公开(公告)号：US09842681B2

公开(公告)日：2017-12-12

申请号：US14652307

申请日：2013-12-09

Applicant: SWCC SHOWA DEVICE TECHNOLOGY CO., LTD.

Inventor： Shirou Hasegawa ,  Masahiro Mori ,  Tatsuya Iijima ,  Kiyoshi Miura ,  Kenji Kamiya ,  Masahiro Ichikawa ,  Hiroto Nozaki

IPC: H01F5/00 ,  H01F27/28 ,  H01F5/02 ,  H01F38/14

CPC classification number: H01F27/2823 ,  H01F5/00 ,  H01F5/02 ,  H01F27/2871 ,  H01F38/14

Abstract: Disclosed is a litz wire coil that is configured by spirally winding a litz wire on one plane by a predetermined number of turns. The litz wire is configured by twisting together a plurality of enameled wires formed by baking an insulating film on a conducting body. Pressure shaping is performed such that the litz wire has a substantially rectangular shape in cross section, and the flatness ratio of the litz wire in cross section (long side/short side) is controlled at 1.10 to 1.60, preferably 1.20 to 1.40, more preferably 1.25 to 1.35.