ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A dc electric current sensor, based on the magnetoimpedance phenomenon, is presented. The basic element of this sensor is a nonmagnetotstrictive, amorphous ferromagnetic wire of composition (Co0.94Fe0.06)72,5B15Si12.5, in the as-cast state. The dc current to be monitored flows through a solenoid, and the magnetic field produced by this solenoid on the wire leads to a controlled decrease of its impedance response. This impedance dependence on the axial field is used to measure the dc current. An important feature of this sensor is its reduced dimensions, since the whole device (sensing wire, solenoid, ac current generator) fits into a 2×2×1 cm3 volume. A discussion on its thermal stability, reproducibility, and wire contact preparation is presented. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.364809
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