专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP4391340A1 POWER CONVERSION DEVICE, CONTROL METHOD, AND POWER SUPPLY SYSTEM 审中-实审
公开(公告)号：EP4391340A1
公开(公告)日：2024-06-26
申请号：EP22953407.8
申请日：2022-07-30
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： WANG, Zhaohui , SHI, Lei , GAO, Yongbing
IPC分类号： H02M3/155 , H02M7/537 , H02J3/38
CPC分类号： H02J3/38 , H02M3/155 , H02M7/537
摘要： This application provides a power conversion apparatus, a control method, and a power supply system. The power conversion apparatus includes a first group of input ends, a second group of input ends, a first direct current conversion circuit, a second direct current conversion circuit, a positive direct current bus, a negative direct current bus, a first bus capacitor, a second bus capacitor, a first output end, and a second output end. The first bus capacitor and the second bus capacitor are connected in series between the positive direct current bus and the negative direct current bus, and the positive direct current bus and the negative direct current bus are respectively connected to the first output end and the second output end of the power conversion apparatus. An input end of the first direct current conversion circuit is connected to a first group of first input ends, and an output end of the first direct current conversion circuit is separately connected to two ends of the first bus capacitor. An input end of the second direct current conversion circuit is connected to a second group of second input ends, and an output end of the second direct current conversion circuit is separately connected to two ends of the second bus capacitor. A first group of second input ends are connected to the negative direct current bus, and a second group of first input ends are connected to the positive direct current bus. According to this application, costs of the power conversion apparatus can be reduced.

2. 发明公开

EP4358337A1 GRID-TIED INVERTER APPARATUS AND GRID-TIED CONTROL METHOD 审中-公开
公开(公告)号：EP4358337A1
公开(公告)日：2024-04-24
申请号：EP23204674.8
申请日：2023-10-19
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： TANG, Yunyu , SHI, Lei , ZHANG, Yaojia , CHEN, Dong , XIN, Kai
IPC分类号： H02J3/01 , H02J3/38 , H02M1/12 , H02M7/48
CPC分类号： Y02B70/10 , H02M1/126 , H02J3/01 , H02J3/381 , H02J2300/2020200101 , H02M7/4818
摘要： This application provides a grid-tied inverter apparatus and a grid-tied control method. The inverter apparatus includes an inverter circuit, a controller, and a filter circuit. The controller is configured to adjust switching frequencies of a plurality of power switching transistors based on an output current value of the inverter apparatus, to adjust a resonance frequency of the filter circuit through different resonant branches, so that the resonance frequency meets a grid-tied requirement. In this application, when the switching frequencies of the plurality of power switching transistors in the inverter circuit are reduced due to overload of a power supply system, resonance may be produced through different resonant branches, to adjust the resonance frequency of the filter circuit in a timely manner, so as to ensure that the resonance frequency of the filter circuit meets a requirement for system stability. A response is fast, and a control method is simple, so that system stability and security are improved, and applicability is high.

3. 发明公开

EP4336723A1 PHOTOVOLTAIC POWER GENERATION SYSTEM AND CONVERSION CIRCUIT 审中-实审
公开(公告)号：EP4336723A1
公开(公告)日：2024-03-13
申请号：EP22810162.2
申请日：2022-03-24
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： CHEN, Dong , ZHANG, Yanzhong , GAO, Yongbing , SHI, Lei
IPC分类号： H02M7/42 , H02J3/38 , H02S40/32
摘要： Embodiments of this application provide a photovoltaic power generation system and a conversion circuit. Two groups of photovoltaic arrays are cascaded by using the conversion circuit disposed in the photovoltaic power generation system, to effectively increase an input voltage of a DC/AC conversion circuit. In this way, a cable with an existing diameter specification can improve current transmission in the photovoltaic power generation system, to effectively reduce costs of the photovoltaic power generation system. A voltage to earth at an intermediate node in the conversion circuit is adjusted to a first preset value, so that both an absolute value of a voltage to earth of a first group of photovoltaic arrays and an absolute value of a voltage to earth of a second group of photovoltaic arrays are less than a first threshold. In this way, the photovoltaic power generation system can use a power distribution component with an existing voltage withstanding specification, to further reduce costs of the photovoltaic power generation system.

