INVESTIGATION OF CURRENT DENSITY, MAGNETIC FLUX DENSITY, AND OHMIC LOSSES FOR SINGLE-VEINED, LITZ AND FOIL STRUCTURED CONDUCTORS AT DIFFERENT FREQUENCIES

Yıl 2013, Cilt: 19 Sayı: 5, 195 - 200, 01.05.2013

Serdal Arslan İlhan Tarımer Mehmet Emin Güven

https://doi.org/10.5505/pajes.2013.36844

Öz

Today, although medium and high frequencies have been provided a significant reduction in the size of machine, it is known that as the more frequency increases, the higher losses at conductors. In this study, wire losses of the same cross section but different structures are examined by finite elements method. Also, depending on the exchange rate in wires at conductors, changes of current density, magnetic flux density and ohmic losses were investigated. The use of different structured wires of conductors at different frequencies has been compared in terms of their losses, and given the graphics regarding to the design by special design software.

Anahtar Kelimeler

Conductor, Wire, Skin effect, Litz and foil conductor, Conductor losses.

FARKLI FREKANSLARDAKİ TEK-DAMARLI, LİTZ VE FOLYO YAPILI İLETKENLERİN AKIM YOĞUNLUĞU, MANYETİK AKI YOĞUNLUĞU VE OMİK KAYIPLARININ ARAŞTIRILMASI

Öz

Günümüzde, orta ve yüksek frekanslar, makine boyutunda önemli derecede küçülme sağlamasına rağmen bu frekanslardan kaynaklanan kayıpları da beraberinde getirmektedir. Elektrik makinalarında meydana gelen kayıplar özel sargı tasarımları ile azaltılabilmektedir. Bu çalışmada aynı kesitteki tek damarlı iletken, litz iletken ve bakır folyo iletken kayıpları sonlu elemanlar yöntemi ile incelenmiştir. Ayrıca frekansın değişimine bağlı olarak iletkenlerdeki akım yoğunluğu, manyetik akı yoğunluğu ve omik kayıplar bir tasarım programı yardımıyla incelenmiş ve elde edilen grafikler verilmiştir.

Anahtar Kelimeler

İletken, Tel, Deri etkisi, Litz ve folyo iletkeni, İletken kayıpları.

Kaynakça

• Moses, J., " Iron-based Amorphous ribbon– challenges and opportunity for power applications", Journal of Optoelectronics and Advanced Materials, Vol. 4, nr 2, 231–236, 2002.
• Ansoft v14, Eddy current solution help file, http://softwaretopic.informer.com/ansoft-maxwell- tutorial-free/ October 2012.
• Ferreira, J. A., "Improved analytical modeling of conductive losses in magnetic components", IEEE Transactions Power Electronics, nr 1, 127–131, 1994.
• http://www.newenglandwire.com/litz.asp, 31.08.2012.
• Sullivan, C. R., McCurdy, J. D., and Jensen, R. A., “Analysis of minimum cost in shape-optimized litz-wire inductor windings”, IEEE Power Electronics Specialists Conference, Vol. 3, 1473–1478, 2001.
• Gersem, H. D., Hameyer, K., “A Finite element model for folio winding simulation”, IEEE Transactions on Magnetics, Vol. 37–5, 3427–3432, 2001,
• Pollock, J. D., Sullivan, C.R., “Loss models for shaped folio windings on low–permeability cores”, IEEE Power Electronics Specialists Conference, 3122–3128, 2008.
• Dowell, P. L., “Effects of eddy currents in transformer windings”, Proceedings of the IEE, nr 8, 1387–1394, 1996.
• Odendaal, W.G., Ferreira, J. A., Cronje, W.A., “Combined numeric and analytic methods for folio winding design”, Power Electronics Specialists Conference, PESC '94, 25th Annual IEEE June 1994, 843–849, 1994.
• Fu, W.N., Zhou, P., Lin, D., Stanton, S., Cendes, Z.J., “Modeling of solid conductors in two-dimensional transient finite–element analysis and its application to electric machines”, IEEE Transactions on Magnetics, Vol. 40, nr 2, 426–434, 2004.
• De Gersem, H., Hameyer, K., “A Multi–conductor model for Eddy finite element current simulation”, IEEE Magnetics, Transactions on,
• Wang, S., Rooij, M.A., Odendaal, W.G., Daniel van Wyk, Fellow, J., and Boroyevich, D., “Reduction of high- frequency conduction losses using a planar litz structure”, Power Electronics, IEEE Transactions on, Vol. 20 , Issue 2, pp. 261–267, 2005.
• Fenercioğlu, A., Tarımer, İ., ”Solution processes of a magnetic system’s magneto static analysis with Maxwell 3D field simulator”, Selçuk University Journal of Technical-Online, ISSN 1302/6178, Vol. 6, No. 3, pp. 221–240, 2007.
• Driesen, J., Deliege, G., Belmans, R., “Hameyer, K. “Coupled thermo-magnetic simulation of a foil-winding transformer connected to a nonlinear load”, Magnetics, IEEE Transactions on, Vol. 36, Issue 4, pp. 1381–1385, 2000.