PSPICE MODEL FOR SIMULATING THE GMI EFFECT IN MAGNETIC AMORPHOUS WIRES

Cristian Fosalau, Catalin Damian, Cristian Zet

Abstract

The paper presents an electrical model developed for Pspice simulation of the behavior of the magnetic amorphous wires working under the Giant Magnetoimpedance (GMI) effect. The model was developed in order to facilitate the design of the signal conditioning circuitry belonging to the new category of transducers whose sensitive elements are based on the GMI effect. Its complexity arises from the fact that the effect is influenced by many internal or external factors whose actions have to be taken into consideration in the designing phase. In order to assess its performances, the model was tested by simulating a magnetic field transducer whose signal processing circuit is reprezented by a Colpitts oscillator. It was found that the model provides good accuracy even in nonlinear regions of the characteristic, where the mathematical approximation is quite imprecise. Theoretically, the model can be extended to any number of input quantities, but its complexity and computation time increase exponentially. By extension, it can be successfully utilized to simulate transducers based on any other nonlinear magnetic material.

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DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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