4. 发明公开

EP4203292A1 THREE-LEVEL INVERTER AND CONTROL METHOD AND SYSTEM 审中-实审
公开(公告)号：EP4203292A1
公开(公告)日：2023-06-28
申请号：EP20952706.8
申请日：2020-09-09
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： XU, Fei , YU, Xinyu , XIN, Kai , ZHOU, Xiaoxiang , SHI, Lei , JU, Peng
IPC分类号： H02M7/487
摘要： This application discloses a three-level inverter, a control method, and a system, and relates to the field of power electronics technologies. The three-level inverter includes controllable switch components T1 to T6. Each of the controllable switch components includes a parallel connected junction capacitor and an anti-parallel connected diode. A first terminal of T1 is connected to a positive direct current bus, a second terminal of T4 is connected to a negative direct current bus, a second terminal of T1 is connected to first terminals of T2 and T5, a first terminal of T4 is connected to second terminals of T3 and T6, a second terminal of T2 and a first terminal of T3 are connected to a direct current bus midpoint, and a second terminal of T5 and a first terminal of T6 are connected to form a bridge arm terminal. A controller is further included. The controller is configured to: in a positive half cycle, control T3 to be conducted after T1 is conducted, and control T3 to be disconnected before T1 is conducted next time; and in a negative half cycle, control T2 to be conducted after T4 is conducted, and control T2 to be disconnected before T4 is conducted next time. The three-level inverter can balance voltages of the controllable switch components.

5. 发明公开

EP4199295A1 ENERGY STORAGE APPARATUS, CONTROL METHOD FOR ENERGY STORAGE APPARATUS, AND PHOTOVOLTAIC SYSTEM 审中-实审
公开(公告)号：EP4199295A1
公开(公告)日：2023-06-21
申请号：EP22831993.5
申请日：2022-06-27
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： YU, Shijiang , WU, Zhipeng , ZHOU, He , SHI, Lei , HU, Yang
IPC分类号： H02J3/38 , H02J3/32
摘要： This application provides an energy storage apparatus, an energy storage apparatus control method, and a photovoltaic system. The energy storage apparatus includes: a plurality of battery clusters, a plurality of conversion units, a start unit, and a controller. The controller includes a plurality of control units. The start unit is configured to: after receiving a start signal, control a control switch in at least one battery cluster to close, to start a control unit corresponding to the battery cluster. The control unit is configured to: determine, based on a state of the control switch in the battery cluster, whether a black start mode is on, where the black start mode is a mode in which power supply to a power grid needs to be restored after the power grid is powered off; and when determining that the black start mode is on, control a DC-DC converter in the corresponding conversion unit to release electric energy stored in a battery pack in the corresponding battery cluster, to energize a direct current bus. According to the energy storage apparatus provided in this application, when a powered device or the power grid is powered off, a black start can be implemented without adding an additional device, thereby reducing costs of the photovoltaic system.

6. 发明公开

EP4120296A1 INDUCTOR AND ELECTRONIC DEVICE 审中-实审
公开(公告)号：EP4120296A1
公开(公告)日：2023-01-18
申请号：EP21778919.7
申请日：2021-03-03
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： ZHOU, He , TANG, Yunyu , SHI, Lei
IPC分类号： H01F27/28 , H01F27/02 , H01F17/04
摘要： An inductor (100) is provided, and includes an inductor winding (10), a housing (20), and a thermally conductive packaging material (30). The inductor winding is disposed in the housing. The thermally conductive packaging material is potted in the housing to fill a gap between the inductor winding and the housing. The thermally conductive packaging material includes a first packaging layer (31) and a second packaging layer (32), and a coefficient of thermal conductivity of the first packaging layer is greater than a coefficient of thermal conductivity of the second packaging layer. The housing includes a heat dissipation wall (21) and a packaging wall (22), and the first packaging layer is closer to the heat dissipation wall than the second packaging layer. Heat generated by the inductor can be dissipated after being transmitted to each surface of the housing through the thermally conductive packaging material. A surface area of the housing is larger than that of the inductor winding. This can increase a surface area for heat exchange between the inductor and the outside, to increase a heat dissipation coefficient. In addition, thermally conductive packaging materials with different coefficients of thermal conductivity are potted at different positions in the housing, to ensure that when the inductor can efficiently dissipate heat, manufacturing costs and a weight of the inductor are reduced.

7. 发明公开

EP4432517A1 POWER SUPPLY END, WIRELESS POWER SUPPLY SYSTEM, POWER SUPPLY METHOD, AND COMPUTER STORAGE MEDIUM 审中-实审
公开(公告)号：EP4432517A1
公开(公告)日：2024-09-18
申请号：EP22906085.0
申请日：2022-10-31
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： QIN, Haijun , WU, Jian , LIU, Weirong , CHENG, Yuan , SHI, Lei
IPC分类号： H02J50/20 , H02J50/50 , H02J50/40
摘要： This application provides a power supply end, a wireless power supply system, a power supply method, and a computer storage medium, to improve wireless power supply efficiency. The power supply end includes a transceiver and a plurality of radiation circuits. The transceiver is configured to: generate a charging signal including an electromagnetic wave of at least one frequency band, and separately provide the charging signal for the plurality of radiation circuits. Each of the plurality of radiation circuits can transmit an electromagnetic wave of one or more target frequency bands. The plurality of radiation circuits include a first radiation circuit and a second radiation circuit. One or more target frequency bands included in an electromagnetic wave transmitted by the first radiation circuit are different from one or more target frequency bands included in an electromagnetic wave transmitted by the second radiation circuit. Each of the plurality of radiation circuits is configured to: filter the charging signal, and if a target electromagnetic wave is filtered out, transmit the target electromagnetic wave, where a frequency band corresponding to the target electromagnetic wave is included in one or more target frequency bands corresponding to an electromagnetic wave that can be transmitted by a corresponding radiation circuit.

