Electronic Hysteresigraph Holds dB/dt Constant
- 1 May 1966
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 37 (5) , 548-552
- https://doi.org/10.1063/1.1720248
Abstract
An electronic instrument able to trace on a X-Y recorder all types of magnetic curves of ferromagnetic materials and having better performance than ordinary ballistic equipments is described. The main features of the instrument are (a) the ability to trace any magnetic curve keeping the induction flux derivative constant, which minimizes the errors due to eddy currents in the specimen, and (b) the extremely low drift of the integrating circuit, which allows it to trace hysteresis loops of specimens of normal dimensions in times as long as 30 min, yet maintaining the accuracy within 1%. Sensitivity, accuracy, errors due to eddy currents, and comparison with ordinary ballistic methods are discussed in detail in the text. Many experimental results are also given.Keywords
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