Beyer Law Group, LLP
Magnetic-balance-system current sensor
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.
Alps Green Devices Co., Ltd.
G B G
G01R B82Y G01R
inventional inventional inventional
Masamichi Akira Shigenobu Masahiro Yoshihiro Yosuke Naoki Kenji Hidekazu Tsuyoshi Tatsuya
Saito Takahashi Miyajima Iizuka Nishiyama Ide Sakatsume Ichinohe Kobayashi Nojima Kogure