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(11)

EP 4 680 982 A1

(12)

(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 23934373.4 (22) Date of filing: 24.04.2023

(51) International Patent Classification (IPC):  G01R 31/42(2006.01) H02H 3/247(2006.01) G01R 19/165(2006.01) (52) Cooperative Patent Classification (CPC): H02H 3/247; G01R 19/16538; H02H 7/09 (86) International application number: PCT/CN2023/090300 (87) International publication number: WO 2024/221168 (31.10.2024 Gazette 2024/44)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (71) Applicant: Siemens Aktiengesellschaft 80333 München (DE)	(72) Inventors: ZHANG, Jun Ming Nanjing, Jiangsu, 211200 (CN) ZENG, Xing Lan Nanjing, Jiangsu, 211200 (CN) (74) Representative: Isarpatent  Patent- und Rechtsanwälte Partg mbB Friedrichstraße 31 80801 München 80801 München (DE)