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公开(公告)号：US09787217B2
公开(公告)日：2017-10-10
申请号：US14542302
申请日：2014-11-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanshen Hu , Yunfeng Liu , Lei Shi
Abstract: A power converter, includes a first terminal and a second terminal which are connected to a direct current; a third terminal connected to an alternating current; N multi-level bridge arms connected in parallel to the first terminal and the second terminal, where the N multi-level bridge arms work in a parallel-interleaved manner, each multi-level bridge arm of the N multi-level bridge arms includes an alternating current node, and multiple time-varying levels are generated at the alternating current node, where the multiple levels are more than two levels; and a coupling inductor, including N windings coupled by one common magnetic core, where one end of each winding of the N windings is connected to an alternating current node of one multi-level bridge arm of the N multi-level bridge arms, and the other end of each winding of the N windings is connected to the third terminal.
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公开(公告)号：US20170222440A1
公开(公告)日：2017-08-03
申请号：US15493370
申请日：2017-04-21
Applicant: Huawei Technologies Co., Ltd.
Inventor： Lei Shi , Fei Ye , Yunfeng Liu
CPC classification number: H02J3/383 , H01L31/02021 , H02M1/084 , H02M3/04 , H02M7/44 , H02M2001/0009 , H02S50/00 , Y02E10/50
Abstract: A photovoltaic system including multiple photovoltaic cell strings, a converter, a controller, and a bus is presented. The multiple photovoltaic cell strings include at least one string group in which parallel-connected photovoltaic cell strings are coupled to one current sensor, where the at least one string group, after being connected in parallel, is coupled to the converter using the bus, the current sensor is configured to detect a total current of each string group, the controller is configured to adjust, when receiving a report from the current sensor that a reverse current exists in a target string group in the at least one string group, a control signal output to the converter, and the converter is configured to decrease, according to an adjusted control signal, a system voltage between the buses to decrease the reverse current in the target string group.
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公开(公告)号：US09479071B2
公开(公告)日：2016-10-25
申请号：US14662708
申请日：2015-03-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Lei Shi , Yunfeng Liu , Yanshen Hu
CPC classification number: H02M3/33569 , H02M1/126 , H02M7/487 , H02M7/49 , H02M7/493 , H02M2001/0064 , H02M2001/0077
Abstract: A multilevel converter includes at least one converting unit, where the converting unit includes N interleaved parallel bridge arms which enable the converting unit to output 2[(M−1×)N]+1 level signals, where N is an integer greater than or equal to 3, M is the number of levels received by the converting unit, and M is an integer greater than or equal to 3; a direct current inputting unit that supplies the direct current to the converting unit; a voltage dividing unit, where an input end of the voltage dividing unit is connected to an output of the direct current inputting unit, and an output end of the voltage dividing unit is connected to an input end of the converting unit; and at least one filtering unit, where the filtering unit is connected to the converting unit to output an alternating current.
Abstract translation: 多电平转换器包括至少一个转换单元，其中转换单元包括N个交错并联桥臂，其使得转换单元能够输出2 [（M-1×）N] +1电平信号，其中N是大于或 等于3，M是转换单元接收的电平数，M是大于或等于3的整数; 直流输入单元，其将直流电流提供给转换单元; 分压单元的输入端连接到直流输入单元的输出端，分压单元的输出端连接到转换单元的输入端;分压单元， 以及至少一个滤波单元，其中滤波单元连接到转换单元以输出交流电。
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公开(公告)号：US20150270789A1
公开(公告)日：2015-09-24
申请号：US14662708
申请日：2015-03-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Lei Shi , Yunfeng Liu , Yanshen Hu
IPC: H02M7/68
CPC classification number: H02M3/33569 , H02M1/126 , H02M7/487 , H02M7/49 , H02M7/493 , H02M2001/0064 , H02M2001/0077
Abstract: A multilevel converter includes at least one converting unit, where the converting unit includes N interleaved parallel bridge arms which enable the converting unit to output 2[(M−1×)N]+1 level signals, where N is an integer greater than or equal to 3, M is the number of levels received by the converting unit, and M is an integer greater than or equal to 3; a direct current inputting unit that supplies the direct current to the converting unit; a voltage dividing unit, where an input end of the voltage dividing unit is connected to an output of the direct current inputting unit, and an output end of the voltage dividing unit is connected to an input end of the converting unit; and at least one filtering unit, where the filtering unit is connected to the converting unit to output an alternating current.
