ACTA

Influence of Magnetic Field on Dielectric Breakdown in Transformer Oil Based Ferrofluids

M. Rajňák^a, J. Kurimský, B. Dolník^b, K. Marton^b, L. Tomčo^c, M. Molčan^a, P. Kopčanský^a, M. Timko^a
^aInstitute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia
^bFaculty of Electrotechnics and Informatics, Technical University, Letná 9/A, 04121 Košice, Slovakia
^cFaculty of Aviation, Technical University, Rampová 7, 04121 Košice, Slovakia

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In this paper the experimental study of the breakdown field strength in a transformer oil based ferrofluid is reported. The experiments are conducted on five ferrofluid samples with different magnetic volume fraction. The influence of external magnetic field on the breakdown field strength is investigated, when a quasi-homogenous magnetic field was applied in parallel and perpendicular configuration in regard to the electric field. The obtained results are analysed in accordance to the electron charging of ferrofluid nanoparticles theory.

DOI: 10.12693/APhysPolA.126.248
PACS numbers: 75.50.Mm, 77.22.Jp, 75.75.Jn