(19)

(11)

EP 1 609 232 A1

(12)

(43) Date of publication: 28.12.2005 Bulletin 2005/52 (21) Application number: 04720782.4 (22) Date of filing: 15.03.2004

(51) International Patent Classification (IPC)7: H02K 19/38, H02P 21/00 (86) International application number: PCT/SE2004/000374 (87) International publication number: WO 2004/082105 (23.09.2004 Gazette 2004/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 14.03.2003 US 454314 P (71) Applicant: ABB RESEARCH LTD. 8050 Zürich (CH)	(72) Inventors: KJAER, Philip DK-8000 hus C (DK) KJELLQVIST, Tommy S-113 43 Stockholm (SE) (74) Representative: Dahlstrand, Björn  ABB AB Legal & Compliance/Intellectual Property 721 78 Västeras 721 78 Västeras (SE)