公开(公告)号：US20220368227A1

公开(公告)日：2022-11-17

申请号：US17872525

申请日：2022-07-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Tao SHI ,  Jixin ZHU

IPC: H02M3/158 ,  H02M7/483

Abstract: This application discloses a boost power conversion circuit, a method, an inverter, an apparatus, and a system. In the conversion circuit, a voltage control circuit is added on a three-level boost. The voltage control circuit can be connected in series in a third closed loop, and the third closed loop is a loop including an inductor, a first switching transistor, a flying capacitor, a second diode, and an input end. The voltage control circuit clamps a voltage of a common point of the first diode and the second diode when a voltage on an input end of the boost power conversion circuit is less than a startup voltage of the boost power conversion circuit. The voltage borne by the second diode is reduced, so that a diode with relatively small voltage stress can be selected.

公开(公告)号：US20230387807A1

公开(公告)日：2023-11-30

申请号：US18229960

申请日：2023-08-03

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yang LIU ,  Jixin ZHU ,  Biao HU

IPC: H02M3/335 ,  B60L53/22

CPC classification number: H02M3/335 ,  B60L53/22 ,  B60L2210/10

Abstract: A charging circuit includes at least two groups of DC/DC converters, at least one group of relay switches, and at least one diode that are mutually coupled. The relay switch is configured to connect the at least two groups of DC/DC converters in series when a first voltage is in a first threshold range. The first voltage is a charging voltage of an electric vehicle. The relay switch is further configured to connect the at least two groups of DC/DC converters in parallel when the first voltage is in a second threshold range. The diode is configured to prevent a current of a storage battery in the electric vehicle from flowing back. In embodiments of this application, a volume of a charging apparatus can be reduced.

公开(公告)号：US20230231488A1

公开(公告)日：2023-07-20

申请号：US18186477

申请日：2023-03-20

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jianfei LIN ,  Jixin ZHU ,  Yu PENG

IPC: H02M7/00 ,  H05K5/02 ,  H02S40/32

CPC classification number: H02M7/003 ,  H05K5/0213 ,  H02S40/32

Abstract: An inverter, a photovoltaic power generation system, and a dehumidification method. The inverter includes a ventilation valve and a pneumatic transmission device. The ventilation valve is installed on a surface of a cabinet compartment of the inverter. A controller and the pneumatic transmission device are located in the cabinet compartment. A breathable film is disposed on the ventilation valve. The pneumatic transmission device blows air in the cabinet compartment toward the breathable film when the following at least one preset condition is met. The at least one preset condition includes at least one of or more of the following cases: the inverter is running, humidity in the cabinet compartment is higher than preset humidity, and a temperature in the cabinet compartment is higher than a preset temperature.