switched capacitor converter is connected to a negative bus of the inverter, and the resonant switched capacitor converter includes at least the following two resonant switched capacitor circuits RSCCs connected in parallel: a first RSCC and a second RSCC.
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Patent Agency Ranking
公开(公告)号：US11641201B2
公开(公告)日：2023-05-02
申请号：US17332510
申请日：2021-05-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Zhaohui Wang , Jun Zhang , Lei Shi
IPC: H03K17/16 , H03K17/06 , H03K17/0812 , H03K17/567 , H03K17/687 , H03K17/0814 , H03K17/74
Abstract: A device includes a first switch and a first diode connected in parallel between a midpoint and a first terminal of the hybrid power device, a second switch and a second diode connected in parallel between the midpoint and a second terminal of the hybrid power device, a third switch coupled between the first terminal and the second terminal, and a third diode connected between the first terminal and the second terminal.
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公开(公告)号：US11489456B2
公开(公告)日：2022-11-01
申请号：US17157155
申请日：2021-01-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Zhaohui Wang , Lei Shi
Abstract: An inverter includes an upper unit comprises a first switch, a second switch and a third switch, wherein during a first half of a cycle of the inverter, the second switch is turned on before and turned off after the third switch, a lower unit comprising a fourth switch, a fifth switch and a sixth switch, wherein during a second half of the cycle of the inverter, the fifth switch is turned on before and turned off after the sixth switch, a flying capacitor connected between the upper unit and the lower unit, and a filter connected to a common node of the upper unit and the lower unit.
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公开(公告)号：US20230170711A1
公开(公告)日：2023-06-01
申请号：US18154784
申请日：2023-01-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , He Zhou , Lei Shi
IPC: H02J7/00
CPC classification number: H02J7/0016 , H02J7/005 , H02J7/0029 , H02J7/0048 , H02J7/00712 , H02J3/32 , H02J2207/20
Abstract: This application provides an energy storage system including at least one energy storage unit cluster and a centralized monitoring system of the energy storage unit cluster. The energy storage unit cluster including at least two energy storage modules. A first energy storage unit cluster includes an energy storage element group and a switch bridge arm, the switch bridge arm including a master control switch and a bypass switch. The energy storage unit cluster is coupled to a direct current (DC) busbar through a DC/DC converter. The centralized monitoring system is connected to the energy storage unit cluster through a control bus and is configured to control the master control switch and the bypass switch of any energy storage module in the energy storage unit cluster to be on or off.
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公开(公告)号：US11606019B2
公开(公告)日：2023-03-14
申请号：US17495112
申请日：2021-10-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dong Chen , Lei Shi , Zhaohui Wang
Abstract: A control circuit includes a detection module configured to detect an operating condition of a semiconductor switching device; a determining module configured to determine a gate allowable voltage of the semiconductor switching device based on the operating condition; and an output module configured to output a control signal to a driving power supply circuit of the semiconductor switching device based on the gate allowable voltage, to control the driving power supply circuit to provide a gate on voltage that is not higher than the gate allowable voltage and that is positively correlated with the gate allowable voltage for the semiconductor switching device. When the operating condition of the semiconductor switching device becomes better, the gate allowable voltage of the semiconductor switching device is increased.
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10.发明授权公开(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
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.
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