知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.015 秒)

    Switchgear
    2.
    发明申请
    Switchgear 有权
    开关柜

    公开(公告)号：US20150131207A1

    公开(公告)日：2015-05-14

    申请号：US14395287

    申请日：2013-03-27

    申请人： HITACHI, LTD.

    发明人： Hajime Urai ,  Yasuaki Aoyama ,  Hiroaki Hashimoto ,  Tatsuro Kato ,  Ayumu Morita ,  Toshiaki Rokunohe ,  Yoichi Oshita

    IPC分类号： H02B13/035 ,  H01H3/32 ,  H01H3/26 ,  H02B13/075

    CPC分类号： H02B13/035 ,  H01H3/26 ,  H01H3/32 ,  H01H3/52 ,  H01H31/003 ,  H01H33/36 ,  H01H33/42 ,  H01H33/50 ,  H01H2003/268 ,  H01H2223/002 ,  H02B5/01 ,  H02B5/06 ,  H02B13/075 ,  H02K41/031

    摘要： An object is to provide a switchgear having a simple structure. To solve the problem, a switchgear according to the invention is characterized by having a fixed side electrode 3, a movable side electrode 4 configured to come into contact with or separate from the fixed side electrode 3, and an operating mechanism configured to allow drive force for movement of the movable side electrode 4 to be generated, wherein the operating mechanism for operating the movable side electrode 4 includes one operating mechanism, and the one operating mechanism allows the movable side electrode 4 to stop at three or more positions.

    摘要翻译： 目的在于提供一种结构简单的开关柜。 为了解决这个问题，根据本发明的开关装置的特征在于具有固定侧电极3，构造成与固定侧电极3接触或分离的可动侧电极4以及构造成允许驱动力 为了可动侧电极4的移动而产生，其中，用于操作可动侧电极4的操作机构包括一个操作机构，并且一个操作机构允许可动侧电极4在三个或更多个位置停止。

    Diagnostic method of switchgear and device thereof
    3.
    发明授权
    Diagnostic method of switchgear and device thereof 有权

    公开(公告)号：US11249137B2

    公开(公告)日：2022-02-15

    申请号：US16872585

    申请日：2020-05-12

    申请人： Hitachi, Ltd.

    发明人： Masaru Tatemi ,  Toshiaki Rokunohe ,  Masanori Otsuki ,  Akira Takahama

    IPC分类号： G01R31/327 ,  G01P15/00

    摘要： A diagnostic method of switchgear and a device of switchgear that allow regularly grasping a state with high accuracy with a simple configuration is provided. The diagnostic method of switchgear includes: obtaining signals from an acceleration sensor mounted to a switchgear and a load current flowing through the switchgear; determining a frequency to be focused from a spectrum analysis result of the signals from the acceleration sensor in an advance preparation phase of diagnosis of the switchgear, generating learning data using at least the frequency and the load current as feature values; and regularly diagnosing the state of the switchgear from the feature values obtained during diagnosis and the learning data during the diagnosis of the switchgear.

    Oil leakage detector and oil leakage detection method and image processing unit
    4.
    发明授权
    Oil leakage detector and oil leakage detection method and image processing unit 有权

    公开(公告)号：US10755442B2

    公开(公告)日：2020-08-25

    申请号：US15869508

    申请日：2018-01-12

    申请人： Hitachi, Ltd.

    发明人： Li Lu ,  Satoshi Ichimura ,  Tomohiro Moriyama ,  Jun Nukaga ,  Toshiaki Rokunohe ,  Akira Yamagishi ,  Yasutomo Saito

    IPC分类号： G06T7/40 ,  H04N9/04 ,  G06T7/00 ,  G06T7/90 ,  G06T7/136 ,  G01V8/00

    摘要： An oil leakage detector of the present invention includes an image processing unit wherein the image processing unit calculates the values of saturation and intensity of each pixel in the color image of the object after an ultra-violet light is irradiated thereon, draws an intensity-saturation characteristic line of the saturation expressed in an X-axis and the intensity expressed in a Y-axis, sets an upper limit and a lower limit of intensity of each saturation as a threshold value based on an area without oil adhesion on the surface of the object, and determines, in the intensity-saturation characteristic line, an area corresponding to a pixel group where the intensity exceeds the threshold value of the upper limit and a pixel group where the intensity falls below the threshold value of the lower limit, to be an oil leakage adhered area.

    Diagnosing device for on-load tap changing apparatus, diagnosing method for on-load tap changing apparatus, and diagnosing device for transformer
    5.
    发明授权
    Diagnosing device for on-load tap changing apparatus, diagnosing method for on-load tap changing apparatus, and diagnosing device for transformer 有权

    公开(公告)号：US10509021B2

    公开(公告)日：2019-12-17

    申请号：US16130308

    申请日：2018-09-13

    申请人： Hitachi, Ltd.