Abstract translation: 多电平转换器包括至少一个转换单元，其中转换单元包括N个交错并联桥臂，其使得转换单元能够输出2 [（M-1×）N] +1电平信号，其中N是大于或 等于3，M是转换单元接收的电平数，M是大于或等于3的整数; 直流输入单元，其将直流电流提供给转换单元; 分压单元的输入端连接到直流输入单元的输出端，分压单元的输出端连接到转换单元的输入端;分压单元， 以及至少一个滤波单元，其中滤波单元连接到转换单元以输出交流电。
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公开(公告)号：US20150170822A1
公开(公告)日：2015-06-18
申请号：US14584940
申请日：2014-12-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fei Ye , Yunfeng Liu , Dianbo Fu
IPC: H01F27/28 , H02M1/15 , H02M7/5387 , H01F27/24 , H01F27/29
CPC classification number: H01F38/023 , H01F2038/026 , H02M7/487 , H02M7/49
Abstract: A coupled inductor and a power converter includes at least two input ends, an output end, a common magnetic core, at least two first windings, and at least two second windings. The common magnetic core includes at least two magnetic cylinders, and the number of the at least two magnetic cylinders corresponds to the number of the at least two input ends; and one first winding and one second winding are twined in parallel on each cylinder among the at least two magnetic cylinders, and the first windings and the second windings on the at least two magnetic cylinders are mutually connected between the at least two input ends and the output end to form mutually coupled inductances and when currents that flow into the at least two input ends are equal, make the first winding and the second winding on each cylinder generate opposite magnetic potentials.
Abstract translation: 耦合电感器和功率转换器包括至少两个输入端，输出端，公共磁芯，至少两个第一绕组和至少两个第二绕组。 普通磁芯包括至少两个磁性圆筒，并且至少两个磁性圆柱体的数量对应于至少两个输入端的数量; 并且一个第一绕组和一个第二绕组在所述至少两个磁性气缸中的每个气缸上并联缠绕，并且所述至少两个磁性气缸上的所述第一绕组和所述第二绕组彼此连接在所述至少两个输入端和 输出端以形成相互耦合的电感，并且当流入至少两个输入端的电流相等时，使得每个气缸上的第一绕组和第二绕组产生相反的磁势。
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Patent Agency Ranking
公开(公告)号：US11961923B2
公开(公告)日：2024-04-16
申请号：US17725310
申请日：2022-04-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Shuo Wang , Kai Xin , Yunfeng Liu
IPC: H01L31/0224 , H01L31/046 , H01L31/054
CPC classification number: H01L31/022425 , H01L31/022466 , H01L31/046 , H01L31/0543
Abstract: A solar cell is provided, including a front electrode, a functional layer, and a back electrode. The front electrode is an electrode on a side of an illuminated surface. The front electrode includes a high-conductivity region and a low-conductivity region that are adjacent to each other, or the back electrode includes a high-conductivity region and a low-conductivity region that are adjacent to each other. The front electrode and/or the back electrode may be designed to be separated by region, and conductivity of one conductive region is designed to be higher than conductivity of the other conductive region. According to the application, a film rectangular resistance loss caused by large-scale non-uniform lateral transfer of a photocurrent is avoided, thereby improving photoelectric conversion efficiency of the cell, and improving the cell comprehensive performance by flexibly selecting materials based on different requirements of different regions in different application scenarios.
