公开(公告)号：US20130300404A1

公开(公告)日：2013-11-14

申请号：US13945760

申请日：2013-07-18

Applicant: ALPS Green Devices Co., Ltd.

Inventor： Hiroyuki HEBIGUCHI

IPC: G01R33/02

CPC classification number: G01R33/02 ,  G01R15/205 ,  G01R33/0005 ,  G01R33/07 ,  H01L43/08 ,  H01L2924/30107

Abstract: A first magnetic sensor and a second magnetic sensor are disposed so that the main sensitivity axis direction of the first magnetic sensor is oriented in the direction of an induction magnetic field from a current flowing through a current line, the main sensitivity axis direction of the second magnetic sensor is oriented in a direction opposite to the direction of an induction magnetic field from the current flowing therethrough, the individual main sensitivity axis directions of the first and second magnetic sensors are oriented in a same direction, and the individual sub-sensitivity axis directions of the first and second magnetic sensors are oriented in the same directions as or directions opposite to the directions of the sub-sensitivity axis components of the induction magnetic fields to which the first and second magnetic sensors are individually subjected from a current flowing through an adjacent current line adjacent to the current line.

Abstract translation: 第一磁传感器和第二磁传感器被布置成使得第一磁传感器的主感光度轴方向从流过电流线的电流沿感应磁场的方向取向，第二磁传感器的主感测轴方向 磁传感器沿着与从其流过的电流的感应磁场的方向相反的方向定向，第一和第二磁传感器的各主要灵敏度轴方向被定向在相同的方向上，并且各个副敏感度轴方向 第一和第二磁性传感器的方向与第一和第二磁性传感器从流经相邻的电流的电流分别受到的感应磁场的副敏感度轴分量的方向相反的方向 当前行与当前行相邻。

公开(公告)号：US20130293224A1

公开(公告)日：2013-11-07

申请号：US13939075

申请日：2013-07-10

Applicant: ALPS GREEN DEVICES CO., LTD.

Inventor： Yasuo KOTERA ,  Manabu TAMURA ,  Hisanori KIYOMATSU

IPC: G01R31/28 ,  G01R19/10

CPC classification number: G01R31/2829 ,  G01R15/205 ,  G01R19/0092 ,  G01R19/10

Abstract: There is provided a current sensor capable of performing malfunction determination with high accuracy even under the influence of an adscititious magnetic field. A current sensor includes first and second current sensor units, a computation unit, a storage unit, and a determination processing unit. The first current sensor unit measures a target current. The first and second current sensor units have almost the same sensitivity. The computation unit calculates and outputs an addition value and a difference value of outputs of the first and second current sensor units. In the storage unit, the addition and difference values output from the computation unit are stored. The determination processing unit determines whether a malfunction has occurred by using the addition and difference values stored in the storage unit. The determination processing unit determines that a malfunction has occurred, in a case where there is a correlation between the addition and difference values.

Abstract translation: 提供了即使在不规则磁场的影响下也能够以高精度执行故障判定的电流传感器。 电流传感器包括第一和第二电流传感器单元，计算单元，存储单元和确定处理单元。 第一个电流传感器单元测量目标电流。 第一和第二电流传感器单元具有几乎相同的灵敏度。 计算单元计算并输出第一和第二电流传感器单元的输出的相加值和差值。 在存储单元中，存储从计算单元输出的加法和差值。 确定处理单元通过使用存储在存储单元中的加和差值来确定是否发生故障。 在加法和差值之间存在相关性的情况下，确定处理单元确定发生故障。

公开(公告)号：US20130221998A1

公开(公告)日：2013-08-29

申请号：US13856345

申请日：2013-04-03

Applicant: Alps Green Devices Co., Ltd.

Inventor： Yosuke IDE ,  Masamichi SAITO ,  Akira TAKAHASHI ,  Kenji ICHINOHE ,  Yoshihiro NISHIYAMA

IPC: G01R19/00

CPC classification number: G01R19/00 ,  B82Y5/00 ,  B82Y25/00 ,  G01R15/205 ,  G01R33/093 ,  G11B3/00 ,  H01F1/00 ,  H01L43/08

Abstract: A current sensor includes a magnetoresistive element that has a stripe shape and that has a sensing axis in a certain direction. The magnetoresistive element includes element portions that are disposed so as to be spaced apart from each other in a longitudinal direction of the stripe shape, and permanent magnet portions, each of which is disposed between adjacent ones of the element portions. Each element portion has a layered structure including a free magnetic layer whose magnetization direction is changed with respect to an external magnetic field, a non-magnetic intermediate layer, and a ferromagnetic pinned layer whose magnetization direction is pinned. The permanent magnet portion includes a hard bias layer, and an electrode layer that is disposed so as to cover the hard bias layer.