    发明人： Li Lu ,  Yoshio Hamadate ,  Toshiaki Rokunohe ,  Akira Yamagishi ,  Hideyuki Miyahara

    IPC分类号： G01N33/28 ,  H01F27/28 ,  G01N21/25

    摘要： There is provided a diagnosing device for an on-load tap changing apparatus of a transformer, which can diagnose the degradation degree of insulating oil at high accuracy by a relatively simple device configuration. A diagnosing device for an on-load tap changing apparatus has an insulating oil tank in which insulating oil is sealed, a changeover switching device that is disposed within the insulating oil tank and performs the tap changing operation of a tap winding, a tap selector that selects the tap position of the tap winding, and a polarity (transposition) changer that inverts the polarity of the tap winding or a winding connected to the tap winding. The diagnosing device includes an arc discharge light detector that detects arc discharge light that is emitted at changing the tap position of the tap selector. The degradation degree of the insulating oil is diagnosed based on the arc discharge light detected by the arc discharge light detector.

    Work terminal, oil leakage detection apparatus, and oil leakage detection method
    7.
    发明授权
    Work terminal, oil leakage detection apparatus, and oil leakage detection method 有权

    公开(公告)号：US11494888B2

    公开(公告)日：2022-11-08

    申请号：US16771103

    申请日：2018-11-05

    申请人： Hitachi, Ltd.

    发明人： Li Lu ,  Akira Nishimizu ,  Toshiaki Rokunohe ,  Akira Yamagishi

    IPC分类号： G06K9/00 ,  G06T7/00 ,  G01C3/02 ,  G01M3/38 ,  G01S19/01

    摘要： 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.

    Gas leak detection device and gas leak detection method
    8.
    发明授权
    Gas leak detection device and gas leak detection method 有权

    公开(公告)号：US10190935B2

    公开(公告)日：2019-01-29

    申请号：US15216736

    申请日：2016-07-22

    申请人： Hitachi, Ltd.

    发明人： Hisao Inami ,  Makoto Hirose ,  Hiroyuki Nakamichi ,  Masaru Tatemi ,  Toshiaki Rokunohe

    IPC分类号： G01M3/32 ,  H02B7/01 ,  H02B13/065

    摘要： A gas leak detection device includes a learning section, which has a correlation between a gas temperature inside gas pressure containers and a surface temperature of the gas pressure containers in a learning period corresponding to a current value flowing in the conductor, to make database, and a diagnosis section, which extracts a gas temperature corresponding to the measured current value and the surface temperature from the learning section in a diagnosis period, corrects a gas pressure value corresponding to an arbitrary surface temperature to a gas pressure value of a reference temperature using the extracted gas temperature, and detects a leak of the insulating gas based on the corrected gas pressure value.

    Gas Circuit Breaker
    9.
    发明申请
    Gas Circuit Breaker 审中-公开
    气体断路器

    公开(公告)号：US20150091677A1

    公开(公告)日：2015-04-02

    申请号：US14390594

    申请日：2013-03-27

    申请人： Hitachi, Ltd.

    发明人： Hajime Urai ,  Yasuaki Aoyama ,  Hiroaki Hashimoto ,  Katsuhiko Shiraishi ,  Tatsuro Kato ,  Ayumu Morita ,  Toshiaki Rokunohe ,  Yoichi Oshita

    IPC分类号： H01H71/32 ,  H01H71/12 ,  H01H71/02

    CPC分类号： H01H71/321 ,  H01H33/36 ,  H01H33/40 ,  H01H71/025 ,  H01H71/128 ,  H01H2003/268 ,  H02K16/00 ,  H02K41/031

    摘要： An object is to provide a gas circuit breaker having improved reliability. To solve the above-described problem, a gas circuit breaker is characterized by having a fixed contact, a movable contact configured to come into contact with or separate from the fixed contact, an insulating enclosure internally having the fixed contact and the movable contact, the inside of the insulating enclosure being filled with an insulating gas, and an operating mechanism configured to allow drive force for movement of the movable contact to be generated, wherein the operating mechanism includes a mover including permanent magnets or magnetic bodies disposed in a direction along which the operating mechanism allows the drive force to be generated, and a magnetic pole disposed to be opposed to the mover, and having a winding.

    摘要翻译： 目的是提供一种具有改进的可靠性的气体断路器。 为了解决上述问题，气体断路器的特征在于具有固定触点，构造成与固定触点接触或分离的可动触头，内部具有固定触点和可动触点的绝缘外壳， 绝缘壳体的内部填充有绝缘气体;以及操作机构，其构造成允许用于所要生成的可动触头的移动的驱动力，其中，所述操作机构包括动子，所述动子包括永磁体或磁体， 所述操作机构允许产生驱动力，以及设置成与所述动子对置并具有绕组的磁极。