Beyer Law Group LLP
Magnetic balance type current sensor
A magnetic balance type current sensor includes a magnetoresistance effect element whose resistance value changes owing to the application of an induction magnetic field from a current to be measured; a feedback coil disposed in the vicinity of the magnetoresistance effect element and generating a cancelling magnetic field cancelling out the induction magnetic field; a magnetic field detection bridge circuit including two outputs causing a voltage difference corresponding to the induction magnetic field to occur; and a magnetic shield attenuating the induction magnetic field and enhancing the cancelling magnetic field, wherein, on the basis of the current flowing through the feedback coil at the time of an equilibrium state in which the induction magnetic field and the cancelling magnetic field are cancelled out, the current to be measured is measured, wherein the feedback coil, the magnetic shield, and the magnetic field detection bridge circuit are formed on a same substrate.
Alps Green Devices., Ltd.
G G B G
G01R G01R B82Y G01R
inventional inventional inventional additional
Tatsuya Hideharu Yosuke Akira Yoshihiro Masamichi Naoki Shigenobu Hidekazu Tsuyoshi Masahiro Kenji
Kogure Matsuo Ide Takahashi Nishiyama Saito Sakatsume Miyajima Kobayashi Nojima Iizuka Ichinohe