公开(公告)号：US20250023456A1

公开(公告)日：2025-01-16

申请号：US18899666

申请日：2024-09-27

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Yuan YAO ,  Xinyu YU ,  Kai XIN ,  Zhaoqi CAI

IPC: H02M1/32 ,  H02J3/00 ,  H02J3/38

Abstract: Example power converters and detection methods are described. One example power converter includes a control device, a plurality of wiring terminals, a power conversion circuit, and a plurality of temperature detection devices. The control device is configured to: when an absolute value of a difference between a temperature value of one wiring terminal in the plurality of wiring terminals and a first reference temperature value is greater than or equal to a first temperature difference threshold, output a signal indicating that an abnormality occurs in the plurality of wiring terminals. In this application, a relative change of a temperature of one wiring terminal relative to another wiring terminal can be directly determined based on temperature values of the plurality of wiring terminals, thereby quickly determining, based on a magnitude of the relative change, whether there is an abnormal temperature rise caused by loose connections in the plurality of wiring terminals.

公开(公告)号：US20230116892A1

公开(公告)日：2023-04-13

申请号：US17964121

申请日：2022-10-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu YU ,  Yuan YAO ,  Fuqiang XU ,  Kai XIN

IPC: H02J3/16 ,  H02M7/49 ,  H02M7/493 ,  H02J3/46

Abstract: A power supply system, a converter, and a circulating current suppression method of the converter. The power supply system includes at least two converters that are coupled between a direct current power supply and an alternating current grid. Each converter obtains target output reactive power when an output current of the converter starts to increase from an initial current, obtains a reactive power compensation parameter based on the three-phase output voltages. Further, each converter obtains compensated output reactive power of the converter based on the reactive power compensation parameter and adjusts actual output reactive power of the converter based on the target output reactive power and the compensated output reactive power, so that an absolute value of a difference between common-mode output voltages of any two of the at least two adjusted converters is less than a difference threshold.