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：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.