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11.发明公开公开(公告)号：US20240213783A1
公开(公告)日：2024-06-27
申请号：US18393156
申请日：2023-12-21
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Mingxuan Dong , Shuo Wang , Jie Chen , Wenchao Li , Mingquan Zhao , Kai Xin
CPC classification number: H02J3/381 , H02J3/32 , H02J3/46 , H02J2300/24
Abstract: This application provides an inverter, a power grid power supply system, and a method for controlling an excitation inrush current. The controller adjusts the output voltage of the conversion circuit based on a first phase that is of the output voltage of the conversion circuit and that is during reduction of the output voltage, the magnetic flux of the iron core in the transformer, an output voltage that is of the conversion circuit and that is after the output voltage is reduced, and the target voltage value, so as to increase the output voltage of the conversion circuit and keep the magnetic flux of the iron core less than the saturation magnetic flux.
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公开(公告)号：US20240106244A1
公开(公告)日：2024-03-28
申请号：US18526340
申请日：2023-12-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02J3/40 , H02J3/381 , H02M7/493 , H02J2300/24
Abstract: This application discloses a photovoltaic system and a carrier wave signal synchronization method. The photovoltaic system includes a plurality of inverters and a controller. Each inverter in the photovoltaic system inverts a direct current into an alternating current based on a received carrier wave signal, and transmits the alternating current to a power grid. The controller obtains first output currents of the plurality of inverters in an adjustment period, so that the controller can obtain first output current valid values of the plurality of inverters based on the first output currents of the plurality of inverters.
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公开(公告)号：US11897300B2
公开(公告)日：2024-02-13
申请号：US17552285
申请日：2021-12-15
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Fangcheng Liu , Kai Xin , Yunfeng Liu
IPC: B60G17/019 , B60G17/015 , B60G17/016
CPC classification number: B60G17/0152 , B60G17/016 , B60G17/01908 , B60G2400/102 , B60G2500/10
Abstract: This application provides a vehicle and a control method for a vehicle suspension. The vehicle includes a first component, a second component, and a vehicle suspension. The vehicle suspension is located between the first component and the second component. The first component is a component that the vehicle suspension bears, the second component is configured to bear the vehicle suspension and the first component, and the vehicle suspension includes a variable damper connected between the first component and the second component. The variable damper is configured to provide a first force to the first component based on a first acceleration of the first component, to control a displacement of the first component relative to the second component in a height direction of the vehicle. In the embodiments of this application, bumps in a driving process of the vehicle can be effectively reduced, so that vehicle ride comfort is improved.
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公开(公告)号：US11855460B2
公开(公告)日：2023-12-26
申请号：US17503016
申请日：2021-10-15
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02J3/46 , H02J3/381 , H02M1/0054 , H02M7/539 , H02S40/32 , H02J2300/26
Abstract: A photovoltaic inverter is provided, including an inverter circuit, a data sampling module, and a control module. The inverter circuit includes a switch component and an alternating current output terminal. The data sampling module is configured to collect, from the alternating current output terminal, an instantaneous current value at each sampling point moment in target sampling duration and an instantaneous value of each-phase current at a target moment. The control module is configured to: determine a valid current value of the target sampling duration based on the instantaneous current value at each sampling point moment, determine an upper switching frequency limit and a lower switching frequency limit of an Nth switching period based on the valid current value, and determine a target instantaneous current value IN based on the instantaneous value of each-phase current at the target moment.
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公开(公告)号：US20230327453A1
公开(公告)日：2023-10-12
申请号：US18334653
申请日：2023-06-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xinyu Yu , Kai Xin , Yanzhong Zhang , Yongbing Gao
IPC: H02J3/38
CPC classification number: H02J3/38 , H02J2300/24
Abstract: A photovoltaic system includes a controller and two groups of inverters. The two groups of inverters include a positive inverter group and a negative inverter group. The positive inverter group includes at least two inverters: a first inverter and a third inverter. The negative inverter group includes at least two inverters: a second inverter and a fourth inverter. Alternating current output ends of the first inverter and the third inverter are connected in parallel. Direct current input ends of the first inverter and the second inverter are connected in series. Alternating current output ends of the second inverter and the fourth inverter are connected in parallel. Direct current input ends of the third inverter and the fourth inverter are connected in series.
