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EP 4 233 142 A1

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(43) Date of publication: 30.08.2023 Bulletin 2023/35 (21) Application number: 20958009.1 (22) Date of filing: 20.10.2020

(51) International Patent Classification (IPC):  H02H 9/00(2006.01) H02M 1/00(2006.01) (52) Cooperative Patent Classification (CPC): H02H 9/002; H02H 9/041; H02M 1/32; H02M 3/155; H02M 1/4208; H02M 1/4225 (86) International application number: PCT/CN2020/122155 (87) International publication number: WO 2022/082426 (28.04.2022 Gazette 2022/17)

(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: Astec International Limited Hong Kong (HK)	(72) Inventors: XIE, Yongtao Shenzhen, Guangdong (CN) CAI, Pengfei Shenzhen, Guangdong (CN) QUE, Wenchao Shenzhen, Guangdong (CN) (74) Representative: Bartholomew, Anna et al Mathisen & Macara LLP Charta House 30-38 Church Street Staines-upon-Thames, Middlesex TW18 4EP Staines-upon-Thames, Middlesex TW18 4EP (GB)