公开(公告)号：US20240235250A9

公开(公告)日：2024-07-11

申请号：US18489810

申请日：2023-10-18

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Zhou SHU ,  Xiangbiao PENG

IPC: H02J9/06

CPC classification number: H02J9/062

Abstract: Example control methods and apparatus are described. An example control method for an uninterruptible power supply system includes: when a bypass power supply branch supplies power to a load, outputting a first drive signal to a first switch device and outputting a second drive signal to a second switch device; and controlling the first drive signal and the second drive signal to have a phase difference with an input voltage of the bypass power supply branch; or when a load current of the bypass power supply branch is less than a first threshold, outputting an inverter control signal to control an inverter power supply branch to charge an energy storage battery; or when a current of the inverter power supply branch flows back to an input end of the bypass power supply branch, turning off the first switch device and the second switch device via the inverter power supply branch.

公开(公告)号：US20230369959A1

公开(公告)日：2023-11-16

申请号：US18227606

申请日：2023-07-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhou SHU ,  Biao REN

IPC: H02M1/00 ,  H02M1/08 ,  H02M7/06 ,  H02J3/12 ,  H02M3/158 ,  H02M3/06

CPC classification number: H02M1/007 ,  H02M1/08 ,  H02M7/06 ,  H02J3/12 ,  H02M3/158 ,  H02M3/06 ,  H02J2310/48

Abstract: This application provides a solid-state transformer and a bus voltage equalization method for a solid-state transformer. The solid-state transformer may include a plurality of cascaded modules and a bus voltage equalization module. Input terminals of all the cascaded modules are connected in series, and output terminals of all the cascaded modules are connected in parallel, and are used as a parallel output terminal of the solid-state transformer. The bus voltage equalization module is connected in parallel to the parallel output terminal of the solid-state transformer. Each cascaded module may include a bus capacitor (for example, all capacitors connected in series to each other on a direct current bus.

公开(公告)号：US20240136849A1

公开(公告)日：2024-04-25

申请号：US18489810

申请日：2023-10-17

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Zhou SHU ,  Xiangbiao PENG

IPC: H02J9/06

CPC classification number: H02J9/062

Abstract: Example control methods and apparatus are described. An example control method for an uninterruptible power supply system includes: when a bypass power supply branch supplies power to a load, outputting a first drive signal to a first switch device and outputting a second drive signal to a second switch device; and controlling the first drive signal and the second drive signal to have a phase difference with an input voltage of the bypass power supply branch; or when a load current of the bypass power supply branch is less than a first threshold, outputting an inverter control signal to control an inverter power supply branch to charge an energy storage battery; or when a current of the inverter power supply branch flows back to an input end of the bypass power supply branch, turning off the first switch device and the second switch device via the inverter power supply branch.

公开(公告)号：US20230216305A1

公开(公告)日：2023-07-06

申请号：US18184091

申请日：2023-03-15

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhou SHU ,  Xiaofei ZHANG ,  Peng SHUAI

IPC: H02J3/38 ,  H02M3/00 ,  H02J50/10 ,  H02M7/219 ,  B60L53/62 ,  B60L53/12

CPC classification number: H02J3/38 ,  B60L53/12 ,  B60L53/62 ,  H02J50/10 ,  H02M3/01 ,  H02M7/219 ,  H02J2207/20

Abstract: The original Abstract is canceled in favor of the new Abstract presented on the following page.
A power system, related to the field of electronic power. The power system includes a centralized controller and three power modules. Each phase of an alternating current power supply is connected to one power module, and an input end of each power module is connected to one phase of the alternating current power supply. Each power module includes a low voltage controller and at least two power units. Each power unit includes a unit controller. The centralized controller is connected to each low voltage controller by using a bus. The centralized controller sends a control signal to each unit controller by using each low voltage controller, to control the unit controller and/or a power conversion circuit. The power system can implement hot swap of the power module and improve on-site operation reliability.