利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

18 条记录 (耗时 0.016 秒)

    Partial discharge charge amount measuring method and device
    1.
    发明授权
    Partial discharge charge amount measuring method and device 有权

    公开(公告)号：US09645189B2

    公开(公告)日：2017-05-09

    申请号：US14088209

    申请日：2013-11-22

    申请人： Hitachi Metals, Ltd.

    发明人： Yosuke Sumi ,  Naofumi Chiwata ,  Hideyuki Kikuchi

    IPC分类号： G01R31/12 ,  G01R31/14

    CPC分类号： G01R31/14 ,  G01R31/12 ,  G01R31/1227 ,  G01R31/1263 ,  G01R31/1272

    摘要： A partial discharge charge amount measuring method includes generating a partial discharge in a sample by applying a voltage from a voltage impressing device connected to the sample, the voltage being higher than a partial discharge inception voltage, continuously measuring and recording terminal voltages of a capacitor connected in series between the sample and a ground at least until a breakdown of the sample occurs by alternately operating at least two data loggers connected to the capacitor at intervals of a predetermined time, calculating an amount of electric charge discharged from the sample and remaining in the capacitor by multiplying a difference in the recorded terminal voltages of the capacitor by a capacitance of the capacitor, and calculating an accumulated discharge amount by accumulating the discharged amount of electric charge at earliest until the breakdown of the sample occurs.

    Current detection structure
    2.
    发明授权
    Current detection structure 有权
    电流检测结构

    公开(公告)号：US09513317B2

    公开(公告)日：2016-12-06

    申请号：US14600716

    申请日：2015-01-20

    申请人： Hitachi Metals, Ltd.

    发明人： Ken Okuyama ,  Naofumi Chiwata ,  Katsuya Akimoto ,  Naoki Futakuchi ,  Yukio Ikeda ,  Kazuhisa Takahashi

    IPC分类号： G01R15/00 ,  G01R19/00 ,  G01R33/09 ,  G01R15/20

    CPC分类号： G01R19/0092 ,  G01R15/205 ,  G01R15/207 ,  G01R33/093

    摘要： A current detection structure includes a busbar to flow a current therethrough, a magnetic detection element to detect a strength of a magnetic field generated by the current flowing through the busbar, and a current detecting portion to determine the current flowing through the busbar based on the magnetic field detected by the magnetic detection element. A through-hole is formed penetrating the busbar such that a current path is formed on both sides of the through-hole. The magnetic detection element is disposed in the through-hole. The current detecting portion determines the current flowing through the busbar based on a strength of a synthetic magnetic field detected by the magnetic detection element. The synthetic magnetic field is produced by combining a magnetic field that is generated by a current flowing through the current path on the both sides of the through-hole.

    摘要翻译： 电流检测结构包括用于流过电流的母线，用于检测由流过母线的电流产生的磁场的强度的磁检测元件，以及电流检测部分，用于基于电流检测部分确定流过母线的电流 由磁检测元件检测的磁场。 穿过母线的通孔形成在通孔的两侧形成电流通路。 磁检测元件设置在通孔中。 电流检测部基于由磁检测元件检测出的合成磁场的强度来确定流经母线的电流。 合成磁场通过将通过流过通孔的电流的电流产生的磁场组合在通孔的两侧而产生。

    Shielded cable
    4.
    发明授权
    Shielded cable 有权
    屏蔽电缆

    公开(公告)号：US09530542B2

    公开(公告)日：2016-12-27

    申请号：US14618793

    申请日：2015-02-10

    申请人： Hitachi Metals, Ltd.

    发明人： Katsuya Akimoto ,  Naofumi Chiwata ,  Yosuke Sumi ,  Katsutoshi Nakatani ,  Kenji Ajima ,  Hiroshi Okikawa ,  Yasuharu Muto

    IPC分类号： H01B11/06 ,  H01B11/10 ,  H01B3/30

    CPC分类号： H01B11/1083 ,  H01B3/30 ,  H01B11/1008

    摘要： A shielded cable includes an insulated wire including a conductor wire and an insulation formed around the conductor wire, and a shield layer formed around the insulated wire and including a shield wire. The shield wire includes a tubular member including a conductive material and defining a gap therein, and a magnetic powder is filled in the gap.

