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(11)

EP 4 154 384 A1

(12)

(43) Date of publication: 29.03.2023 Bulletin 2023/13 (21) Application number: 20726811.1 (22) Date of filing: 18.05.2020

(51) International Patent Classification (IPC):  H02J 13/00(2006.01) H02M 1/092(2006.01) H02J 3/36(2006.01) (52) Cooperative Patent Classification (CPC): H02J 13/00017; H02J 13/00034; H02J 3/36; H02J 13/00022; Y02E 60/60 (86) International application number: PCT/EP2020/063804 (87) International publication number: WO 2021/233517 (25.11.2021 Gazette 2021/47)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Hitachi Energy Switzerland AG 5400 Baden (CH)	(72) Inventors: LUVISOTTO, Michele 722 19 Västerås (SE) PANG, Zhibo 722 40 Västerås (SE) DAVIDSSON, Mikael 723 56 Västerås (SE) JANSSON, Roger 725 97 Västerås (SE) HALLMANS, Daniel 771 43 Ludvika (SE) ÖHMAN, Jimmy 771 60 Ludvika (SE) SJÖBERG, Christer 771 40 Ludvika (SE) (74) Representative: AWA Sweden AB  Box 45086 104 30 Stockholm 104 30 Stockholm (SE)