STRESSES INFLUENCE ON MAGNETIC CHARACTERISTICS OF AMORPHOUS RING CORES FOR CURRENT TRANSDUCERS

Jacek Salach

   This paper presents results of investigation of stress influence on magnetic characteristics of amorphous ring cores for cur-rent transducers. Ring-shaped cores were made of Co₆₆Fe₄Ni₁Si₁₅B₁₄ amorphous alloy in as-quenched state, and after annealing. Thermal treatment was performed to improve the magnetic properties of amorphous core, ie to obtain a narrower hysteresis loop and a higher maximum flux density. Investigation of influence of compressive and tensile stresses on magnetic parameters of ring shaped cores was conducted to select a core least susceptible to the influence of stresses, and thus most suitable for in-dustrial current transducer applications.

Keywords: current transducers, magnetoelastic effect, amorphous alloys

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