US 12,142,924 B2
Bidirectional DC/AC power conversion system having multiple DC links
Seung-Ki Sul, Seoul (KR); Sanggi Ko, Seoul (KR); and Shenghui Cui, Seoul (KR)
Assigned to Seoul National University R&DB Foundation, Seoul (KR)
Appl. No. 18/271,225
Filed by SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
PCT Filed Nov. 15, 2021, PCT No. PCT/KR2021/016641
§ 371(c)(1), (2) Date Jul. 6, 2023,
PCT Pub. No. WO2023/013824, PCT Pub. Date Feb. 9, 2023.
Claims priority of application No. 10-2021-0102747 (KR), filed on Aug. 4, 2021.
Prior Publication US 2024/0088666 A1, Mar. 14, 2024
Int. Cl. H02J 3/36 (2006.01); H02M 7/483 (2007.01); H02M 7/493 (2007.01); H02M 7/797 (2006.01)
CPC H02J 3/36 (2013.01) [H02M 7/483 (2013.01); H02M 7/493 (2013.01); H02M 7/797 (2013.01)] 16 Claims
OG exemplary drawing
 
1. In a bidirectional direct current (DC)/alternating current (AC) power conversion system having multiple DC links, the bidirectional DC/AC power conversion system comprising:
a main DC link having a positive terminal and a negative terminal;
at least one auxiliary DC link, wherein the at least one auxiliary DC link comprises at least one of a first auxiliary DC link having a positive terminal connected to the positive terminal of the main DC link, and a second auxiliary DC link having a negative terminal connected to the negative terminal of the main DC link;
a plurality of cells connected in series to form one or more legs, wherein each of the plurality of cells comprises a semiconductor-based switching element, and each of the one or more legs is connected in parallel to the main DC link; and
one or more phase terminals formed between an arm including portions of the plurality of cells and an arm including other portions of the plurality of cells in each of the one or more legs, and configured to output a phase current.