公开(公告)号：US09711274B2

公开(公告)日：2017-07-18

申请号：US14743680

申请日：2015-06-18

申请人： Hitachi, Ltd.

发明人： Taku Oyama ,  Takahide Matsuo ,  Kenichi Kawamura ,  Akira Yamagishi

IPC分类号： H01F27/00 ,  H01F27/24 ,  H01F27/26 ,  H01F27/33 ,  H01F27/245 ,  H01F27/32

CPC分类号： H01F27/33 ,  H01F27/245 ,  H01F27/263 ,  H01F27/324

摘要： The invention provides a stationary induction apparatus excellent in core vibration damping, being capable of realizing reduction in core excitation-noise. The stationary induction apparatus according to the invention includes a core made up of plural of core-legs formed by lamination of electromagnetic steel sheets, and a core-yoke formed by lamination of electromagnetic steel sheets to join the plural core-legs together; a core-tightening clasp for tightening a joint between the core-yoke and the core-legs, in the direction of the lamination of the electromagnetic steel sheets, to be secured, a winding, a tank, and an insulating sheet disposed between the core-tightening clasp and the core-yoke. Further, a concave hollowed-out part or a notched part is provided on the insulating sheet, positioned at a joint between the core-yoke and the core-leg, and a vibration insulator is disposed in the concave hollowed-out part or the notched part.

公开(公告)号：US09953744B2

公开(公告)日：2018-04-24

申请号：US14743362

申请日：2015-06-18

申请人： Hitachi, Ltd.

发明人： Kohhei Aida ,  Hisashi Morooka ,  Kenichi Kawamura ,  Akira Yamagishi

IPC分类号： H01B3/52 ,  H01F27/32 ,  D21H21/16 ,  D21J1/20 ,  D21H19/20 ,  D21H11/20 ,  H01B3/20 ,  D21H25/02

CPC分类号： H01B3/52 ,  D21H11/20 ,  D21H19/20 ,  D21H21/16 ,  D21H25/02 ,  D21J1/20 ,  H01B3/20 ,  H01F27/324 ,  Y10T428/277 ,  Y10T428/31783 ,  Y10T428/31993

摘要： Electrical insulating paper according to an embodiment of the present invention is used while being immersed in electrical insulating oil, and includes a paper base material mainly containing cellulose, an adsorption layer formed on an entire surface of the paper base material by adsorption, and a moisture barrier layer formed by being chemically bonded to the adsorption layer. The moisture barrier layer includes an amphipathic molecule containing both a hydrophobic hydrocarbon group and a hydrophilic functional group in one molecule. The amphipathic molecule is chemically bonded to the adsorption layer via the hydrophilic functional group. The hydrophobic hydrocarbon group covers the surface of the paper base material.

公开(公告)号：US10090095B2

公开(公告)日：2018-10-02

申请号：US15485855

申请日：2017-04-12

申请人： HITACHI, LTD.

发明人： Li Lu ,  Kenichi Kawamura ,  Hiroshi Miyao ,  Hiroshi Morita ,  Satoshi Ichimura ,  Jun Nukaga ,  Shinji Fujita ,  Kohei Yamaguchi ,  Hideki Ogata ,  Masato Suzuki

IPC分类号： H01F27/06 ,  H01F27/12 ,  H01F21/12 ,  H01F27/28 ,  H01F27/32

摘要： 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.