    摘要翻译： 屏蔽电缆包括绝缘线，其包括导线和围绕导线形成的绝缘体，以及围绕绝缘电线形成并包括屏蔽线的屏蔽层。 屏蔽线包括包括导电材料并在其中限定间隙的管状构件，并且磁性粉末填充在间隙中。

    Current detection method, current detection device, signal correction method for current detection device, and signal correction device for current detection device
    7.
    发明授权
    Current detection method, current detection device, signal correction method for current detection device, and signal correction device for current detection device 有权

    公开(公告)号：US10996246B2

    公开(公告)日：2021-05-04

    申请号：US15517614

    申请日：2014-10-10

    申请人： Hitachi Metals, Ltd.

    发明人： Naoki Futakuchi ,  Naofumi Chiwata ,  Katsuya Akimoto

    IPC分类号： G01R15/20 ,  G01R33/09

    摘要： A current detection method for a current detection device including magnetism detection elements that detect magnetic flux density and output a voltage signal corresponding to the magnetic flux density is provided. The method includes acquiring measured value data that is obtained as a result of providing magnetic flux density in a detectable range of the magnetism detection elements that indicates the relationship between the magnetic flux density and an output voltage signal from the current detection device. Next, computational processing is performed so as to fit the acquired measured value data to a formula that includes plural factors and indicates the output voltage of the magnetism detection elements, thereby calculating the plural factors, and correcting the output voltage signal from the magnetism detection elements in accordance with the calculated factors so as to be approximately linear with respect to the magnetic flux density. Finally, a corrected voltage signal obtained by the correction is outputted.

    Electric current sensor
    8.
    发明授权
    Electric current sensor 有权

    公开(公告)号：US09880206B2

    公开(公告)日：2018-01-30

    申请号：US14600784

    申请日：2015-01-20

    申请人： Hitachi Metals, Ltd.

    发明人： Katsuya Akimoto ,  Hisashi Tate ,  Naoki Futakuchi ,  Naofumi Chiwata ,  Ken Okuyama ,  Yukio Ikeda ,  Kazuhisa Takahashi

    IPC分类号： G01R19/00 ,  G01R33/09 ,  G01R19/25 ,  G01R15/20

    CPC分类号： G01R19/0092 ,  G01R15/205 ,  G01R15/207 ,  G01R19/25 ,  G01R33/093

    摘要： An electric current sensor includes a plurality of bus bars arranged in parallel, a plurality of magnetic detection elements that are adapted to detect a strength of a magnetic field generated by an electric current flowing through the bus bars and to output a voltage according to the strength of the magnetic field detected, and an arithmetic operation part to arithmetically operate an electric current flowing through the bus bars based on the voltage output from the plurality of magnetic detection elements. The arithmetic operation part includes a magnetic flux density arithmetic operation part to arithmetically operate a magnetic flux density based on the voltage, and an electric current arithmetic operation part to arithmetically operate an electric current I1 to Im flowing through each of the bus bars based on formula (1) below, ( B 1 = a 11 · I 1 + a 12 · I 2 + … + a 1 ⁢ ⁢ n · I n B 2 = a 21 · I 1 + a 22 · I 2 + … + a 2 ⁢ n · I n B 3 = a 31 · I 1 + a 32 · I 2 + … + a 3 ⁢ n · I n ⋮ ⁢ ⁢ ⋮ B m = a m ⁢ ⁢ 1 · I 1 + a m ⁢ ⁢ 2 · I 2 + … + a mn · I n ⁢ ⁢ where ⁢ ⁢ a 11 ⁢ ⁢ to ⁢ ⁢ a mn ⁢ ⁢ are ⁢ ⁢ coefficients , ( 1 ) B1 to Bm are a magnetic flux density and I1 to Im are an electric current.