US 11,056,906 B2
Integrated power supply system
Yu-Ming Chang, Taoyuan (TW); and Sheng-Hua Li, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Jun. 21, 2018, as Appl. No. 16/14,974.
Claims priority of provisional application 62/557,085, filed on Sep. 11, 2017.
Prior Publication US 2019/0081506 A1, Mar. 14, 2019
Int. Cl. H02J 9/06 (2006.01); H02J 3/38 (2006.01); H02J 3/32 (2006.01)
CPC H02J 9/06 (2013.01) [H02J 3/32 (2013.01); H02J 3/382 (2013.01); H02J 9/062 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An integrated power supply system, comprising:
a grid power source;
at least one renewable power source;
a rechargeable battery assembly;
a DC bus;
a bi-directional AC-to-DC converter, coupled to the grid power source and the DC bus;
at least one first DC-to-DC converter, coupled to the at least one renewable power source and the DC bus;
a bi-directional DC-to-DC converter, coupled to the rechargeable battery assembly and the DC bus;
an AC transformer, coupled to the grid power source and configured to transform a voltage level of the grid power source, and the AC transformer having a delta-connected primary side and a wye-connected secondary side coupled to the bi-directional AC-to-DC converter in a single-phase connection; wherein the bi-directional AC-to-DC converter provides an input common connection end and an output neutral point, and the common connection end and the output neutral point are coupled to one phase of the primary side of the AC transformer, and
a controller, configured to control power electricity provided from the grid power source, the at least one renewable power source, and the rechargeable battery assembly feeding into and being drawn from the DC bus, thereby keeping a bus voltage of the DC bus substantially fixed at a system voltage.