公开(公告)号：US20220231499A1

公开(公告)日：2022-07-21

申请号：US17584102

申请日：2022-01-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Dong CHEN ,  Lei SHI ,  Jun WANG

IPC: H02H7/122 ,  H02J3/00 ,  H02H3/38

Abstract: A photovoltaic power generation system includes a capacitor bridge arm, an inverter bridge arm, and the fault protection apparatus. The capacitor bridge arm includes a positive electrode output port, a negative electrode output port, and a reference output port The inverter bridge arm includes a positive electrode input port, a negative electrode input port, and a reference input port. The positive electrode input port is connected to the positive electrode output port. The negative electrode input port is connected to the negative electrode output port. The reference input port is connected to the reference output port by using the fault protection apparatus. The fault protection apparatus is turned off based on a magnitude value or a variation of a voltage, or a magnitude value or a variation of a current between the reference input port and the positive electrode input port or the negative electrode input port.

公开(公告)号：US20220166313A1

公开(公告)日：2022-05-26

申请号：US17670592

申请日：2022-02-14

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jun WANG ,  Houjian XU ,  Tiansan LIN ,  Fangpo ZHANG

IPC: H02M3/07 ,  H02M1/00 ,  H02J3/38

Abstract: A direct current-direct current conversion circuit includes: an input inductor, a first capacitor, a second capacitor, a flying capacitor, a first switch, a second switch, a first inductor, a first diode, a first buffer circuit, a third switch, a fourth switch, a second inductor, a second diode, and a second buffer circuit. A power supply, the input inductor, the first diode, the second diode, the first capacitor, and the second capacitor are sequentially connected in series. A first terminal of the flying capacitor is connected between the first diode and the second diode. A second terminal of the flying capacitor is connected between the first switch and the third switch, and the second terminal of the flying capacitor is further connected between the second switch and the second inductor.

公开(公告)号：US20240291382A1

公开(公告)日：2024-08-29

申请号：US18655778

申请日：2024-05-06

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jun WANG ,  Shaolei CHEN ,  Chuangpeng LI ,  Dongsheng ZHAO ,  Chenglong MA

IPC: H02M1/42 ,  H01F27/24 ,  H01F27/28 ,  H02M7/06

CPC classification number: H02M1/4208 ,  H01F27/24 ,  H01F27/28 ,  H02M7/06

Abstract: An inductor, a power factor correction circuit, and a power supply system. The inductor includes a coil winding and a magnetic core. The magnetic core includes a first outer magnetic core, a second outer magnetic core, and a winding unit. The first outer magnetic core and the second outer magnetic core are disposed opposite to each other in a first direction, the winding unit is disposed between the first outer magnetic core and the second outer magnetic core, and the coil winding is disposed around the winding unit. The winding unit includes a magnetic core middle column and at least two air-gaps distributed in the first direction. The inductor can improve the operating efficiency of the power factor correction circuit and can optimize efficiency of the power supply system in the light load phase.

公开(公告)号：US20230155499A1

公开(公告)日：2023-05-18

申请号：US18156554

申请日：2023-01-19

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jun WANG ,  Lei SHI ,  Yunfeng LIU ,  Zhaohui WANG

IPC: H02M3/156 ,  H02M1/14 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/156 ,  H02M1/14 ,  H02M1/08 ,  H02M1/0095

Abstract: A three-level boost converter and a control method. The three level flying-capacitor boost converter includes: an inductor, a flying capacitor, a controller, a first switching transistor and a second switching transistor as primary power transistors. When a voltage of the flying capacitor is less than or equal to a half of a bus voltage, a first driving signal is sent to the first switching transistor, and a second driving signal is sent to the second switching transistor; or when a voltage of the flying capacitor is greater than a half of a bus voltage, a first driving signal is sent to the second switching transistor, and a second driving signal is sent to the first switching transistor. The bus voltage is an output voltage Vo of the three-level boost converter.

公开(公告)号：US20230318434A1

公开(公告)日：2023-10-05

申请号：US18329902

申请日：2023-06-06

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fuqiang XU ,  Jun WANG ,  Xinyu YU ,  Kai XIN ,  Lei SHI

IPC: H02M1/00 ,  H02M3/158 ,  H02J3/38

CPC classification number: H02M1/0058 ,  H02M3/1582 ,  H02J3/381 ,  H02J2300/26

Abstract: A conversion circuit, a conversion circuit precharge control method, and a photovoltaic system avoid additional costs and avoid impact on a switch caused by a current generated in a circuit at a moment when an RSCC enters an operating state, thereby ensuring operating performance of the RSCC. The conversion circuit includes a first power supply, a resonant switched capacitor converter (RSCC), and a control circuit. The RSCC includes a switch unit, an output filter unit, a first input end, a second input end, and an output end. The first power supply is configured to supply an input voltage to the RSCC. The control circuit is configured to: before controlling the RSCC to operate, control the switch unit in the RSCC to transmit, to the output filter unit, electric energy supplied by the first power supply.

公开(公告)号：US20230318464A1

公开(公告)日：2023-10-05

申请号：US18327286

申请日：2023-06-01

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu YU ,  Jinxiang ZHAN ,  Fuqiang XU ,  Jun WANG ,  Kai XIN

IPC: H02M3/335 ,  H02J3/38 ,  H02M3/00 ,  H02M7/487

CPC classification number: H02M3/33569 ,  H02J3/381 ,  H02M3/015 ,  H02M7/487 ,  H02J2300/24

Abstract: A direct current converter includes a three-level power switching circuit, a resonant circuit, and a controller. An output voltage at an output end of the three-level power switching circuit is used to charge the resonant circuit. The controller is configured to control power switching components in the three-level power switching circuit, so that when the resonant circuit performs charging or discharging at one half of a direct current voltage, one of the power switching components is connected to a current loop of the resonant circuit, and when the resonant circuit performs charging or discharging at the direct current voltage, two of the power switching components are connected to the current loop of the resonant circuit. By using the direct current converter, a voltage borne by the power switching component in the direct current converter during current conversion can be reduced, thereby improving reliability of the direct current converter.