公开(公告)号：US20220069700A1

公开(公告)日：2022-03-03

申请号：US17516325

申请日：2021-11-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Heping Dai ,  Dianbo Fu ,  Huibin Zhu

IPC: H02M1/42 ,  H02M3/155 ,  H02M7/217

Abstract: A bidirectional power conversion system includes three power conversion ports. A first power conversion port includes a power factor correction device and a primary power conversion network. A second power conversion port includes a plurality of switches and a plurality of diodes, wherein an output voltage of the second power conversion port is regulated through adjusting an output voltage of the power factor correction device as well as through adjusting an operating parameter of the primary power conversion network. A third power conversion port includes a first switch network and a power regulator connected in cascade, wherein the first power conversion port, the second power conversion port and the third power conversion port are magnetically coupled to each other through a transformer.

公开(公告)号：US20210408915A1

公开(公告)日：2021-12-30

申请号：US17473202

申请日：2021-09-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dianbo Fu ,  Heping Dai

IPC: H02M3/335 ,  H02M7/06 ,  H02M1/44 ,  H02M1/42

Abstract: A power conversion system includes a first rectifier and a second rectifier. The first rectifier is configured to operate at a first operating frequency. The first rectifier is configured to be connected with a three-phase power source. A first amount of power flows through the first rectifier from the three-phase power source. The second rectifier is configured to operate at a second operating frequency. The second rectifier is configured to be connected in parallel with the first rectifier, and a second amount of power flows through the second rectifier from the three-phase power source. The second operating frequency is higher than the first operating frequency, and the second amount of power is a fraction of the first amount of power.

公开(公告)号：US10951131B2

公开(公告)日：2021-03-16

申请号：US16719114

申请日：2019-12-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lei Shi ,  Jun Zhang ,  Dianbo Fu

IPC: H02M7/797 ,  H02J3/32 ,  H02J3/38 ,  H02M1/00

Abstract: A switch circuit of a converter includes three switch units. A first switch unit includes a first switch device, a second switch device, a third switch device, and a fourth switch device that are connected in series. A second switch unit includes a fifth switch device and a sixth switch device that are connected in series. A third switch unit includes a seventh switch device and an eighth switch device that are connected in series. When the first switch device and the fifth switch device are switched on, the seventh switch is controlled to be switched on. When the fourth switch device and the sixth switch device are switched on, the eighth switch device is controlled to be switched on, thereby effectively reducing a conduction loss of the converter.