Digitally Switched Voltage Controlled Current Sources for Application in Hysteresisgraph of Low Magnetizing Fields

Maciej Kachniarz , Kinga Kołakowska


The paper presents the design and construction of the digitally switched system of the voltage controlled bipolar current sources. The developed current sources are modified version of the classic Howland current pump adjusted to deliver sinusoidal current waveform of amplitude 1–10 mA and 10–100 mA. The voltage input and current output are switched between developed current sources with the digital 2-channel switch controlled with LPC1115 microcontroller. The developed device can be applied in the hysteresisgraph for investigation of soft ferromagnetic materials in low magnetizing fields region known as the Rayleigh region. The SPICE simulations and results obtained with the developed device indicate that it works correctly and allows to investigate even very soft ferromagnetic amorphous alloys in low magnetizing fields.
Author Maciej Kachniarz (FM / IMBE) - [Industrial Research Institute for Automation and Measurements (PIAP)]
Maciej Kachniarz,,
- The Institute of Metrology and Biomedical Engineering
- Państwowy Instytut Automatyki Przemysłowej
, Kinga Kołakowska (FM / IMBE)
Kinga Kołakowska,,
- The Institute of Metrology and Biomedical Engineering
Publication size in sheets0.5
Book Szewczyk Roman, Zieliński Cezary, Kaliczyńska Małgorzata: Advances in Automation, Robotics and Measurement Techniques, Advances in Intelligent Systems and Computing, vol. 743, 2018, Springer International Publishing AG , ISBN 978-3-319-77178-6, 795 p., DOI:10.1007/978-3-319-77179-3
Keywords in EnglishBipolar current source, Low current, Digital control, Hysteresisgraph, Magnetic measurements, Rayleigh region, Soft magnetic materials
Languageen angielski
Score (nominal)15
ScoreMinisterial score = 15.0, 03-04-2018, BookChapterSeriesAndMatConf
Ministerial score (2013-2016) = 15.0, 03-04-2018, BookChapterSeriesAndMatConf
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