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(11)

EP 1 955 432 A1

(12)

(43) Date of publication: 13.08.2008 Bulletin 2008/33 (21) Application number: 06818799.6 (22) Date of filing: 24.11.2006

(51) International Patent Classification (IPC):  H02M 7/5387(2007.01) (86) International application number: PCT/EP2006/011280 (87) International publication number: WO 2007/059985 (31.05.2007 Gazette 2007/22)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 24.11.2005 GB 0523975 (71) Applicant: Bombardier Transportation GmbH 10785 Berlin (DE)	(72) Inventors: BELWON, Waldemar S-722 41 Västeras (SE) ULFSTEDT-MATTSSON, Johan S-723 36 Västeras (SE) (74) Representative: Patentanwälte Bressel und Partner  Radickestrasse 48 12489 Berlin 12489 Berlin (DE)