公开(公告)号：US11994893B2

公开(公告)日：2024-05-28

申请号：US17696596

申请日：2022-03-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Guilei Gu ,  Zhiwu Xu ,  Yu Wang

IPC: G05F1/67 ,  H02S40/32

CPC classification number: G05F1/67 ,  H02S40/32

Abstract: This application relates to a converter in a photovoltaic power generation system and a converter control method. An input end of the converter is connected to at least one photovoltaic module, and an output end is connected to an inverter. The control method includes: determining an output power-voltage (PV) curve of a converter based on an output PV curve of the photovoltaic module; and controlling a voltage output of the converter based on the output PV curve of the converter. The output PV curve includes at least a simulated voltage limiting section and a constant power section that are connected. In this application, an existing MPPT control policy of the inverter can be adapted when a voltage-limited output is implemented, to avoid a case in which a power of a photovoltaic string drops to zero.

公开(公告)号：US12301082B2

公开(公告)日：2025-05-13

申请号：US17944424

申请日：2022-09-14

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Qiqi Guo ,  Yu Wang ,  Zhao Zhou ,  Yang Zheng

IPC: H02K3/28 ,  H02K3/12

Abstract: A stator includes a stator core and a stator winding. An inner wall of the stator core is provided with M winding slots, the M winding slots are uniformly disposed in a circumferential direction of the inner wall of the stator core. The stator winding includes flat wire conductors inserted in the winding slots, N layers of flat wire conductors are disposed in any one of the winding slots, and phase units of a first-phase winding, phase units of a second-phase winding, and phase units of a third-phase winding are sequentially and periodically arranged along the inner wall of the stator core. Each phase winding includes P parallel branches. Any one of the parallel branches connects flat wire conductors of M·N/3P layers.

公开(公告)号：US20240128816A1

公开(公告)日：2024-04-18

申请号：US18395645

申请日：2023-12-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Bin Lai ,  Yu Wang ,  Zijing Wang ,  Huanwen Huang

IPC: H02K1/276 ,  H02K11/25 ,  H02K21/14

CPC classification number: H02K1/2766 ,  H02K11/25 ,  H02K21/14

Abstract: A variable flux permanent-magnet synchronous motor, a powertrain, and a fan are disclosed, which are applied to the field of motors. The variable flux permanent-magnet synchronous motor includes a stator system 10, a rotor system 20, and a variable magnet system 30. The variable magnet system 30 is located in the stator system 10 or the rotor system 20. The rotor system 20 includes a first permanent magnet 201. The variable magnet system 30 includes a second permanent magnet 301 and a heating apparatus 302. Coercive force of the second permanent magnet 301 is lower than coercive force of the first permanent magnet 201. The heating apparatus 302 is configured to heat the second permanent magnet 301, so that the second permanent magnet 301 has variable flux in a magnetic field.