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公开(公告)号：US20180068785A1
公开(公告)日：2018-03-08
申请号：US15683104
申请日：2017-08-22
Applicant: HITACHI, LTD.
Inventor： Youichirou YAMADA , Akira NISHIMIZU , Yoshio HAMADATE , Akira YAMAGISHI
Abstract: To provide a safe stationary induction electrical apparatus that prevents a fragment coming off a magnetic shield, wound around an iron core leg portion of the stationary induction electrical apparatus, due to vibrations from being released in a tank accommodating the stationary induction electrical apparatus and thus prevents a trouble such as dielectric breakdown. Moreover, to provide a stationary induction electrical apparatus that does not need to be changed in the dimensions of an iron core for securing an insulation distance due to the placement of a magnetic shield and can reduce a compressive force generated in a winding. A magnetic material is provided in the interiors of insulating members whose interiors are hollow and which are provided in the vicinities of upper and lower ends of the winding wound around the iron core leg portion of the stationary induction electrical apparatus.
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2.发明申请EDDY CURRENT TESTING APPARATUS, EDDY CURRENT TESTING PROBE, AND EDDY CURRENT TESTING METHOD 有权EDDY电流测试装置，EDDY电流测试探头和EDDY电流测试方法公开(公告)号：US20140184215A1
公开(公告)日：2014-07-03
申请号：US14079915
申请日：2013-11-14
Applicant: Hitachi, Ltd.
Inventor： Akira NISHIMIZU , Atsushi ISHIHARA , Jun MATSUMOTO , Takayuki KAWANAKA
IPC: G01N27/90
CPC classification number: G01N27/902
Abstract: An eddy current testing apparatus includes: an eddy current testing probe having an eddy current testing coil arranged on a bottom portion of a casing; a pressing mechanism configured to press the eddy current testing probe so that the bottom portion of the eddy current testing probe is placed in contact with a part of an inner wall surface of a slot formed in an object to be inspected; a carriage configured to mount the pressing mechanism and the eddy current testing probe, the carriage traveling in a depth direction of the slot; and an eddy current testing control device configured to control defect detection for the inner wall surface of the slot by acquiring a detected eddy current signal from the eddy current testing coil.
Abstract translation: 涡流检测装置包括：涡流检测探头，其具有布置在壳体的底部上的涡流检测线圈; 按压机构，其构造为按压所述涡流检测用探针，使得所述涡流检测用探针的底部与形成在被检体内的槽的内壁面的一部分接触; 托架，其构造成安装所述按压机构和所述涡流检测探头，所述托架沿所述槽的深度方向行进; 以及涡流检测控制装置，被配置为通过从涡流检测线圈获取检测到的涡流信号来控制槽的内壁表面的缺陷检测。
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公开(公告)号：US20190096562A1
公开(公告)日：2019-03-28
申请号：US16094146
申请日：2016-04-19
Applicant: HITACHI, LTD.
Inventor： Yu YAMADA , Takashi ISHIGAMI , Akira NISHIMIZU , Kouji SASAKI
IPC: H01F27/06 , H01F27/245
Abstract: The present invention is to improve a performance of a transformer having wound iron cores. The transformer having the wound iron cores which have multi-layer band-shape magnetic material, and a coil wound to pass through an inner circumference of the wound iron core, includes a wound iron core holding member that is a member longer than a width of the wound iron core for supporting an upper inner portion of the wound iron core, a coil holding member for supporting a lower outer portion of the coil, a first support structure including an upper beam arranged on an outer circumference of the wound iron core to support the wound iron core holding member, and a lower beam arranged on an outer circumference of the coil to support the coil holding member, and a second support structure including a pair of outer plates arranged on an inner portion of the upper frame and connected to a connection member that is longer than a width obtained by adding a diameter of the wound iron core and a diameter of the coil, and a wound iron core protection structure that is longer than a width of the wound iron core, for covering a portion where the outer circumference of the coil and an inner portion of the wound iron core face each other, and being connected to the outer plates.
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公开(公告)号：US20160268037A1
公开(公告)日：2016-09-15
申请号：US15060654
申请日：2016-03-04
Applicant: Hitachi, Ltd.
Inventor： Akira NISHIMIZU , Naoya MIYAMOTO , Akira YAMAGISHI , Kazuhiro KAMIMURA
CPC classification number: H01F27/303 , H01F27/2871
Abstract: There is provided a stationary induction electric apparatus including a core; a disk winding wound around the core; and a tank having the core and the disk winding inside. The disk winding is configured by stacking a plurality of pancake windings wound to pile in the radius direction of the core and connecting ends of the plurality of pancake windings to each other.
Abstract translation: 提供一种包括芯的静止感应电气设备; 缠绕在芯上的盘绕组; 以及具有芯部和盘绕在其内的罐。 盘绕组通过在芯的半径方向上堆叠缠绕在桩上的多个煎饼绕组和多个薄饼绕组的连接端彼此堆叠而构成。
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公开(公告)号：US20210192710A1
公开(公告)日：2021-06-24
申请号：US16771103
申请日：2018-11-05
Applicant: Hitachi, Ltd.