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Patent Agency Ranking
公开(公告)号：US11626834B2
公开(公告)日：2023-04-11
申请号：US17553385
申请日：2021-12-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Fei Xu , Xinyu Yu , Kai Xin , Jianqiang Wang
Abstract: A converter and a power backfeed control method applied to a photovoltaic power generation system are provided. The power backfeed control method includes: controlling, according to a backfeed instruction, the converter to enter a backfeed mode, where in the backfeed mode, the converter can transmit energy of the power grid to a selected photovoltaic string with a corresponding number; determining a backfeed control voltage according to the backfeed instruction, and determining a voltage limit in a process of determining the backfeed control voltage; determining an actual backfeed voltage based on the backfeed control voltage and the voltage limit, where the actual backfeed voltage is a smaller one of the backfeed control voltage and the voltage limit; and controlling the converter to output the actual backfeed voltage to the selected photovoltaic string, to enable the selected photovoltaic string to generate an electroluminescent effect.
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公开(公告)号：US20250158413A1
公开(公告)日：2025-05-15
申请号：US18945940
申请日：2024-11-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zisen QU , Mingquan Zhao , Meiqing Zhang , Kai Xin , Yunfeng Liu
Abstract: A power conversion system including N power conversion units and a control unit, which can control, in a control periodicity, operating modes of one or more target power conversion units in the N power conversion units to be switched between a PR mode and an MPPT mode, and update a reference power based on a maximum power obtained in the MPPT mode, for an operating power of the target power conversion unit obtained in the PR mode to be an updated reference power, and the updated reference power is less than or equal to the maximum power. In addition, the control unit further controls an operating mode of a power conversion unit other than the target power conversion unit in the N power conversion units to remain unchanged, so that the power conversion unit other than the target power conversion unit does not perform mode switching.
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公开(公告)号：US12224707B2
公开(公告)日：2025-02-11
申请号：US18338573
申请日：2023-06-21
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: An input end of each DC-DC conversion circuit in the photovoltaic system is connected to a corresponding photovoltaic string. Output ends of a plurality of DC-DC conversion circuits are connected in parallel to an input end of a DC-AC conversion circuit. A controller performs a partial IV curve scan on each of the DC-DC conversion circuits, and in a scanning process, controls a total input power of the plurality of DC-DC conversion circuits to be consistent with that existing before the scan; and obtains a sum of the maximum input powers of all the DC-DC conversion circuits based on the maximum input power of each of the DC-DC conversion circuits, where a scanned voltage of the partial IV curve scan is less than an open-circuit voltage. The partial IV curve improves scanning efficiency and obtains a maximum input power in a power-limited state, facilitating subsequent power dispatch and control.
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公开(公告)号：US12224682B2
公开(公告)日：2025-02-11
申请号：US18154277
申请日：2023-01-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
IPC: H02M7/538 , H02M1/12 , H02M7/5387 , H02M7/5395
Abstract: A common-mode voltage injection control method and apparatus for an inverter. For the method and apparatus, a common-mode voltage for a DPWM mode is calculated based on three-phase port voltages and an output power command; a common-mode voltage for an MPC modulation mode is calculated based on the direct current bus voltage, the three-phase port voltages, and the output power command; a modulation proportion is determined based on a maximum phase voltage peak value of the three-phase port voltages, the direct current bus voltage, and a power factor of the output power command; and a common-mode injection voltage is generated based on the common-mode voltage for the DPWM mode, the modulation proportion, and the common-mode voltage for the MPC modulation mode.
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公开(公告)号：US12212250B2
公开(公告)日：2025-01-28
申请号：US17867827
申请日：2022-07-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Ji , Kai Xin , Haibin Guo
Abstract: A control method of a three-phase multi-level inverter includes: determining a modulation ratio based on output of the three-phase multi-level inverter, where the modulation ratio indicates a ratio of an amplitude value of a sinusoidal modulation wave in pulse width modulation to an amplitude value of a carrier; generating, based on the modulation ratio and a modulation ratio threshold, a common-mode voltage regulation signal for regulating a common-mode voltage in phase voltages of the three-phase multi-level inverter; adding the common-mode voltage regulation signal and a differential-mode voltage regulation signal for regulating a differential-mode voltage in the phase voltages of the three-phase multi-level inverter to obtain a composite regulation signal, where the composite regulation signal is presented as a modulation wave for discontinuous pulse width modulation (DPWM); and generating, based on the composite regulation signal, drive signals for controlling switches of phases of the three-phase multi-level inverter.
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