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1. 发明授权

US10381938B2 Resonant DC-DC converter 有权
公开(公告)号：US10381938B2
公开(公告)日：2019-08-13
申请号：US16132048
申请日：2018-09-14
申请人： Huawei Technologies Co., Ltd.
发明人： Yanzhong Zhang , Fernando Ruiz Gomez , Georgios Tsengenes , Grover Victor Torrico-Bascopé
IPC分类号： H02M3/335 , H02M3/28 , H02M3/337 , H02M1/08 , H02M1/00 , H02M7/48
摘要： 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.

2. 发明授权

US10355687B2 Wave loss detection circuit for drive signal and switching transistor drive circuit 有权
公开(公告)号：US10355687B2
公开(公告)日：2019-07-16
申请号：US15354488
申请日：2016-11-17
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Zhen Cao , Yunfeng Liu , Yanzhong Zhang
IPC分类号： G01R19/00 , H03K5/19 , H03K17/567 , H03B28/00 , H03K4/08 , H03K7/08 , G01R31/02 , H03K17/0812 , H03K17/12 , H03K17/16 , H03K17/18 , G01R31/44
摘要： 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.

3. 发明授权

US11909217B2 Energy storage system and photovoltaic energy storage system 有权
公开(公告)号：US11909217B2
公开(公告)日：2024-02-20
申请号：US17478561
申请日：2021-09-17
申请人： Huawei Technologies Co., Ltd.
发明人： Yanzhong Zhang , Xun Wang
IPC分类号： H02J3/46 , H02J3/32 , H02J7/00 , H02J3/34 , H02J3/38
CPC分类号： H02J3/46 , H02J3/32 , H02J3/34 , H02J3/381 , H02J7/0016 , H02J7/0047 , H02J2300/24
摘要： 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.

4. 发明申请

US20210126671A1 POWER GENERATION SYSTEM AND COMMUNICATIONS APPARATUS USED IN POWER GENERATION SYSTEM 有权
公开(公告)号：US20210126671A1
公开(公告)日：2021-04-29
申请号：US17137915
申请日：2020-12-30
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Yongbing Gao , Yanzhong Zhang , Tiansan Lin , Wei Shui , Chen Wang
IPC分类号： H04B3/06 , H04B3/54
摘要： 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.

5. 发明申请

US20130114321A1 INVERTER TOPOLOGY CIRCUIT, INVERSION METHOD AND INVERTER 有权
标题翻译：逆变器拓扑电路，逆变法和逆变器
公开(公告)号：US20130114321A1
公开(公告)日：2013-05-09
申请号：US13706087
申请日：2012-12-05
申请人： Huawei Technologies Co., Ltd.
发明人： Yanzhong Zhang
IPC分类号： H02M7/44
CPC分类号： H02M7/44 , H02M7/48 , Y10T307/615
摘要： 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.
摘要翻译：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。

6. 发明授权

US11159089B2 Resonant converter, resonant converter control method, and system 有权
公开(公告)号：US11159089B2
公开(公告)日：2021-10-26
申请号：US16911023
申请日：2020-06-24
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Yanzhong Zhang , Zheng Ma , Lei Shi , Dianbo Fu
IPC分类号： H02M3/335 , H02M1/08 , H02M3/00
摘要： A resonant converter includes: an input power supply, a bleeder circuit, a multi-level switching network, a resonant unit, and a transformer. The input power supply is connected to the bleeder circuit, the multi-level switching network is connected to the bleeder circuit, a clamping middle point of the multi-level switching network is connected to a middle point of the bleeder circuit; one end of the resonant unit is connected to the output terminal of the multi-level switching network, and the other end of the resonant unit is connected to one end of a primary side of the transformer; and the multi-level switching network instructs the output terminal of the multi-level switching network to output a square wave voltage with different amplitudes, to serve as an input voltage of the resonant unit, where the input voltage is used to adjust a gain of the resonant converter.

7. 发明授权

US10978957B2 Resonant converter circuit and resonant converter circuit control method 有权
公开(公告)号：US10978957B2
公开(公告)日：2021-04-13
申请号：US16904735
申请日：2020-06-18
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Yanzhong Zhang , Zheng Ma , Boning Huang , Grover Victor Torrico-Bascopé , Dianbo Fu
IPC分类号： H02M3/335 , H02M3/337 , H02M1/08 , H02M7/483 , H02M1/00
摘要： A resonant converter circuit comprises a multi-level inverter circuit placed before a resonant unit, and the multi-level inverter circuit can reduce a voltage to be input to the resonant unit. The reduced input voltage of the resonant unit results in a drop in an output voltage of the entire resonant converter circuit. In this process, the final output voltage is adjusted by adjusting the input voltage of the resonant unit, with no need to substantially adjust a switching frequency of the resonant converter circuit.

8. 发明授权

US11539326B2 Photovoltaic direct-current breaking apparatus 有权
公开(公告)号：US11539326B2
公开(公告)日：2022-12-27
申请号：US17359011
申请日：2021-06-25
申请人： Huawei Technologies Co., Ltd.
发明人： Xun Wang , Yanzhong Zhang
IPC分类号： H02S40/36 , H02H5/06 , H01C10/50 , H02H5/00 , H01H33/59
摘要： 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.

9. 发明授权

US11217999B2 Photovoltaic power generation inverter system 有权
公开(公告)号：US11217999B2
公开(公告)日：2022-01-04
申请号：US17113453
申请日：2020-12-07
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Yanzhong Zhang , Xun Wang , Roland Huempfner
IPC分类号： H02J3/38
摘要： 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.

10. 发明授权

US11201549B2 Control method of power conversion circuit, and related power conversion circuit 有权
公开(公告)号：US11201549B2
公开(公告)日：2021-12-14
申请号：US16945091
申请日：2020-07-31
申请人： Huawei Technologies Co., Ltd.
发明人： Yanzhong Zhang , Chunyang Liu , Zheng Ma
IPC分类号： H02M3/335 , H02M7/483 , H02M1/00 , H02M7/48 , H02M3/00
摘要： 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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