A system for controllable magnetic measurements of hysteresis and Barkhausen noise

0461354 - FZÚ 2017 RIV US eng J - Journal Article
Stupakov, Oleksandr - Perevertov, Oleksiy - Zablotskyy, Vitaliy A.
A system for controllable magnetic measurements of hysteresis and Barkhausen noise.
IEEE Transactions on Instrumentation and Measurement. Roč. 65, č. 5 (2016), s. 1087-1097. ISSN 0018-9456. E-ISSN 1557-9662.
[IEEE International Instrumentation and Measurement Technology Conference (I2MTC 2015). Pisa, 11.05.2015-14.05.2015]
R&D Projects: GA ČR GA13-18993S
Institutional support: RVO:68378271
Keywords : Barkhausen effect * feedback circuits * magnetic field measurement * magnetic hysteresis * magnetization processes * silicon steel
Subject RIV: JB - Sensors, Measurment, Regulation
Impact factor: 2.456, year: 2016

A specially developed setup for precise measurement of magnetic hysteresis and Barkhausen noise is presented. The setup combines two main features: 1) an accurate local determination of the magnetic field and 2) an improved feedback control of the magnetization process. The magnetic field is measured by two Hall sensors at different distances above the sample. The sample field is determined by a linear extrapolation of these measured profiles of the tangential fields to the sample surface. A digital feedback loop for precise control of the ac magnetization process is proposed. The feedback algorithm combines two methods of magnetizing signal adjustment: linear corrections of the magnetizing voltage amplitude and phase. The presented system is able to adjust the waveform of the magnetic induction or field to the prescribed sinusoidal or triangular shape. This provides stable and physically accurate results, which are independent of a specific experimental configuration.
Permanent Link: http://hdl.handle.net/11104/0261823