公开(公告)号：US20240030830A1

公开(公告)日：2024-01-25

申请号：US18477250

申请日：2023-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： Haitao Chen ,  Zhixiang Hu ,  Xingzhong Zhang ,  Peng Shuai ,  Eckart Hoene

IPC: H02M7/219 ,  H02M3/335 ,  B60L53/22

CPC classification number: H02M7/219 ,  H02M3/33573 ,  B60L53/22 ,  H02J2310/48 ,  H02J9/06

Abstract: The present disclosure refers to an alternating current/direct current (AC/DC) converter for an on board charger (OBC). The AC/DC converter includes a three-phase-input comprising three inputs, a single-stage dual-active bridge (DAB) circuit, and an auxiliary circuit. The auxiliary circuit includes two switching means and an energy storage means, the auxiliary circuit also includes at least two branches, wherein each of the at least two branches include one of the switching means. At least one branch of the at least two branches is connected to a single-phase AC input of the three inputs, and another branch of the at least two branches is connected to an input of the three inputs which is not a single-phase AC input, and the another branch comprises the energy storage means.

公开(公告)号：US11063517B2

公开(公告)日：2021-07-13

申请号：US16750999

申请日：2020-01-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yujian Lin ,  Haitao Chen ,  Yue Chen ,  Zhiqiang Xiang

IPC: H02M1/00 ,  H02M3/158 ,  G06F1/28 ,  H02M3/335

Abstract: A power supply circuit is disclosed. The circuit includes n capacitors, m power branches, and a control chip, where the m power branches include at least one first-type power branch and at least one second-type power branch, the first-type power branch includes a pre-boost topology structure and an open-loop topology structure connected in series to the pre-boost topology structure, the pre-boost topology structure is connected to the control chip, the pre-boost topology structure includes a straight-through state and a closed-loop state, and the control chip is configured to control, based on an output voltage of the power source, the pre-boost topology structure to switch between the straight-through state and the closed-loop state, so that the pre-boost topology structure pre-adjusts the output voltage of the power source and outputs a voltage range that meets a requirement of the open-loop topology structure.