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    Current measurement apparatus having a series of magnetoresistive effect elements disposed in a ring shape
    1.
    发明授权
    Current measurement apparatus having a series of magnetoresistive effect elements disposed in a ring shape 有权
    具有以环状设置的一系列磁阻效应元件的电流测量装置

    公开(公告)号：US09170281B2

    公开(公告)日：2015-10-27

    申请号：US13608563

    申请日：2012-09-10

    申请人： Nobuhiro Hayashi ,  Tatsuya Kogure ,  Akira Takahashi

    发明人： Nobuhiro Hayashi ,  Tatsuya Kogure ,  Akira Takahashi

    IPC分类号： G01R19/00 ,  G01R15/20 ,  B82Y25/00 ,  G01R33/09

    CPC分类号： G01R15/205 ,  B82Y25/00 ,  G01R33/093

    摘要： A current measurement apparatus includes multiple GMR elements and a calculation unit. The multiple GMR elements each include a pinned magnetic layer having a pinned magnetization direction, and a free magnetic layer having a magnetization direction to be changed by an external magnetic field. The calculation unit obtains the magnitude of a current to be detected, from outputs of the multiple GMR elements. The multiple GMR elements are disposed in ring shape around a conductor through which the current to be detected flows, and are electrically connected so as to form a series variable resistor by using the multiple GMR elements. The magnetization directions of the pinned magnetic layers are pinned in the same direction when viewed from an extension direction of the conductor at each of the positions of the elements.

    摘要翻译： 电流测量装置包括多个GMR元件和计算单元。 多个GMR元件各自包括具有钉扎磁化方向的钉扎磁性层和具有由外部磁场改变的磁化方向的自由磁性层。 计算单元从多个GMR元件的输出获得要检测的电流的大小。 多个GMR元件围绕导体设置为环形，待检测的电流通过该导体流动，并且被电连接，以便通过使用多个GMR元件形成串联可变电阻器。 当在元件的每个位置处从导体的延伸方向观察时，被钉扎的磁性层的磁化方向被固定在相同的方向上。

    Magnetic balance type current sensor
    2.
    发明授权
    Magnetic balance type current sensor 有权
    磁平衡式电流传感器

    公开(公告)号：US08269492B2

    公开(公告)日：2012-09-18

    申请号：US12891550

    申请日：2010-09-27

    申请人： Masamichi Saito ,  Akira Takahashi ,  Masahiro Iizuka ,  Tatsuya Kogure ,  Yosuke Ide ,  Yoshihiro Nishiyama ,  Kenji Ichinohe ,  Naoki Sakatsume ,  Tsuyoshi Nojima ,  Shigenobu Miyajima ,  Hidekazu Kobayashi

    发明人： Masamichi Saito ,  Akira Takahashi ,  Masahiro Iizuka ,  Tatsuya Kogure ,  Yosuke Ide ,  Yoshihiro Nishiyama ,  Kenji Ichinohe ,  Naoki Sakatsume ,  Tsuyoshi Nojima ,  Shigenobu Miyajima ,  Hidekazu Kobayashi

    IPC分类号： G01R33/09

    CPC分类号： G01R15/205 ,  H01L43/08

    摘要： A magnetic balance type current sensor measures a measured current which flows in a feedback coil when electrical conduction is provided by a voltage difference according to an induction magnetic field from the measured current and an equilibrium state is reached in which the induction magnetic field and a cancel magnetic field cancel each other. Sensor elements in a pair are arranged at positions with magnetic field from the measured current. The magnetization direction of the pinned magnetic layer in the magnetoresistive effect element of one sensor element is aligned in a forward direction with respect to the magnetic field formed by the measured current. The magnetization direction of the pinned magnetic layer in the magnetoresistive effect element of the other sensor element is aligned in a reverse direction with respect to the magnetic field formed by the measured current.

    摘要翻译： 磁平衡型电流传感器测量在通过根据来自测量电流的感应磁场的电压差提供电传导时在反馈线圈中流动的测量电流，并且达到平衡状态，其中感应磁场和取消 磁场相互抵消。 一对传感器元件被布置在具有来自测量电流的磁场的位置处。 一个传感器元件的磁阻效应元件中的钉扎磁性层的磁化方向相对于由测量电流形成的磁场在正向方向上排列。 另一传感器元件的磁阻效应元件中的钉扎磁性层的磁化方向相对于由测量电流形成的磁场的反方向排列。

    Magnetic-balance-system current sensor
    4.
    发明授权
    Magnetic-balance-system current sensor 有权
    磁平衡系统电流传感器

    公开(公告)号：US08519704B2

    公开(公告)日：2013-08-27

    申请号：US13300076

    申请日：2011-11-18

    申请人： Yosuke Ide ,  Masamichi Saito ,  Akira Takahashi ,  Tsuyoshi Nojima ,  Shigenobu Miyajima ,  Naoki Sakatsume ,  Kenji Ichinohe ,  Yoshihiro Nishiyama ,  Tatsuya Kogure ,  Hidekazu Kobayashi ,  Masahiro Iizuka

    发明人： Yosuke Ide ,  Masamichi Saito ,  Akira Takahashi ,  Tsuyoshi Nojima ,  Shigenobu Miyajima ,  Naoki Sakatsume ,  Kenji Ichinohe ,  Yoshihiro Nishiyama ,  Tatsuya Kogure ,  Hidekazu Kobayashi ,  Masahiro Iizuka

    IPC分类号： G01R33/09

    CPC分类号： G01R15/205 ,  B82Y25/00 ,  G01R33/093

    摘要： A magnetic-balance-system current sensor includes: a magnetoresistive element, a resistance value of the magnetoresistive element being changed by applying an induction magnetic field generated by a measurement target current; magnetic cores disposed near the magnetoresistive element; a feedback coil disposed near the magnetoresistive element and configured to generate a cancelling magnetic field that cancels out the induction magnetic field; and a magnetic-field detecting bridge circuit having two outputs. The measurement target current is measured on the basis of a current flowing through the feedback coil when the induction magnetic field and the induction magnetic field and the cancelling magnetic field cancel each other out. The feedback coil, the magnetic cores, and the magnetic-field detecting bridge circuit are formed on a same substrate. The feedback coil is of a spiral type, and the magnetic cores are provided above and below the feedback coil.

    摘要翻译： 磁平衡系统电流传感器包括：磁阻元件，通过施加由测量目标电流产生的感应磁场来改变磁阻元件的电阻值; 设置在磁阻元件附近的磁芯; 设置在磁阻元件附近并被配置为产生抵消感应磁场的消除磁场的反馈线圈; 以及具有两个输出的磁场检测桥接电路。 当感应磁场和感应磁场和消除磁场相互抵消时，基于流过反馈线圈的电流来测量测量目标电流。 反馈线圈，磁芯和磁场检测桥式电路形成在同一基板上。 反馈线圈是螺旋型的，并且磁芯设置在反馈线圈的上方和下方。