(19)

(11)

EP 1 303 900 A1

(12)

(43) Date of publication: 23.04.2003 Bulletin 2003/17 (21) Application number: 01931758.5 (22) Date of filing: 04.05.2001

(51) International Patent Classification (IPC)7: H02K 7/08, D21G 1/02, H02K 21/38 (86) International application number: PCT/FI0100/426 (87) International publication number: WO 0108/6781 (15.11.2001 Gazette 2001/46)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 05.05.2000 FI 20001051 (71) Applicant: ABB RESEARCH LTD. 8050 Zürich (CH)	(72) Inventors: KAJANDER, Vesa FIN-01800 Klaukkala (FI) FRIMAN, Carl-Johan FIN-00100 Helsinki (FI) (74) Representative: Valkeiskangas, Tapio Lassi Paavali  Oy Kolster Ab,Iso Roobertinkatu 23,P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)