Comparison of magnetic properties of toroidal cores using in aerospace industry

Derebaşı N.

7th International Conference on Superconductivity and Magnetism (ICSM2021), Muğla, Turkey, 21 - 27 October 2021, pp.346

  • Publication Type: Conference Paper / Summary Text
  • City: Muğla
  • Country: Turkey
  • Page Numbers: pp.346
  • Bursa Uludag University Affiliated: Yes


Comparison of magnetic properties of toroidal cores using in aerospace industry


Naim Derebasi1 and Ismet Gucuyener2


1 Physics Department, Uludag University, Gorukle Bursa, 16059, Turkey

2 Vocation School of Technical Science, Uludağ University, Gorukle Bursa, 16059, Turkey


Power loss, permeability, remenance, coercivity of cores at medium magnetising frequencies are becoming an important economic, efficiency and performance consideration in the design of power conversation equipment at aerospace industry. Performance requirements vary widely in traditional and emerging materials. This choice is often made more difficult because of a lack of suitable comparative magnetic data measured under medium frequency magnetisation condition. Grain oriented 3% SiFe is traditionally used widely, however recent competing materials with improved magnetic properties are being produced but very few direct comparison of magnetic properties have been reported.

            In this research direct comparison of ac properties of toroidal cores made from wound grain oriented, amorphous and nano-crystalline strip materials cores. Measurements were carried out using a system comprising a magnetisation circuit including a signal waveform source, an amplifier and a matching transformer and two high precision multimeters in order to monitor the primary current and secondary induced voltage [1]. Digitised voltage data from the multimeters is analysed using LabVIEWä to obtain magnetic properties of the test specimen.

            Artificial neural networks (ANN) and MATLAB® Curve Fitting ToolboxTM are also used to analyse data obtained from the measurements in prediction and calculation of magnetic properties of these cores [2]. A simple analytical equation as depending on experimental results for each core tested for a certain material has been determined. The results obtained by using the proposed ANN model and analytical equations are in good agreement with experimental results.



1. N. Derebasi, R. Rygal, A. J. Moses, D. Fox, “A novel system for rapid measurement of high-frequency magnetic properties of toroidal cores of different sizes”, J. Magn. Magn. Mat. vol. 215, pp. 684-686, 2000.

2. N. Derebasi, “Effect of geometrical factors on magnetic induction distribution of toroidal cores using numerical methods”, J. Supercond. Nov. Magn. vol. 28, no. 3, pp. 767-771, 2015.