Authors: Naim Derebaşı
Source: Bursa Uludag University - AVESIS (article, 2021-10-21)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Comparison of magnetic properties of toroidal cores using in aerospace industry <p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">Comparison ofmagnetic properties of toroidal cores using in aerospace industry<o:p></o:p></span></b> <p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">&nbsp;</span></b> <p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">Naim Derebasi<sup>1</sup>and Ismet Gucuyener<sup>2</sup><o:p></o:p></span> <p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">&nbsp;</span> <p class="Affiliations"><sup><span style="font-size:12.0pt;mso-ansi-language:EN-GB;mso-bidi-font-style:italic">1</span></sup><i><span lang="EN-US" style="font-size:12.0pt"> Physics Department, Uludag University, Gorukle Bursa,16059, Turkey<o:p></o:p></span></i> <p class="MsoNormal" align="center" style="text-align:center"><sup><span lang="EN-US" style="font-size:12.0pt;mso-ansi-language:EN-US">2</span></sup><span lang="EN-US" style="font-size:12.0pt;mso-ansi-language:EN-US"> <i>Vocation School of Technical Science, UludağUniversity, Gorukle Bursa, 16059, Turkey</i><o:p></o:p></span> <p class="MsoNormal"><span style="font-size:11.0pt;mso-bidi-font-size:10.0pt">&nbsp;</span> <p class="MsoNormal" style="text-align:justify;text-indent:36.0pt"><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">Power loss, permeability,remenance, coercivity of cores at medium magnetising frequencies are becomingan important economic, efficiency and performance consideration in the designof power conversation equipment at aerospace industry. Performance requirementsvary widely in traditional and emerging materials. This choice is often mademore difficult because of a lack of suitable comparative magnetic data measuredunder medium frequency magnetisation condition. Grain oriented 3% SiFe istraditionally used widely, however recent competing materials with improvedmagnetic properties are being produced but very few direct comparison ofmagnetic properties have been reported.<o:p></o:p></span> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Inthis research direct comparison of ac properties of toroidal cores made fromwound grain oriented, amorphous and nano-crystalline strip materials cores. Measurementswere carried out using a system comprising a magnetisation circuit including asignal waveform source, an amplifier and a matching transformer and two highprecision multimeters in order to monitor the primary current and secondaryinduced voltage [1]. Digitised voltage data from the multimeters is analysedusing LabVIEW</span><sup><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt;font-family:Symbol;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;mso-char-type:symbol;mso-symbol-font-family:Symbol">ä</span></sup><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt"> to obtain magnetic propertiesof the test specimen.<o:p></o:p></span> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size:12.0pt">Artificial neural networks (ANN) and MATLAB<sup>®</sup> Curve Fitting Toolbox</span><sup><span style="font-size:11.0pt;mso-bidi-font-size:12.0pt;mso-bidi-font-weight:bold">TM</span></sup><span style="font-size:12.0pt;mso-bidi-font-weight:bold"> </span><span style="font-size:12.0pt">are also used to analyse data obtained from themeasurements in prediction and calculation of magnetic properties of thesecores [2]. A simple analytical equationas depending on experimental results for each core tested for a certainmaterial has been determined. The results obtained by using the proposedANN model and analytical equations are in good agreement with experimentalresults.</span><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt"><o:p></o:p></span> <p class="MsoNormal"><span style="font-size:12.0pt;mso-bidi-font-size:10.0pt">&nbsp;</span> <p class="MsoNormal"><b><span style="font-size:12.0pt">References<o:p></o:p></span></b> <p class="Text" style="text-indent:0cm"><span lang="EN-US" style="font-size:12.0pt;line-height:105%">1. N. Derebasi, R. Rygal, A. J. Moses, D. Fox, “A novelsystem for rapid measurement of high-frequency magnetic properties of toroidalcores of different sizes”, J. Magn. Magn. Mat. vol. 215, pp. 684-686, 2000.<o:p></o:p></span> <p class="Text" style="text-indent:0cm;line-height:normal"><span lang="EN-US" style="font-size:12.0pt">2. N. Derebasi, “Effect of geometrical factors onmagnetic induction distribution of toroidal cores using numerical methods”, J.Supercond. Nov. Magn. vol. 28, no. 3, pp. 767-771, 2015.<o:p></o:p></span> <p class="MsoNormal"><span style="font-size:12.0pt">&nbsp;</span> Toroid ; Aerospace ; Waveform ; Magnetization ; Voltage ; Transformer ; Magnet ; Coercivity ; Amorphous solid Magnetic Properties and Applications ; Thermal Analysis in Power Transmission ; Magnetic and Electromagnetic Effects