公开(公告)号：US20230231480A1

公开(公告)日：2023-07-20

申请号：US18186482

申请日：2023-03-20

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhengyan HE ,  Jiebin CHENG ,  Haitao CHEN

IPC: H02M3/158 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/1582 ,  H02M1/322 ,  H02M1/0077

Abstract: A switched-capacitor DC/DC converter, a switching-mode power supply, and a control method. The switched-capacitor DC/DC converter includes a controllable switch and n switched capacitor modules, where the n switched capacitor modules are connected in series to form a voltage conversion branch circuit, and the voltage conversion branch circuit is connected to the controllable switch in series. n is an integer greater than or equal to 1. When the DC/DC converter implements different voltage conversion ratios, n may be different values. The converter can implement voltage step-down or voltage step-up, and does not include a transformer inside.

公开(公告)号：US20240364226A1

公开(公告)日：2024-10-31

申请号：US18765715

申请日：2024-07-08

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhengyan HE

IPC: H02M3/335 ,  H02J3/38 ,  H02M3/00

CPC classification number: H02M3/33573 ,  H02J3/38 ,  H02M3/015 ,  H02M3/33592 ,  H02J2300/24

Abstract: A direct current converter includes a full-bridge inverter, a control module, a transformer, a resonant circuit, and a rectifier module. The full-bridge inverter includes a first switching device, a second switching device, a third switching device, and a fourth switching device. The control module adjusts a duty cycle of the first switching device, the second switching device, the third switching device, or the fourth switching device to a first duty cycle. The control module further controls a working frequency of the direct current converter to be a first working frequency, where an absolute value of a difference between the first working frequency and a resonant frequency of the resonant circuit is less than or equal to a threshold.

公开(公告)号：US20220337145A1

公开(公告)日：2022-10-20

申请号：US17858821

申请日：2022-07-06

Applicant: Huawei Digital Power 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.