(19)

(11)

EP 2 705 520 A1

(12)

(43) Date of publication: 12.03.2014 Bulletin 2014/11 (21) Application number: 11865240.3 (22) Date of filing: 06.05.2011

(51) International Patent Classification (IPC):  H01F 38/14(2006.01) H02J 17/00(2006.01) (86) International application number: PCT/FI2011/050419 (87) International publication number: WO 2012/152980 (15.11.2012 Gazette 2012/46)

(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 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: TOIVOLA, Timo Tapani FI-20540 Turku (FI) KARI, Juhani Valdemar FI-21420 Lieto (FI) HAUTALA, Juha Oskari FI-21420 Lieto (FI) (74) Representative: Tognetty, Virpi Maria  Nokia Corporation IPR Department Keilalahdentie 4 02150 Espoo 02150 Espoo (FI)