MAGNETIC SENSOR DEVICE AND CURRENT SENSOR

• Main Authors: WATANABE KATSU, TAKANO KENICHI, SAITO YUTA
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To provide a current sensor that expands the range of values of detectable detection target current and reduces errors occurring to a current detection value.SOLUTION: A current sensor 1 includes a magnetic sensor device. The magnetic sensor device includes a magnetic sensor 12, a first magnetic layer 51, and a second magnetic layer 52 not in contact with the first magnetic layer 51. The magnetic sensor 12, first magnetic layer 51, and second magnetic layer 52 are disposed side by side in this order so as to intersect with a virtual straight line L and in a direction in parallel with the virtual straight line L. Parts different from each other of a magnetic flux generated by detection target current pass through the respective magnetic sensor 12, first magnetic layer 51, and second magnetic layer 52.SELECTED DRAWING: Figure 2 【課題】電流センサにおいて、検出可能な検出対象電流の値の範囲を拡大し、且つ電流検出値に生じる誤差を低減する。【解決手段】電流センサ１は磁気センサ装置を含んでいる。磁気センサ装置は、磁気センサ１２と、第１の磁性層５１と、第１の磁性層５１に接触していない第２の磁性層５２を含んでいる。磁気センサ１２と第１の磁性層５１と第２の磁性層５２は、仮想の直線Ｌと交差し、且つ仮想の直線Ｌに平行な方向にこの順で並ぶように配置されている。磁気センサ１２と第１の磁性層５１と第２の磁性層５２では、検出対象電流によって発生する磁束のうちの互いに異なる一部が通過する。【選択図】図２