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公开(公告)号：US10381938B2
公开(公告)日：2019-08-13
申请号：US16132048
申请日：2018-09-14
Applicant: Huawei Technologies Co., Ltd.
Abstract: A resonant circuit includes first, second, and third input nodes configured to receive a three phase input power and is formed as a delta circuit including a first leg connected between a first corner node and a second corner node, a second leg connected between the second corner node and a third corner node, and a third leg connected between the third corner node and the first corner node. A first outer resonant device is connected between the first input node and the first corner node, a second outer resonant device connected between the second input node and the second corner node, and a third outer resonant device connected between the third input node and the third corner node. Each leg of the delta circuit includes an inner resonant device connected in series with a corresponding transformer.
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公开(公告)号：US10355687B2
公开(公告)日：2019-07-16
申请号：US15354488
申请日：2016-11-17
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zhen Cao , Yunfeng Liu , Yanzhong Zhang
IPC: G01R19/00 , H03K5/19 , H03K17/567 , H03B28/00 , H03K4/08 , H03K7/08 , G01R31/02 , H03K17/0812 , H03K17/12 , H03K17/16 , H03K17/18 , G01R31/44
Abstract: A wave loss detection circuit includes: an anode of the diode receives a first drive signal, and a cathode of the diode is connected to a first end of the first resistor; a second end of the first resistor is connected to a first end of the first energy storage unit, a first end of the second resistor, and a first input end of the comparison unit; a second end of the first energy storage unit and a second end of the second resistor are connected to a ground level, and a resistance of the first resistor is less than a resistance of the second resistor; a second input end of the comparison unit is configured to receive a threshold voltage, and if a voltage signal received by the first input end is less than the threshold voltage, which indicates that a wave loss occurs in the first drive signal.
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公开(公告)号：US11909217B2
公开(公告)日：2024-02-20
申请号：US17478561
申请日：2021-09-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Xun Wang
CPC classification number: H02J3/46 , H02J3/32 , H02J3/34 , H02J3/381 , H02J7/0016 , H02J7/0047 , H02J2300/24
Abstract: The present disclosure discloses an energy storage system. The energy storage system includes M cell strings, N energy storage converters, first ends of the N energy storage converters are coupled to at least one of the M cell strings, and second ends of the N energy storage converters are configured to connect to a power grid. A first end of a first energy storage converter is coupled to Q cell strings in the M cell strings, and the first energy storage converter includes a DC/AC conversion unit and at least one DC/DC conversion unit. A first DC/DC conversion unit is coupled to at least one of the Q cell strings by using the first end of the first energy storage converter, the first DC/DC conversion unit is coupled to the DC/AC conversion unit, and the DC/AC conversion unit is coupled to the power grid by using a second end of the first energy storage converter. The first DC/DC conversion unit is configured to perform adaptation between a voltage of the DC/AC conversion unit and a voltage of a cell string. Therefore, a cell capacity is fully used, and a waste of the cell capacity is reduced.
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公开(公告)号：US20210126671A1
公开(公告)日：2021-04-29
申请号：US17137915
申请日：2020-12-30
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yongbing Gao , Yanzhong Zhang , Tiansan Lin , Wei Shui , Chen Wang
Abstract: An inverter in a power generation system converts a direct current that is input from a direct-current-side device into an alternating current for power supply. The inverter includes a control apparatus and a communications apparatus. The control apparatus controls the inverter to convert the direct current that is input from the direct-current-side device into an alternating current for power supply. The communications apparatus is coupled to the control apparatus, and sends a networking information request signal used to request networking information to the direct-current-side device in the power generation system through a direct-current power line, where a frequency of the networking information request signal is within a first frequency band. The communications apparatus also receives the networking information from the direct-current-side device; and sends a control signal to the direct-current-side device, where a frequency of the control signal is within a second frequency band.
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公开(公告)号：US20130114321A1
公开(公告)日：2013-05-09
申请号：US13706087
申请日：2012-12-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhong Zhang
IPC: H02M7/44
CPC classification number: H02M7/44 , H02M7/48 , Y10T307/615
Abstract: An inversion method and an inverter, in which a fifth switch tube, a sixth switch tube, a fifth diode, a sixth diode, and a first capacitor are added in the existing inverter circuit including a bridge arm, the fifth switch tube is connected in parallel to the fifth diode, and the sixth switch tube is connected in parallel to the sixth diode; wherein the positive pole of the fifth diode is connected to the negative pole of a direct current source, the negative pole of the fifth diode is connected to a connection circuit between a second inductor and an alternating current source, the positive pole of the sixth diode is connected to the negative pole of the direct current source, and the negative pole of the sixth diode is connected to a connection circuit between a first inductor and the alternating current source.
