公开(公告)号：US11671015B2

公开(公告)日：2023-06-06

申请号：US17040512

申请日：2019-12-30

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Tengfei Wang ,  Jiacai Zhuang ,  Jun Xu ,  Nianan Pan

IPC: H02M3/158 ,  H02M3/155 ,  H02M1/32

CPC classification number: H02M3/1584 ,  H02M1/322 ,  H02M3/1552

Abstract: A three-level Boost circuit is provided. The three-level Boost circuit includes: an input capacitor, an inductor, a first switch, a second switch, a first freewheeling diode, a second freewheeling diode, a flying capacitor, a balance capacitor, a charging diode, a clamp diode, a discharging diode and an output series capacitor bank. The output series capacitor bank includes multiple output capacitors connected in series, and has a first node and a second node; a potential of the first node is higher than a potential of a cathode of the charging diode, and a potential difference between a cathode of the second freewheeling diode and the second node does not exceed a withstand voltage of the second freewheeling diode.

公开(公告)号：US11515803B2

公开(公告)日：2022-11-29

申请号：US17134443

申请日：2020-12-27

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Shengwei Gong ,  Tengfei Wang ,  Xiaolei Shi ,  Gaozhou Tao

IPC: H02M7/00 ,  C01B3/32 ,  H01H9/00 ,  H02M7/21 ,  H05K7/20

Abstract: An isolated power converter and a hydrogen production system are provided. An electrical connection structure in the isolated power converter includes N secondary winding output bus bars, N rectifier circuit input bus bars, and a positive-negative bus bar, where N is greater than or equal to 1. A secondary winding may include M tapping points, and the secondary winding output bus bar and the rectifier circuit input bus bar that correspond to the secondary winding each include M copper bars that are insulated and stacked. The M tapping points of the secondary winding overlap the M copper bars of the secondary winding output bus bar at input ends of the M copper bars, respectively. The positive-negative bus bar includes two copper bars that are insulated and stacked.

公开(公告)号：US20240405667A1

公开(公告)日：2024-12-05

申请号：US18697710

申请日：2022-04-25

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Hao Wang ,  Tengfei Wang ,  Jiangtao Xu ,  Jun Xu

IPC: H02M1/36 ,  H02J7/06 ,  H02M1/42 ,  H02M3/158

Abstract: An on-board charger, a DCDC converter and a control method are provided. The on-board charger includes a power factor corrector, a high-voltage direct-current converter, a low-voltage direct-current converter, and a controller. An input terminal of the high-voltage direct-current converter is connected to an output terminal of the power factor corrector. An input terminal of the low-voltage direct-current converter is connected to an output terminal of the high-voltage direct-current converter or the output terminal of the power factor corrector. An output terminal of the low-voltage direct-current converter is connected to a low-voltage battery and a low-voltage load. The low-voltage direct-current converter includes a main power transistor and a controllable switching transistor.