公开(公告)号：US09041392B2

公开(公告)日：2015-05-26

申请号：US13939075

申请日：2013-07-10

Applicant: ALPS GREEN DEVICES CO., LTD.

Inventor： Yasuo Kotera ,  Manabu Tamura ,  Hisanori Kiyomatsu

IPC: G01R33/02 ,  G01R31/28 ,  G01R19/00 ,  G01R19/10 ,  G01R15/20

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进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。