Abstract translation: 在包括桥臂的现有逆变器电路中添加有第五开关管，第六开关管，第五二极管，第六二极管和第一电容器的反相方法和反相器，第五开关管被连接到 平行于第五二极管，并且第六开关管与第六二极管并联连接; 其中第五二极管的正极连接到直流电源的负极，第五二极管的负极连接到第二电感器和交流电源之间的连接电路，第六二极管的正极 连接到直流电源的负极，第六二极管的负极连接到第一电感器和交流电源之间的连接电路。
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Patent Agency Ranking
公开(公告)号：US11539326B2
公开(公告)日：2022-12-27
申请号：US17359011
申请日：2021-06-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xun Wang , Yanzhong Zhang
Abstract: This application discloses a photovoltaic direct-current breaking apparatus, including a positive connection terminal and a negative connection terminal for connecting a photovoltaic string and a photovoltaic energy converter, a first diode, a first switch, a convector circuit, and an energy absorption circuit, where the first switch, the convector circuit, and the energy absorption circuit are connected in parallel. The convector circuit can effectively avoid arc discharge and ablation generated when the first switch cuts off a direct-current circuit between the photovoltaic string and the photovoltaic energy converter. The first diode can effectively bypass energy stored by an energy storage device in the photovoltaic energy converter, helping reduce required specifications of a semiconductor device in the convector circuit. The energy absorption circuit can also effectively reduce required specifications of the semiconductor device and a varistor.
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公开(公告)号：US11217999B2
公开(公告)日：2022-01-04
申请号：US17113453
申请日：2020-12-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanzhong Zhang , Xun Wang , Roland Huempfner
IPC: H02J3/38
Abstract: Voltage in the photovoltaic power generation system can be increased under a same power conversion condition, to reduce a current in the photovoltaic power generation system, thereby reducing energy consumption and reducing costs of the photovoltaic power generation system. The system includes: a photovoltaic array, a direct current conversion unit, a bus unit, and an inverter unit, where there are one or more photovoltaic arrays; the photovoltaic array is configured to: convert solar energy into electric energy, in other words, generate direct current power, and output a direct current voltage. The bus unit stores direct current electric energy output by the direct current conversion unit or directly stores the direct current electric energy output by the photovoltaic array, to increase a bus voltage in the first bus unit.
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公开(公告)号：US11201549B2
公开(公告)日：2021-12-14
申请号：US16945091
申请日：2020-07-31
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Chunyang Liu , Zheng Ma
Abstract: A related power conversion circuit includes a three-level switch circuit and a resonant circuit, and a control method of the related power conversion circuit includes: controlling all transistors in the three-level switch circuit to be turned off, where a body diode connected in parallel to a transistor S1, a body diode connected in parallel to a transistor Q1, and a body diode connected in parallel to a transistor Q2 are all turned on based on a current freewheeling function of the resonant circuit; controlling the S1 to be turned on, to set up a first working state of the power conversion circuit; and after the first working state lasts for a time length T1, controlling the Q1 and the Q2 to be turned on.
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公开(公告)号：US20210091571A1
公开(公告)日：2021-03-25
申请号：US17113453
申请日：2020-12-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanzhong Zhang , Xun Wang , Roland Huempfner
IPC: H02J3/38
Abstract: Voltage in the photovoltaic power generation system can be increased under a same power conversion condition, to reduce a current in the photovoltaic power generation system, thereby reducing energy consumption and reducing costs of the photovoltaic power generation system. The system includes: a photovoltaic array, a direct current conversion unit, a bus unit, and an inverter unit, where there are one or more photovoltaic arrays; the photovoltaic array is configured to: convert solar energy into electric energy, in other words, generate direct current power, and output a direct current voltage. The bus unit stores direct current electric energy output by the direct current conversion unit or directly stores the direct current electric energy output by the photovoltaic array, to increase a bus voltage in the first bus unit.
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公开(公告)号：US08564973B2
公开(公告)日：2013-10-22
申请号：US13706087
申请日：2012-12-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhong Zhang
IPC: H02M3/335
CPC classification number: H02M7/44 , H02M7/48 , Y10T307/615
Abstract: An inversion method and an inverter, in which a fifth switch tube, a sixth switch tube, a fifth diode, a sixth diode, and a first capacitor are added in the existing inverter circuit including a bridge arm, the fifth switch tube is connected in parallel to the fifth diode, and the sixth switch tube is connected in parallel to the sixth diode; wherein the positive pole of the fifth diode is connected to the negative pole of a direct current source, the negative pole of the fifth diode is connected to a connection circuit between a second inductor and an alternating current source, the positive pole of the sixth diode is connected to the negative pole of the direct current source, and the negative pole of the sixth diode is connected to a connection circuit between a first inductor and the alternating current source.
Abstract translation: 在包括桥臂的现有逆变器电路中添加有第五开关管，第六开关管，第五二极管，第六二极管和第一电容器的反相方法和反相器，第五开关管被连接到 平行于第五二极管，并且第六开关管与第六二极管并联连接; 其中第五二极管的正极连接到直流电源的负极，第五二极管的负极连接到第二电感器和交流电源之间的连接电路，第六二极管的正极 连接到直流电源的负极，第六二极管的负极连接到第一电感器和交流电源之间的连接电路。
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