公开(公告)号：US20250158397A1

公开(公告)日：2025-05-15

申请号：US19021226

申请日：2025-01-15

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhaohui Wang ,  Lei Shi ,  Yongbing Gao

IPC: H02J3/00 ,  H02J3/38 ,  H02M1/44 ,  H02M3/00 ,  H02M7/00

Abstract: A system includes a power supply, a collector, and a photovoltaic inverter. The photovoltaic inverter includes a controllable switch on a direct current side, an inverter unit, a controllable switch on an alternating current side, a collector configured to obtain a power supply parameter of the photovoltaic power supply system, a first controller, and a second controller. When the power supply parameter of the photovoltaic power supply system is greater than or equal to a power supply parameter threshold, the first turns off the controllable switch on the direct current side to disconnect an electrical connection between a power supply and the inverter unit. When the power supply parameter of the photovoltaic power supply system is greater than or equal to the power supply parameter threshold, the second controller turns off the controllable switch on the alternating current side to disconnect an electrical connection between the inverter unit and a load.

公开(公告)号：US11870346B2

公开(公告)日：2024-01-09

申请号：US17548963

申请日：2021-12-13

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Dong Chen ,  Lei Shi ,  Zhaohui Wang

IPC: H02M3/158 ,  H02M1/32 ,  H02M1/36 ,  H02M3/07

CPC classification number: H02M3/158 ,  H02M1/32 ,  H02M1/36 ,  H02M3/07

Abstract: A DC-DC converter includes: a first capacitor, a second capacitor, a first switch device, a second switch device, a third switch device, a fourth switch device, a flying capacitor, where one end of the flying capacitor is coupled to the first intermediate node, the other end of the flying capacitor is coupled the second intermediate node; and the protective circuit, including a clamping unit and a buffering unit, where when a voltage between the positive end of the bus and the negative end of the bus increases, the clamping unit clamps the first switch device to a voltage of the first capacitor, and clamps the fourth switch device to a voltage of the second capacitor, and the buffering unit reduces a current flowing through the clamping unit and the flying capacitor.