Magnetic response of mild steel at various analyzing parameters

Abstract

Abstract Objective of current study is to analyse the effect of excitation frequency, magnetic field intensity and waveform on the hysteresis loop and Barkhausen Noise signals. As the property of ferromagnetic material especially the hysteresis loop and Barkhausen noise depends on microstructure, excitation frequency and magnetic field intensity. In this study the hysteresis loop and Barkhausen noise of the mild steel sample were experimentally measured by varying the frequency, intensity and waveform using magnetic Barkhausen noise analyser. Sinusoidal and triangular waveform were applied in varying frequency (0.1 Hz to 0.4 Hz) and intensity (250 Oe to 1000 Oe) for hysteresis loop whereas for Barkhausen noise analysis frequency varies from 20 Hz to 50 Hz and intensity varies from 250 Oe to 1000 Oe. Characteristics of hysteresis loop and magnetic Barkhausen noise depends upon magnetizing parameter and waveforms were explained with the help of micro magnetic theory.