US 12,034,379 B2
Power conversion system
Hajime Urai, Tokyo (JP); Hiroshi Kamizuma, Tokyo (JP); Kimihisa Furukawa, Tokyo (JP); Noriya Nakao, Tokyo (JP); and Kinya Nakatsu, Tokyo (JP)
Assigned to Hitachi, Ltd., Tokyo (JP)
Appl. No. 17/796,847
Filed by Hitachi, Ltd., Tokyo (JP)
PCT Filed Feb. 25, 2021, PCT No. PCT/JP2021/007046
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/177130, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 2020-038483 (JP), filed on Mar. 6, 2020.
Prior Publication US 2023/0056704 A1, Feb. 23, 2023
Int. Cl. H02H 9/04 (2006.01); H01C 7/12 (2006.01); H02H 9/06 (2006.01); H02M 1/32 (2007.01); H02M 7/12 (2006.01); H02M 7/537 (2006.01)
CPC H02M 7/537 (2013.01) [H01C 7/12 (2013.01); H02H 9/041 (2013.01); H02H 9/06 (2013.01); H02M 7/12 (2013.01); H02M 1/32 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A power conversion system that is provided with a plurality of power converter units connected in series comprising:
short-circuiting switches that are provided to input sides and/or output sides of the power converter units and bypass the power converter units; and
overvoltage suppressing elements that are connected in parallel with the short-circuiting switches and in which conducting states are changed by an application of a prescribed voltage.