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公开(公告)号：US12095256B2
公开(公告)日：2024-09-17
申请号：US17589316
申请日：2022-01-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Fangpo Zhang , Jun Wang , Tiansan Lin , Houjian Xu
CPC classification number: H02H7/1213 , H02M1/32 , H02M3/158
Abstract: A fault isolation apparatus includes a controller and a circuit breaker. When the circuit breaker is located on a bus connected to a DC/DC conversion unit, if a voltage collected by a first voltage collection terminal is a negative value, it indicates that input or output of the DC/DC conversion unit is reversely connected. In this case, if the circuit breaker is controlled to be opened, the DC/DC conversion unit can be prevented from being connected in series to other parallel DC/DC conversion units. If a voltage collected by a first voltage collection terminal is low and a current collected by a current collection terminal is large, it indicates that the DC/DC conversion unit is short-circuited. In this case, if the circuit breaker is controlled to be opened, another component connected in series to the DC/DC conversion unit can also be prevented from backfeeding energy to the DC/DC conversion unit.
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公开(公告)号：US11894762B2
公开(公告)日：2024-02-06
申请号：US17670592
申请日：2022-02-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jun Wang , Houjian Xu , Tiansan Lin , Fangpo Zhang
CPC classification number: H02M1/0095 , H02M1/0058 , H02M3/07 , H02M3/158
Abstract: A direct current-direct current conversion circuit includes: an input inductor, a first capacitor, a second capacitor, a flying capacitor, a first switch, a second switch, a first inductor, a first diode, a first buffer circuit, a third switch, a fourth switch, a second inductor, a second diode, and a second buffer circuit. A power supply, the input inductor, the first diode, the second diode, the first capacitor, and the second capacitor are sequentially connected in series. A first terminal of the flying capacitor is connected between the first diode and the second diode. A second terminal of the flying capacitor is connected between the first switch and the third switch, and the second terminal of the flying capacitor is further connected between the second switch and the second inductor.
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公开(公告)号：US11811315B2
公开(公告)日：2023-11-07
申请号：US17350191
申请日：2021-06-17
Applicant: Huawei Digital Power Technologies, Co., Ltd.
Inventor： Yongbing Gao , Jun Wang , Lei Shi
CPC classification number: H02M3/155 , H02H7/1213 , H02M1/44 , H02M7/537 , H04B1/40
Abstract: A direct current (DC)/DC conversion circuit includes an input end, a power circuit, and an output end, a bypass circuit that is a unidirectional conduction circuit, and a switch disposed between the input end and the power circuit, where the input end is configured to be coupled to an external power supply to receive power to the DC/DC conversion circuit. The bypass circuit is coupled between the input end and the power circuit, the bypass circuit is disposed between the switch and the power circuit, and the bypass circuit is coupled to the power circuit in parallel. The switch is configured to be closed when the input end is reversely coupled to the external power supply to enable a current from a positive electrode of the external power supply to flow back to a negative electrode of the external power supply through the bypass circuit and the switch.
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公开(公告)号：US11811217B2
公开(公告)日：2023-11-07
申请号：US17584102
申请日：2022-01-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: A photovoltaic power generation system 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.
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Patent Agency Ranking
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：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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公开(公告)号：US20220158443A1
公开(公告)日：2022-05-19
申请号：US17589316
申请日：2022-01-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Fangpo Zhang , Jun Wang , Tiansan Lin , Houjian Xu
Abstract: A fault isolation apparatus includes a controller and a circuit breaker. When the circuit breaker is located on a bus connected to a DC/DC conversion unit, if a voltage collected by a first voltage collection terminal is a negative value, it indicates that input or output of the DC/DC conversion unit is reversely connected. In this case, if the circuit breaker is controlled to be opened, the DC/DC conversion unit can be prevented from being connected in series to other parallel DC/DC conversion units. If a voltage collected by a first voltage collection terminal is low and a current collected by a current collection terminal is large, it indicates that the DC/DC conversion unit is short-circuited. In this case, if the circuit breaker is controlled to be opened, another component connected in series to the DC/DC conversion unit can also be prevented from backfeeding energy to the DC/DC conversion unit.
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公开(公告)号：US12040707B2
公开(公告)日：2024-07-16
申请号：US17473511
申请日：2021-09-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yongbing Gao , Jun Wang , Lei Shi
IPC: H02M3/158
CPC classification number: H02M3/158
Abstract: This application relates to the field of circuit technologies, and provides a step-up circuit and a step-up circuit control method. The step-up circuit includes a power supply, an inductor, N switch components, N-1 flying capacitors, N flyback diodes, a pre-charge unit, and an output unit. The N switch components are connected in series, a first switch component of the N switch components is connected to a first terminal of the power supply through the inductor, and an Nth switch component is connected to a second terminal of the power supply. At least two switch components of the N switch components have withstand voltage specifications different from each other. Values of voltages withstood by switch components with different withstand voltage specifications during normal operation are also different from each other. N is a positive integer.
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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.
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.
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