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公开(公告)号：US20240274727A1
公开(公告)日：2024-08-15
申请号：US18589434
申请日：2024-02-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Qun Luo , Shuo Wang , Wenming Su , Xiaolian Chen , Kai Xin , Yunfeng Liu
CPC classification number: H01L31/0201 , H01L31/1876
Abstract: A solar cell component includes a first electrode, a second electrode, and a light absorption layer. The first electrode includes a first conductive electrode, and the second electrode includes a second conductive electrode. The light absorption layer is located between the first conductive electrode and the second conductive electrode. The first electrode further includes a first bus electrode connected to a periphery of the first conductive electrode. A sheet resistance of the first bus electrode is less than a sheet resistance of the first conductive electrode, such that a sheet resistance of a peripheral region of the first electrode is less than a sheet resistance of a central region of the first electrode.
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公开(公告)号：US11689026B2
公开(公告)日：2023-06-27
申请号：US17658413
申请日：2022-04-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Rongliang Shi , Kai Xin , Yunfeng Liu
CPC classification number: H02J3/381 , H02M1/00 , H02J2300/26 , H02M1/0009
Abstract: A photovoltaic power system includes a DC/AC inverter circuit, N DC/DC converter circuits that are located at a previous stage of the DC/AC inverter circuit and that are respectively connected to photovoltaic strings, and a controller connected to the DC/AC inverter circuit and the N DC/DC converter circuits. The controller is configured to: perform MPPT control on n DC/DC converter circuits, and perform CPG control on (N−n) DC/DC converter circuits. In the two control manners, a fast and accurate power reserve or limit of a photovoltaic string inverter with any illumination intensity and ambient temperature can be implemented, and fluctuation of a DC bus voltage and AC output power of the photovoltaic string inverter can be eliminated. Control on a virtual synchronous generator of the photovoltaic string inverter is implemented, and a lifespan of the photovoltaic string inverter is prolonged, without a need to add an energy storage element.
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公开(公告)号：US11362527B2
公开(公告)日：2022-06-14
申请号：US16197471
申请日：2018-11-21
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Ce Liu , Xujun Liu , Yanding Liu , Yunfeng Liu , Jinbo Ma
Abstract: A charging method, a terminal, a charger, and a system, includes: obtaining, by a terminal, a charging mode supported by a charger connected to the terminal; when the charging mode supported by the charger includes an open-loop fast charging mode, detecting, by the terminal, whether both the terminal and the charger are in an open loop state; when both the terminal and the charger are in the open loop state, sending, by the terminal, an open-loop fast charging instruction to the charger; and receiving, by the terminal, a voltage and a current that are transmitted by the charger according to the open-loop fast charging instruction, and performing charging in the open-loop fast charging mode. When determining that the charger supports charging in the open-loop fast charging mode, the terminal is adjusted to the open loop state to perform charging, so as to shorten a charging time and improve user experience.
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公开(公告)号：US10666159B2
公开(公告)日：2020-05-26
申请号：US16232741
申请日：2018-12-26
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fangcheng Liu , Kai Xin , Yunfeng Liu
IPC: H02M7/487 , H02M1/12 , H03K17/567 , H02M7/5395 , H02J3/38 , H02M7/5387
Abstract: A single-phase converter control method and apparatus, includes calculating on a voltage corresponding to a first level output by a single-phase converter, a voltage corresponding to a second level output by the single-phase converter, and a voltage reference value about the voltage corresponding to the first level and the voltage corresponding to the second level to obtain a common-mode modulated-wave change rate of the single-phase converter, where the first level is a direct-current-side positive-bus level, and the second level is a direct-current-side negative-bus level, calculating on a first-phase initial modulated wave of the single-phase converter, a second-phase initial modulated wave of the single-phase converter, and the common-mode modulated-wave change rate to obtain a common-mode modulated wave of the single-phase converter, and calculating on the first-phase initial modulated wave, the second-phase initial modulated wave, and the common-mode modulated wave to obtain a pulse width modulated wave of the single-phase converter.
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