公开(公告)号：US20200244161A1

公开(公告)日：2020-07-30

申请号：US16851423

申请日：2020-04-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qinghui HOU ,  Cheng YANG

IPC: H02M3/07 ,  H02M3/158 ,  H02M3/137

Abstract: This application provides a switched-capacitor converter circuit, a charging control system, and a control method. In the switched-capacitor converter circuit, input terminals of N levels of switched-capacitor converter units are sequentially connected in series, and output terminals of the N levels of switched-capacitor converter units are connected in parallel, to obtain a first power supply branch to supply power to a load. In addition, a first capacitor acts as a second power supply branch to supply power to the load, and the first power supply branch and the second power supply branch transmit power in parallel. In comparison with a serial power transmission manner, there are fewer devices on a power transmission path when a parallel power transmission manner is used. Therefore, this can reduce power losses on the transmission path, and improve transmission efficiency of the switched converter circuit.

公开(公告)号：US20240162812A1

公开(公告)日：2024-05-16

申请号：US18282303

申请日：2022-03-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qinghui HOU ,  Chengjun YANG ,  Xialing ZHANG

IPC: H02M3/07 ,  H02J7/00 ,  H02M1/32

CPC classification number: H02M3/07 ,  H02J7/00712 ,  H02M1/32 ,  H02J2207/20

Abstract: This application provides a voltage conversion circuit, which includes: a first switch unit, connected in series between an input end and a first node; a second switch unit, connected in series between the first node and a second node; a first capacitor unit, connected in series between the first node and a third node; a second capacitor unit, connected in series between the second node and a fourth node; a third switch unit, connected in series between the third node and a fifth node; a fourth switch unit, connected in series between the third node and a ground end; a fifth switch unit, connected in series between the fifth node and an output end; a third capacitor unit, connected in series between the fifth node and a sixth node; a sixth switch unit, connected in series between the sixth node and the output end; a seventh to tenth switch units.

公开(公告)号：US20210328520A1

公开(公告)日：2021-10-21

申请号：US17359135

申请日：2021-06-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qinglei WANG ,  Qinghui HOU ,  Chenghao SUN ,  Wei LIU

IPC: H02M3/335 ,  H02M1/00

Abstract: An Active Clamp Flyback (ACF) converter includes a transformer module, a clamping module, and a controller. The controller is configured to: after the transformer module starts secondary side discharging, control the clamping module to start receiving leakage inductance power from the transformer module; and after controlling the clamping module to stop receiving the leakage inductance power from the transformer module, control the clamping module to release the leakage inductance power to the transformer module. The leakage inductance power released by the clamping module to the transformer module is used by the transformer module to restore a soft switching state based on the leakage inductance power. In a process of transferring the leakage inductance power to a clamping capacitor, the clamping module is in an enabled state. This reduces a loss caused by the clamping module to the leakage inductance power, and helps reduce overall loss caused by the ACF converter.