Inventor： Li LU , Akira NISHIMIZU , Toshiaki ROKUNOHE , Akira YAMAGISHI
Abstract: Provided is an oil leakage detection apparatus by which oil leakage detection is performed even for colorless oil with high detection accuracy and without complicating the apparatus. The oil leakage detection apparatus of the invention includes a distance measurement unit configured to measure a distance to the oil-input machine, an ultraviolet light source configured to irradiate the oil-input machine with ultraviolet light, a color imaging unit configured to capture an image of the oil-input machine irradiated with ultraviolet light, an image processing unit configured to diagnose oil leakage of the oil-input machine based on the distance measured by the distance measurement unit and the captured image of the color imaging unit, and a display unit configured to display a processed image processed by the image processing unit. Further, an oil leakage detection method of the invention includes measuring a distance from an oil-input machine, irradiating the oil-input device with ultraviolet light, capturing an image of the oil-input machine irradiated with ultraviolet light, diagnosing oil leakage of the oil-input machine based on the measured distance and the captured image, and displaying a processed image after the diagnosis processing.
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Patent Agency Ranking
公开(公告)号：US20190122805A1
公开(公告)日：2019-04-25
申请号：US16096957
申请日：2016-04-27
Applicant: Hitachi, Ltd.
Inventor： Naoya MIYAMOTO , Yu YAMADA , Takashi ISHIGAMI , Naoyuki KURITA , Akira NISHIMIZU
Abstract: The invention is directed to a stationary induction electric device that can reduce loss. To this end, the stationary induction electric device is provided with a first iron core block erected and formed in an annular shape, a second iron core block configured to surround the outer periphery of the first iron core block, a winding wound around the first and the second iron core blocks, a first support plate supporting the upper portion of the first iron core block from below, and a second support plate supporting the upper portion of the second iron core block from below, and a curvature radius of a curved portion appearing on the outer periphery of the lower portion of the second iron core block is made larger than a curvature radius of a curved portion appearing on the outer periphery of the upper portion of the second iron core block.
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7.发明申请公开(公告)号：US20180350492A1
公开(公告)日：2018-12-06
申请号：US15777068
申请日：2015-11-18
Applicant: Hitachi, Ltd.
Inventor： Akira NISHIMIZU , Naoyuki KURITA , Chie KOBAYASHI , Hisashi MOROOKA
CPC classification number: H01F27/24
Abstract: Generation of broken pieces of thin magnetic ribbons is reduced with respect to a joint part of an iron core, which is formed by laminating the thin magnetic ribbons, of a stationary induction apparatus. There is provided an iron core joint structure of the stationary induction apparatus characterized such that in a butt joint part of the iron core, which is configured with the laminated thin magnetic ribbons, of the stationary induction apparatus, a first resin penetrated into the laminated magnetic ribbons is applied to each of butt joint surfaces facing each other, and a second resin is further applied to an outer side of the first resin.
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公开(公告)号：US20180233267A1
公开(公告)日：2018-08-16
申请号：US15879055
申请日：2018-01-24
Applicant: Hitachi, Ltd.
Inventor： Chie KOBAYASHI , Akira NISHIMIZU , Naoyuki KURITA , Akira YAMAGISHI
IPC: H01F27/25 , H01F27/26 , H01F27/245
CPC classification number: H01F27/25 , H01F3/10 , H01F27/245 , H01F27/263 , H01F2003/106
Abstract: The invention provides a core for a stationary induction apparatus including an amorphous core formed of an amorphous thin magnetic strip arranged inside the core, a silicon steel sheet core formed of a silicon steel sheet arranged on a side surface of the amorphous core, a wear plate arranged on the outermost peripheral surface of the silicon steel sheet core, an amorphous core frame arranged around the amorphous core including a space between the amorphous core and the silicon steel sheet core, and a support frame which supports and fixes the amorphous core and the silicon steel sheet core via the wear plate.
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公开(公告)号：US20180204668A1
公开(公告)日：2018-07-19
申请号：US15864300
申请日：2018-01-08
Applicant: Hitachi, Ltd.
Inventor： Yasuhiro MATSUDA , Akira YAMAGISHI , Akira NISHIMIZU
Abstract: There is provided a stationary induction apparatus having a tank accommodating a transformer main body therein, in which a vibration suppression steel material is provided in at least a portion in the vicinity of an edge portion on a tank bottom surface. In addition, a portion of the vibration suppression steel material is made attachable and detachable.
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公开(公告)号：US20160247621A1
公开(公告)日：2016-08-25
申请号：US15018945
申请日：2016-02-09
Applicant: Hitachi, Ltd.
Inventor： Yasunori ONO , Akira NISHIMIZU , Naoya MIYAMOTO , Kohei YAMAGUCHI , Akira YAMAGISHI
IPC: H01F27/10
CPC classification number: H01F27/12 , H01F27/322 , H01F27/323
Abstract: A stationary induction electric apparatus includes an iron core having legs of core and yokes of core; windings wound around the legs of core; coolant for cooling the windings; a cylindrical insulation structure that forms a flow of the coolant around the windings; baffle members alternately provided on the inner wall side and the outer wall side of the cylindrical insulation structure; and adjustment members for constricting the flow of the coolant. The adjustment members are provided on the same side of the respective baffle members and on the respective baffle members.
Abstract translation: 固定式感应电气设备包括具有铁心和铁心的铁芯的铁芯; 缠绕在芯的腿上的绕组; 用于冷却绕组的冷却液; 圆柱形绝缘结构，其形成围绕绕组的冷却剂流; 隔板构件交替地设置在圆柱形绝缘结构的内壁侧和外壁侧; 以及用于收缩冷却剂流动的调节构件。 调节构件设置在相应的挡板构件的相同侧和相应的挡板构件上。
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