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(11)

EP 2 740 205 A1

(12)

(43) Date of publication: 11.06.2014 Bulletin 2014/24 (21) Application number: 11758423.5 (22) Date of filing: 24.08.2011

(51) International Patent Classification (IPC):  H02M 3/335(2006.01) H02J 3/02(2006.01) (86) International application number: PCT/EP2011/064545 (87) International publication number: WO 2013/017177 (07.02.2013 Gazette 2013/06)

(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 (30) Priority: 01.08.2011 WO PCT/EP2011/063207 (71) Applicant: Alstom Technology Ltd 5400 Baden (CH)	(72) Inventors: TRAINER, David, Reginald Alvaston Derbyshire DE24 0AQ (GB) OKAEME, Nnamdi Stafford Staffordshire ST17 4US (GB) (74) Representative: Ahner, Philippe et al BREVALEX 95 rue d'Amsterdam 75378 Paris Cedex 8 75378 Paris Cedex 8 (FR)