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Patent Agency Ranking
公开(公告)号：US20250158386A1
公开(公告)日：2025-05-15
申请号：US18917734
申请日：2024-10-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yongbing GAO , Xiaoxiang Zhou , Junsong Tang , Zhuang Sun , Wangjie Xie , Yong Xu , Tao Shi , He Zhou
Abstract: A power supply system includes a power conditioning apparatus, a transformer, and a controller. The power conditioning apparatus includes an inverter circuit, at least one grid-connected switch, a voltage-to-ground detector. The inverter circuit is configured to connect to the inverter circuit is configured to connect to the transformer through the at least one grid-connected switch, and the transformer is configured to connect to a power grid. When one grid-connected switch is turned off and turned on, the voltage-to-ground detector detects voltage to grounds of the power conditioning apparatus to obtain a first voltage value and a second voltage value respectively. The controller outputs alarm information for grounding of a neutral wire of the transformer or controls the power conditioning apparatus to stop working when a difference between the second voltage value and the first voltage value falls within a preset voltage range.
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公开(公告)号：US11418114B2
公开(公告)日：2022-08-16
申请号：US16938119
申请日：2020-07-24
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: This application discloses a boost power conversion circuit, a method, an inverter, an apparatus, and a system. In the conversion circuit, a voltage control circuit is added on a three-level boost. The voltage control circuit can be connected in series in a third closed loop, and the third closed loop is a loop including an inductor, a first switching transistor, a flying capacitor, a second diode, and an input end. The voltage control circuit clamps a voltage of a common point of the first diode and the second diode when a voltage on an input end of the boost power conversion circuit is less than a startup voltage of the boost power conversion circuit. The voltage borne by the second diode is reduced, so that a diode with relatively small voltage stress can be selected.
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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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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：US12088200B2
公开(公告)日：2024-09-10
申请号：US17872525
申请日：2022-07-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02M3/158 , H02M7/4837 , H02M1/0095 , H02M1/32 , H02M1/36 , H02M3/07
Abstract: This application discloses a boost power conversion circuit, a method, an inverter, an apparatus, and a system. In the conversion circuit, a voltage control circuit is added on a three-level boost. The voltage control circuit can be connected in series in a third closed loop, and the third closed loop is a loop including an inductor, a first switching transistor, a flying capacitor, a second diode, and an input end. The voltage control circuit clamps a voltage of a common point of the first diode and the second diode when a voltage on an input end of the boost power conversion circuit is less than a startup voltage of the boost power conversion circuit. The voltage borne by the second diode is reduced, so that a diode with relatively small voltage stress can be selected.
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