8. 发明公开

EP4311063A1 POWER SUPPLY SYSTEM, AND OUTPUT VOLTAGE CONTROL METHOD FOR DIRECT-CURRENT COMBINER BOX 审中-实审
公开(公告)号：EP4311063A1
公开(公告)日：2024-01-24
申请号：EP22778644.9
申请日：2022-03-21
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： CHEN, Dong , GAO, Yongbing , SHI, Lei
IPC分类号： H02J3/38
摘要： This application provides a power supply system and a method for controlling an output voltage of a direct current combiner box. The power supply system includes at least one direct current combiner box and an inverter, output terminals of all direct current combiner boxes in the at least one direct current combiner box are connected in series and/or in parallel and then coupled to an input terminal of the inverter, an input terminal of each direct current combiner box is connected to a direct current power supply, and the direct current combiner box includes a controller, a detection circuit, and a direct current conversion circuit. The direct current conversion circuit performs direct current conversion on an input terminal voltage of the direct current combiner box to obtain an output terminal voltage of the direct current combiner box. The detection circuit detects an output terminal parameter of the direct current combiner box, and sends the output terminal parameter of the direct current combiner box to the controller. The controller controls an output voltage of the direct current conversion circuit based on the output terminal parameter of the direct current combiner box. According to this application, it can be ensured that the direct current combiner box can start and work normally even if it is difficult to communicate with the inverter, thereby improving stability of the power supply system and having high applicability.

9. 发明公开

EP4297226A1 CONTROL METHOD FOR ENERGY STORAGE DEVICE, ENERGY STORAGE DEVICE, AND PHOTOVOLTAIC POWER GENERATION SYSTEM 审中-实审
公开(公告)号：EP4297226A1
公开(公告)日：2023-12-27
申请号：EP21933668.2
申请日：2021-03-30
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： YU, Shijiang , LI, Jianshan , ZHANG, Chunlei , WU, Zhipeng , SHI, Lei
IPC分类号： H02J3/28
摘要： This application discloses a control method of an energy storage apparatus, an energy storage apparatus, and a photovoltaic power generation system, to implement a black start without adding an additional component. The energy storage apparatus includes a plurality of battery modules, a switch unit, a start unit, and an electrical energy output port. The plurality of battery modules are separately connected to the start unit and the switch unit. The plurality of battery modules are configured to: when the start unit receives a start signal, control the switch unit to be turned on. The switch unit is connected to the electrical energy output port. When the switch unit is turned on, electrical energy stored in the plurality of battery modules is output through the electrical energy output port. When the switch unit is turned off, the plurality of battery modules are disconnected from the electrical energy output port.

10. 发明公开

EP4199293A1 POWER CONVERTER, PHOTOVOLTAIC POWER GENERATION SYSTEM, AND METHOD AND APPARATUS 审中-实审
公开(公告)号：EP4199293A1
公开(公告)日：2023-06-21
申请号：EP21863413.7
申请日：2021-07-27
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： GAO, Yongbing , TANG, Yunyu , SHI, Lei
IPC分类号： H02J3/38 , H02J3/32 , H02M7/48 , H02S40/32 , H02M7/72
摘要： This application discloses a power converter, a photovoltaic power generation system, a method, and an apparatus. The converter includes a power conversion circuit, a switching device, and a controller, and includes N phases, where N is 2 or 3. An input end of the power conversion circuit is connected to a direct current power supply, and the power conversion circuit converts a direct current output by the direct current power supply into an alternating current. The switching device includes at least the following two stages: a first-stage switching device and a second-stage switching device. The first-stage switching device and the second-stage switching device separately include N switches, and the N switches are connected in series to the N phases respectively. An output end of the power conversion circuit is connected to an alternating current power grid through the first-stage switching device and the second-stage switching device that are connected in series. The controller is configured to: when the power conversion circuit is connected to the alternating current power grid, first control the N switches in the second-stage switching device to be simultaneously turned on, and then sequentially control the N switches in the first-stage switching device to be turned on one by one. When the converter is connected to the power grid, impulse currents borne by a part of the switching devices can be reduced.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式