公开(公告)号：US12176751B2

公开(公告)日：2024-12-24

申请号：US18158910

申请日：2023-01-24

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhou Shu ,  Chuntao Zhang

IPC: H02J9/06 ,  H02J7/00

Abstract: This application discloses a non-current equalization UPS apparatus, a current distribution method, and a parallel UPS system. The current distribution method may be applied to any UPS apparatus in a parallel UPS system. A current proportion of a first current output by the any UPS apparatus in a total output current of the parallel UPS system is positively related to a capacity proportion of an available battery capacity of a battery string correspondingly connected to the any UPS apparatus in a total available battery capacity of the parallel UPS system. Therefore, a system backup time of the parallel UPS system can be prolonged, and resource utilization of a battery string with a large available battery capacity can be improved.

公开(公告)号：US20230092047A1

公开(公告)日：2023-03-23

申请号：US17946551

申请日：2022-09-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Chuntao Zhang

IPC: H02J7/00 ,  H02M7/48 ,  H02M3/00 ,  H02M3/335 ,  H02J9/06 ,  G01R31/3835

Abstract: An energy storage system includes a plurality of bidirectional power converters and a plurality of windings. The plurality of windings shares a magnetic core. A controller transfers energy of a target battery to the magnetic core using a target bidirectional power converter and a target winding at a same time. A voltage of the target battery is greater than those of some or all batteries other than the target battery. As the battery is charged and discharged, the voltage of the battery changes, and the controller only needs to find a new target battery to continue discharging until voltages of all the batteries are equalized, for example, voltage differences between all the batteries are all within a preset voltage range.

公开(公告)号：US20230053066A1

公开(公告)日：2023-02-16

申请号：US17976579

申请日：2022-10-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhuyong Huang ,  Xiaofei Zhang ,  Chuntao Zhang

IPC: H02M5/458 ,  H02M1/00

Abstract: Embodiments of this application provide an alternating current power supply circuit, a control method for an alternating current power supply circuit. The alternating current power supply circuit includes a rectifier module and an inverter module. The rectifier module includes a first inductor L1, a first branch, a second branch, a third branch, a first capacitor, and a second capacitor, the third branch includes a soft switching cell, the soft switching cell includes a first switching component and a second switching component that are reversely connected in series, and the first branch, the second branch, and the third branch form an I-type three-level topology or a T-type three-level topology. The inverter module includes a second inductor L1, a fourth branch, a fifth branch, a sixth branch, the first capacitor, and the second capacitor, the sixth branch includes the soft switching cell, and the fourth branch, the fifth branch.

公开(公告)号：US20230327575A1

公开(公告)日：2023-10-12

申请号：US18325638

申请日：2023-05-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhengdong Jiang ,  Chuntao Zhang ,  Maoyong Lu

IPC: H02M7/483 ,  H02M1/32

CPC classification number: H02M7/4835 ,  H02M1/325 ,  H02M7/4833

Abstract: A modular multilevel converter (MMC) includes an input conversion module, an output conversion module, a common conversion module, and a common bridge arm. One end of the input conversion module is connected to Vin, the other end of the input conversion module is connected to the common conversion module through the common bridge arm, and the common conversion module is connected to Vin and Vout. One end of the output conversion module is connected to the common conversion module through the common bridge arm, and the other end of the output conversion module is connected to Vout. The input conversion module and the output conversion module share one bus capacitor.