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