Research Group H.Pfützner
The research group
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Edin MULASALIHOVIC, Dr. (analyses, CV) Helmut PFÜTZNER, Prof. (analyses & modelling, CV) Georgi SHILYASHKI, Dr. (magnetostriction & modelling, CV) | |
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Experiments & Computing |
Completed projects
FWF Project: Saturation Effects of Power Transformer Cores Caused by Geomagnetic Storms
Contacts
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Why to study magnetism?
- since it is a complex, challenging field of science with ultimum range of scopes – from interaction of spins, up to transformer cores of 500 tons mass
- since industry shows high demand that hardly is fulfilled in Austria—in contrast to thousands of experts in Japan
Thematics
Basic measurements
by means of high-field electromagnet, on bar/cylinder samples
- B/H correspondences
- saturation tests
- sensor calibration
by means of advanced Epstein tester, on strip samples
- B/H correspondences
- loss measurements
- magnetostriction measurements
by means of rotational single sheet tester on plate samples
- B/H correspondences
- loss measurements
- magnetostriction and strain measurements
- domain studies
Model core investigations
- surface analyses of local distributions of flux density, field, losses, magnetostriction, vibrations and sound
- interior analyses of 3-D distributions of losses and field
Magnetic sensors
- combined detectors for in-plane/off-plane flux and eddy current losses
- bilayer sensors for temperature and curvature
- biomedical bilayer sensors for respiratory and cardiac activities
Specific current research work
- transformer core saturation as caused by geomagnetic storms
- effects of package design on core performance
- effects of off-plane flux on material characteristics
- application of 3-D printing on magnetic sensors
Examples of apparatus
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Rotational single sheet tester for the generation of exactly defined 2-dimensional magnetization patterns |
| Transformer model core for the study of 3-dimensional interactions of individual packages |  |
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High-energy magnet for optical observation of material deformations due to strong static fields |
| Combined 3D/2D printer for automatic manufacturing of thin sensors including amorphous soft-magnetic ribbons |  |
Examples of results
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Domains under the influence of off-plane field components |
| Rhombic rotational magnetization patterns in a T-joint region |  |
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2-dimensional distribution of power losses in a model transformer core |
| Instantaneous stray field configuration under the influence of DC bias |  |
Selected recent publications
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H.Pfützner, E.Mulasalihovic, H.Yamaguchi, D.Sabic, G.Shilyashki, F.Hofbauer: Rotational magnetization in transformer cores – A review. IEEE Trans. Magn. 47, 4523‐ 4533 (2011) |
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H.Pfützner, G.Shilyashki, F.Hofbauer (Guest Eds.): Proc. 12th Int. WS 1&2‐Dimensional Magnetic Measurement & Testing. In: J.Appl.Electrom.Mech. 44, Nos. 3,4 (2014) |
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G.Shilyashki, H.Pfützner, J.Anger, K.Gramm, F.Hofbauer, V.Galabov, E.Mulasalihovic: Magnetostriction of transformer core steel considering rotational magnetization. IEEE Trans. Magn.50, 8400115, 1‐15 (2014) |
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V.Galabov, H.Pfützner, G.Shilyashki, H.Yamaguchi, Y.Okazaki, S.Arrai: Domain reconstructions of g.o. SiFe during rotational magnetization with DC bias. J.Appl. Electrom. Mech. 44, 417‐428 (2014) |
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F.Hofbauer, H.Pfützner, G.Shilyashki, D.Sabic, E.Mulasalihovic, V.Galabov: Rise‐of‐temperature method for building factor distribution in 1‐phase model transformer core interior considering high DC bias. J.Appl.Electrom.Mech.44, 349‐354 (2014) |
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H.Pfützner, G.Shilyashki, P.Hamberger, M.Aigner, F.Hofauer, M.Palkovits, E.Gerstbauer, I.Matkovic, V.Galabov: Automatic 3‐dimensional building factor analysis of a grain oriented model transformer core. IEEE Trans.Magn.50, 8400 604, 1‐4 (2014) |
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G.Shilyashki, H.Pfützner, P.Hamberger, M.Aigner, F.Hofbauer, I.Matkovic, A.Kenov: The impact of off‐plane flux on losses and magnetostriction of transformer core steel. IEEE Trans.Magn. 50-11 (2014) |
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G.Shilyashki, H.Pfützner, E.Gerstbauer, G.Trenner, P.Hamberger, M.Aigner: Numerical prediction of rhombic rotational magnetization patterns in a transformer core package. IEEE Trans.Magn., DOI: 10.1109/TMAG.2015.2470217, (2015) .Acknowledgements for fundsThanks for current funding go to
Cooperation partnerswith common publications
Teaching activitiesBachelor theses, diploma theses, doctor theses Lectures - “Applied Magnetism”, |