公开(公告)号：US20170301454A1

公开(公告)日：2017-10-19

申请号：US15485855

申请日：2017-04-12

Applicant: HITACHI, LTD.

Inventor： Li LU ,  Kenichi KAWAMURA ,  Hiroshi MIYAO ,  Hiroshi MORITA ,  Satoshi ICHIMURA ,  Jun NUKAGA ,  Shinji FUJITA ,  Kohei YAMAGUCHI ,  Hideki OGATA ,  Masato SUZUKI

IPC: H01F27/28

CPC classification number: H01F27/289 ,  H01F27/2823 ,  H01F27/2871 ,  H01F27/2876 ,  H01F27/323

Abstract: A stationary induction electrical apparatus includes a disc winding having a structure in which a flow path for a cooling medium is provided between coils where a low voltage is generated between shield wires, an L-shaped insulation barrier is provided between coils where a high voltage is generated between the shield wires, a horizontal portion of the L-shaped insulation barrier is provided so as to closely contact an upper surface or a lower surface of the disc coil, a tip end portion in an axial direction of the L-shaped insulation barrier is provided so as to closely contact an inner surface of the disc coil which is adjacent to a pressboard insulation cylinder, and a height of the tip end portion in the axial direction is lower than a thickness of one coil.

公开(公告)号：US20200219646A1

公开(公告)日：2020-07-09

申请号：US16638005

申请日：2018-05-15

Applicant: Hitachi, Ltd.

Inventor： Satoshi ICHIMURA ,  Daigo KOMESU ,  Shinji FUJITA ,  Hiroshi MORITA ,  Li LU

IPC: H01F27/28 ,  H01F27/32 ,  H01F27/36

Abstract: An object of the present invention is to provide a stationary induction electric apparatus that can improve insulating performance with a few additional structures. In the stationary induction electric apparatus comprising: an iron core 1; a low-voltage coil conductor 400 wound on the iron core; an insulator 3 enclosing the low-voltage coil conductor; and a high-voltage coil conductor 2 which is wound on the insulator and to which a voltage is applied from the outside, a first shield conductor 5 wound adjacent to the inner peripheral surface of the insulator, a second shield conductor 4 wound adjacent to the outer peripheral surface of the insulator, one end of the first shield conductor, and one end of the second shield conductor are electrically connected to any region of the high-voltage coil conductor.