(19)

(11)

EP 2 476 186 A1

(12)

(43) Date of publication: 18.07.2012 Bulletin 2012/29 (21) Application number: 09782827.1 (22) Date of filing: 09.09.2009

(51) International Patent Classification (IPC):  H02K 7/116(2006.01) F16H 49/00(2006.01) H02K 7/08(2006.01) B25J 9/10(2006.01) (86) International application number: PCT/EP2009/061702 (87) International publication number: WO 2011/029472 (17.03.2011 Gazette 2011/11)

(84) Designated Contracting States: 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 SE SI SK SM TR (71) Applicant: ABB Research Ltd 8050 Zürich (CH)	(72) Inventors: LUNDBERG, Ivan S-722 46 Västerås (SE) LARSSON, Jan S-Västerås 724 78 (SE) (74) Representative: Johansson Webjörn, Ingmari  ABB AB Intellectual Property Ingenjör Bååths Gata 11 721 83 Västerås 721 83 Västerås (SE)