公开(公告)号：US20210091653A1

公开(公告)日：2021-03-25

申请号：US17112571

申请日：2020-12-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhengyan HE ,  Jiebin CHENG ,  Qinghai WANG ,  Yuliang LU

IPC: H02M1/00

Abstract: Embodiments of the present invention disclose a power converter and a related system. The power converter includes a controller and a power conversion circuit. The power conversion circuit is configured to convert an input power of an input power supply into an output power of a load, where the input power supply is an external power supply connected to the power converter. The controller is configured to control on/off of the first switch element, to implement connection/disconnection between the input power supply and the inductive element; and control the unidirectional conduction circuit to be turned on before the first switch element is turned on in the power conversion cycle.

公开(公告)号：US20170099005A1

公开(公告)日：2017-04-06

申请号：US15383614

申请日：2016-12-19

Applicant: Huawei Technologies Co., LTD

Inventor： Zhaozheng HOU ,  Xiaodong FAN ,  Jiebin CHENG ,  Zhihua LIU ,  Xuezhen ZHANG

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33546 ,  H02M1/08 ,  H02M3/33584 ,  H02M3/33592 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0016 ,  H02M2001/0025 ,  Y02B70/1475

Abstract: A power source management method and a power source are provided. The method includes: comparing a feedforward control signal with a feedback control signal by using a logic control circuit, outputting the signals after the comparison, and performing matching, to obtain control signals of switching transistors of a full-bridge topology circuit; and adjusting the control signals of the switching transistors of the full-bridge topology circuit by using the logic control circuit, so that operating duty cycles of two bridge arms on a primary side match, are symmetric within one switch period of the logic control circuit, or match for a long time, to prevent transformer biasing. The power source management method and the power source can achieve good feedforward performance, suppress input disturbance, and additionally prevent transformer biasing, which ensures that the power source works normally.

公开(公告)号：US20220376607A1

公开(公告)日：2022-11-24

申请号：US17879579

申请日：2022-08-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qiong YE ,  Jiebin CHENG ,  Qinghai WANG ,  Fulong GUO

IPC: H02M1/12 ,  H02M1/44 ,  H02M3/00

Abstract: The converter includes a primary-side winding, a secondary-side winding, a resonant inductor, a resonant capacitor, and a noise suppression network. The primary-side winding and the secondary-side winding form a transformer. The noise suppression network is connected between a primary-side quiescent point and a secondary-side quiescent point. The primary-side quiescent point is a direct current stable potential at an input terminal of the DC/DC converter. The secondary-side quiescent point is a direct current stable potential at an output terminal of the DC/DC converter. A first parasitic capacitance between a first terminal of the primary-side winding and the secondary-side quiescent point is equal to a second parasitic capacitance between a second terminal of the primary-side winding and the secondary-side quiescent point. A suppression current is generated by the noise suppression network, and has a direction opposite to a direction of a total noise current generated by the resonant inductor.

公开(公告)号：US20210304945A1

公开(公告)日：2021-09-30

申请号：US17345023

申请日：2021-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Wei TAN ,  Jiebin CHENG ,  Peng XIAN ,  Qiong YE

IPC: H01F27/24 ,  H02M3/335 ,  H01F27/28 ,  H01F41/06

Abstract: This application relates to the field of electronic technologies, and discloses a transformer and a power supply, to provide a magnetic cylinder distribution structure of a magnetic core while reducing a winding loss by using fractional turn, where the magnetic cylinder distribution structure of the magnetic core is conveniently to implement, thereby reducing product costs. The transformer includes a magnetic core, where the magnetic core includes a first magnetic cylinder and a second magnetic cylinder. One end of the first magnetic cylinder is coupled to one end of the second magnetic cylinder and the other end of the first magnetic cylinder is coupled to the other end of the second magnetic cylinder, to form an annulus.