Abstract translation: 电流传感器包括磁阻元件，该磁阻元件具有条形并且在一定方向上具有感测轴。 磁阻元件包括沿条带形状的纵向方向彼此间隔开的元件部分和设置在相邻元件部分之间的永磁体部分。 每个元件部分具有层状结构，其包括磁化方向相对于外部磁场而变化的自由磁性层，非磁性中间层和磁化方向被钉扎的铁磁性钉扎层。 永久磁铁部分包括硬偏置层和设置成覆盖硬偏置层的电极层。

公开(公告)号：US20130127456A1

公开(公告)日：2013-05-23

申请号：US13743274

申请日：2013-01-16

Applicant: ALPS GREEN DEVICES CO., LTD.

Inventor： Hiroyuki HEBIGUCHI

IPC: G01R33/09

CPC classification number: G01R33/093 ,  B82Y25/00 ,  G01R15/205 ,  G01R15/207 ,  G01R33/0041 ,  G01R33/09

Abstract: A magnetic balance type current sensor includes: a magnetic detection bridge circuit of which output varies due to an induced magnetic field from a current wire; a magnetic field attenuation unit that attenuates the induced magnetic field that acts on a magnetoresistive effect element; and a feedback coil which generates a cancel magnetic field that cancels the induced magnetic field in accordance with the output of the magnetic detection bridge circuit, and through which a current corresponding to the current to be measured flows when it enters a balanced state in which the cancel magnetic field and the induced magnetic field cancel each other, wherein the feedback coil is provided in such a manner that a direction of the cancel magnetic field that acts on the magnetic field attenuation unit is opposite to a direction of the induced magnetic field that acts on the magnetic field attenuation unit.

Abstract translation: 磁平衡型电流传感器包括：磁检测桥电路，其输出由于来自电流线的感应磁场而变化; 磁场衰减单元，其衰减作用在磁阻效应元件上的感应磁场; 以及反馈线圈，其产生根据磁检测桥电路的输出抵消感应磁场的抵消磁场，并且当与待测电流对应的电流进入平衡状态时， 取消磁场和感应磁场彼此抵消，其中反馈线圈以使得作用在磁场衰减单元上的抵消磁场的方向与感应磁场的方向相反的方式被提供， 在磁场衰减单元上。

公开(公告)号：US20130033260A1

公开(公告)日：2013-02-07

申请号：US13650069

申请日：2012-10-11

Applicant: ALPS GREEN DEVICES CO., LTD.

Inventor： Masatoshi NOMURA

IPC: G01R33/038 ,  G01R33/09

CPC classification number: G01R15/207 ,  G01R15/205 ,  G01R31/364 ,  G01R33/0041

Abstract: A current sensor includes a pair of magnetic balance sensors and a switching circuit. The magnetic balance sensors each include a magnetic sensor element and a feedback coil. The magnetic sensor element varies in characteristics due to an induction field caused by measurement current. The feedback coil is disposed near the magnetic sensor element and produces a canceling magnetic field canceling out the induction field. Each of the magnetic balance sensors outputs, as a sensor output, a value corresponding to current flowing through the feedback coil when a balanced state in which the induction field and the canceling magnetic field cancel each other out is reached after the feedback coil is energized. The switching circuit turns on/off one of the magnetic balance sensors.

Abstract translation: 电流传感器包括一对磁平衡传感器和开关电路。 磁平衡传感器各自包括磁传感器元件和反馈线圈。 由于由测量电流引起的感应场，磁性传感器元件的特性变化。 反馈线圈设置在磁传感器元件附近，并产生抵消感应场的消除磁场。 每个磁平衡传感器作为传感器输出，当在反馈线圈通电之后达到感应场和抵消磁场抵消的平衡状态时，输出与流过反馈线圈的电流对应的值。 开关电路打开/关闭其中一个磁平衡传感器。