公开(公告)号：US20220115956A1

公开(公告)日：2022-04-14

申请号：US17556223

申请日：2021-12-20

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Yunliang TENG ,  Chen WANG ,  Jincheng SHAO

IPC: H02M3/335 ,  H02M1/00

Abstract: A flyback converter and an electronic device are provided. A second end of a first secondary winding in a first secondary winding module of the flyback converter is coupled to a first electrode of a first output capacitor and a first output terminal, a first end is coupled to a cathode of a first diode, and an anode of the first diode is coupled to a second electrode of the first output capacitor. A first electrode of a second output capacitor in a second secondary winding module is coupled to the second electrode of the first output capacitor, a second electrode is coupled to a second output terminal, an anode of a second diode is coupled to a second end of the second secondary winding, a cathode is coupled to the first electrode of the second output capacitor.

公开(公告)号：US20220216690A1

公开(公告)日：2022-07-07

申请号：US17701940

申请日：2022-03-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yongbing GAO ,  Chen WANG ,  Tiansan LIN ,  Yang HU

IPC: H02H7/20 ,  H02J3/38 ,  H02H1/00

Abstract: A photovoltaic power generation system includes an inverter, a controller, and at least two direct current branch circuits. The leakage current detection apparatus is configured to: detect a leakage current of the direct current branch circuit on which the leakage current detection apparatus is located and send the leakage current to the controller. The controller is further configured to: when the photovoltaic power generation system runs and a value of a leakage current of the direct current branch circuit exceeds a preset range, determine that an insulation fault occurs on the direct current branch circuit. The system can determine the direct current branch circuit on which the insulation fault occurs in the photovoltaic power generation system, so that measures are taken in time for the direct current branch circuit on which the insulation fault occurs, to eliminate a potential safety hazard.