(19)

(11)

EP 2 481 137 A2

(12)

(88) Date of publication A3: 12.05.2011 (43) Date of publication: 01.08.2012 Bulletin 2012/31 (21) Application number: 10760778.0 (22) Date of filing: 13.09.2010

(51) International Patent Classification (IPC):  H02H 7/00(2006.01) (86) International application number: PCT/JP2010/066116 (87) International publication number: WO 2011/037074 (31.03.2011 Gazette 2011/13)

(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 SE SI SK SM TR (30) Priority: 25.09.2009 JP 2009220458 (71) Applicant: Panasonic Electric Works Co., Ltd. Kadoma-shi, Osaka 571-8686 (JP)	(72) Inventors: IMAI, Bungo Kadoma-shi Osaka 571-8686 (JP) KITAMURA, Hiroyasu Kadoma-shi Osaka 571-8686 (JP) YAMASHITA, Mikihiro Kadoma-shi Osaka 571-8686 (JP) (74) Representative: Appelt, Christian W.  Boehmert & Boehmert Pettenkoferstrasse 20-22 80336 München 80336 München (DE)