公开(公告)号：US20190089170A1

公开(公告)日：2019-03-21

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

IPC: H02J7/00

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.

公开(公告)号：US20150085541A1

公开(公告)日：2015-03-26

申请号：US14555808

申请日：2014-11-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yanshen HU ,  Grover TORRICO ,  Dianbo FU ,  Yunfeng LIU

IPC: H02M7/5395

CPC classification number: H02M7/5395 ,  H02M1/12 ,  H02M7/487 ,  H02M7/49 ,  H02M2001/0064 ,  H02M2001/007

Abstract: A multi-level inverter includes two N-level inverter units with pulse width modulation waves staggered by a phase of 180 degrees, and N is an integer greater than or equal to 3; a direct current power source module, where an output end thereof is connected to input ends of the two N-level inverter units; a transformer, where the transformer includes a primary side and a secondary side, an inductor of the primary side and an inductor of the secondary side are coupled, and one end of the inductor of the primary side and one end of the inductor of the secondary side are connected to output ends of the two N-level inverter units respectively. The two N-level inverter units are reversely coupled, and the other end of the inductor of the primary side and the other end of the inductor of the secondary side are connected.

Abstract translation: 多电平逆变器包括两个N级反相器单元，其中脉冲宽度调制波以180度相位交错，N为大于或等于3的整数; 直流电源模块，其输出端连接到两个N电平逆变器单元的输入端; 变压器，其中变压器包括初级侧和次级侧，初级侧的电感器和次级侧的电感器被耦合，并且次级侧的电感器的一端和电感器的一端的一端 侧分别连接到两个N电平逆变器单元的输出端。 两个N级逆变器单元反向耦合，并且次级侧的电感器的初级侧的另一端和另一端连接。

公开(公告)号：US20240195440A1

公开(公告)日：2024-06-13

申请号：US18586987

申请日：2024-02-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunfeng LIU ,  Zhiheng GUO ,  Ruixiang MA ,  Xinqian XIE ,  Xinghua SONG

IPC: H04B1/00 ,  H04L5/00 ,  H04L5/14

CPC classification number: H04B1/0067 ,  H04L5/0094 ,  H04L5/1461

Abstract: This application discloses a communication method and a communication apparatus. The method includes: A terminal device receives first indication information from a network device, where the first indication information indicates a first time interval. The first time interval is an interval between an end time point of a first signal and a start time point of a second signal. The terminal device receives or sends the second signal at least after the first time interval elapses after the first signal. The first signal and the second signal are sent in a same BWP. A first filter parameter corresponding to the first signal is different from a second filter parameter corresponding to the second signal. The first time interval is related to switching duration of the terminal device.

公开(公告)号：US20240072985A1

公开(公告)日：2024-02-29

申请号：US18504960

申请日：2023-11-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunfeng LIU ,  Zhiheng GUO ,  Xinqian XIE

IPC: H04L5/00

CPC classification number: H04L5/0098

Abstract: A terminal device receives first information from a network device, wherein the first information indicates a plurality of activated serving cells configured by the network device for the terminal device. The plurality of activated serving cells are located in at least two different frequency bands. The terminal device determines, among the plurality of activated serving cells, a reference cell in each of the at least two frequency bands corresponding to the plurality of activated serving cells. The terminal device determines a transmission direction of the terminal device in each of the plurality of activated serving cells. In the frequency band, transmission directions of the terminal device in the reference cell and another cell are the same, and the another cell is an activated serving cell other than the reference cell in the frequency band.

公开(公告)号：US20210098993A1

公开(公告)日：2021-04-01

申请号：US17247379

申请日：2020-12-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Rongliang SHI ,  Kai XIN ,  Yunfeng LIU

IPC: H02J3/38 ,  H02M1/00

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.

公开(公告)号：US20200328697A1

公开(公告)日：2020-10-15

申请号：US16911600

申请日：2020-06-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fangcheng LIU ,  Kai XIN ,  Yunfeng LIU

IPC: H02M7/49 ,  H02S40/32

Abstract: A control method and apparatus for a single-phase five-level converter are provided. The method includes: obtaining a first-phase initial modulated wave and a second-phase initial modulated wave of the single-phase five-level converter; obtaining a first-level modulated wave, a second-level modulated wave, a third-level modulated wave, a fourth-level modulated wave, and a fifth-level modulated wave that are output by the single-phase five-level converter; calculating the first-level modulated wave, the second-level modulated wave, the third-level modulated wave, the fourth-level modulated wave, the fifth-level modulated wave, the first-phase initial modulated wave, and the second-phase initial modulated wave, to obtain a common-mode modulated wave of the single-phase five-level converter; and calculating 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 five-level converter. Implementing the embodiments of this application can increase a system response speed and improve system reliability.