公开(公告)号：US20210078427A1

公开(公告)日：2021-03-18

申请号：US16899933

申请日：2020-06-12

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Hua LI

IPC: B60L53/50 ,  H02M7/04 ,  B60L53/62 ,  B60L53/67

Abstract: An energy storage device charging system applied to a solid state transformer structure is coupled to a power grid and charges a plurality of energy storage devices, or feeds power back to the power grid from the energy storage devices. The charging system includes a conversion module, a bus path, a charging module, and a control unit. A total power conversion capacity of the conversion module is less than a total charging power capacity of the charging module. The control unit respectively allocates a plurality of demand power capacities of the charging units according to a power conversion upper limit value of the total power conversion capacity.

公开(公告)号：US20200091704A1

公开(公告)日：2020-03-19

申请号：US16180409

申请日：2018-11-05

Applicant: DELTA ELECTRONICS, INC.

Inventor： Wen-Lung HUANG ,  Sheng-Hua LI

IPC: H02H7/12

Abstract: A power conversion system with abnormal energy protection includes a plurality of DC input power sources, a plurality of DC power converters, two output capacitors, and a protection circuit. An input side of each DC power converter is correspondingly coupled to one of the DC input power sources, and output sides of the DC power converters are coupled in parallel to each other to form a DC output bus. Two output capacitors are coupled in series between a positive voltage end and a negative voltage end of the DC output bus. The protection circuit is coupled between the DC input power sources and the two output capacitors. When one of the two output capacitors is abnormal, the protection circuit decouples the DC input power sources from the two output capacitors in a shorted-circuit manner.

公开(公告)号：US20190081506A1

公开(公告)日：2019-03-14

申请号：US16014974

申请日：2018-06-21

Applicant: DELTA ELECTRONICS, INC.

Inventor： Yu-Ming CHANG ,  Sheng-Hua LI

IPC: H02J9/06 ,  H02J3/38 ,  H02J3/32

Abstract: An integrated power supply system includes a grid power source, at least one renewable power source, a rechargeable battery assembly, a DC bus, a bi-directional AC-to-DC converter, at least one first DC-to-DC converter, a bi-directional DC-to-DC converter, and a controller. The bi-directional AC-to-DC converter is coupled to the grid power source and the DC bus. The at least one first DC-to-DC converter is coupled to the at least one renewable power source and the DC bus. The bi-directional DC-to-DC converter is coupled to the rechargeable battery assembly and the DC bus. The controller controls power electricity feeding into and being drawn from the DC bus, thereby keeping a bus voltage of the DC bus substantially fixed at a system voltage.