Precise current sensor by means of small-angle magnetization rotation using amorphous wire and its industrial application

Tayaoka, A.; Yoshida, Yusuke; Yamasaki, J.; Mohri, K.; Yoshino, Keiichi

doi:10.1109/20.281129

Cited by 5 publications

(1 citation statement)

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“…In particular, some progress has been achieved in research on GMI current sensing applications [ 12 , 18 , 19 ]. The materials of the GMI probe of the current sensors mainly include amorphous wires [ 19 , 20 , 21 ], thin films [ 22 , 23 , 24 ], and amorphous ribbons [ 25 , 26 , 27 ], which all have good soft magnetic properties. Compared to amorphous wires, both thin films and amorphous ribbons can be patterned, which meets the diverse design needs of GMI probes.…”

Section: Introductionmentioning

confidence: 99%

Non-Contact Current Sensing System Based on the Giant Magnetoimpedance Effect of CoFeNiSiB Amorphous Ribbon Meanders

Yang,

Wang,

Liu

et al. 2024

Micromachines

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A sensitive non-contact sensing system based on the CoFeNiSiB amorphous ribbon giant magnetoimpedance (GMI) effect is proposed for current testing. The sensing system consists of a GMI probe, a sinusoidal current generator, a voltage follower, a preamplifier, a low-pass filter, and a peak detector. Four different GMI probes derived from amorphous ribbon meanders are designed and fabricated through MEMS processes. GMI probes were driven by a 10 MHz, 5 mA AC current. A permanent magnet was used to provide a bias magnetic field for the probe. The effect of the bias magnetic field on the output DC voltage was investigated. This non-contact current sensing system exhibits good sensitivity and linearity at a bias magnetic field Hbias = 15 Oe. The sensitivity can reach up to 24.2 mV/A in the ±1.5 A range.

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