(19)

(11)

EP 0 956 637 A1

(12)

(43) Date of publication: 17.11.1999 Bulletin 1999/46 (21) Application number: 98902365.0 (22) Date of filing: 02.02.1998

(51) International Patent Classification (IPC):  H02K 1/ 16( . ) H02K 3/ 34( . ) H02K 15/ 02( . ) H02K 3/ 12( . ) H02K 3/ 40( . ) H02K 15/ 12( . ) (86) International application number: PCT/SE1998/000168 (87) International publication number: WO 1998/034329 (06.08.1998 Gazette 1998/31)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE Designated Extension States: LT LV RO SI (30) Priority: 03.02.1997 SE 19970000358 28.11.1997 SE 19970004428 (71) Applicant: ABB AB 721 83 Västeras (SE)	(72) Inventors: ROTHMAN, Bengt S-723 36 Väster s (SE) LARSSON, Bertil S-724 76 Väster s (SE) LEIJON, Mats S-723 35 Väster s (SE) (74) Representative: Johansson Webjörn, Ingmari, et al  L.A. Groth & Co KB Patentbyra, P.O. Box 6107 102 32 Stockholm 102 32 Stockholm (SE)