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EP 2 865 057 A1

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(43) Date of publication: 29.04.2015 Bulletin 2015/18 (21) Application number: 12880059.6 (22) Date of filing: 25.06.2012

(51) International Patent Classification (IPC):  H02B 11/24(2006.01) H02B 1/14(2006.01) (86) International application number: PCT/CN2012/077446 (87) International publication number: WO 2014/000145 (03.01.2014 Gazette 2014/01)

(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 (71) Applicant: ABB Technology Ltd. 8050 Zürich (CH)	(72) Inventors: ZHANG, Yang Xiamen Fujian 361006 (CN) HUANG, Liqun Xiamen Fujian 361006 (CN) YAN, Congming Xiamen Fujian 361112 (CN) (74) Representative: Zimmermann & Partner Patentanwälte mbB  Postfach 330 920 80069 München 80069 München (DE)