Title :
The AC resistance of high frequency transformer lead-outs
Author :
Stadler, Alexander
Author_Institution :
STS Spezial-Transformatoren Stockach GmbH & Co. KG, Stockach, Germany
fDate :
March 31 2014-April 1 2014
Abstract :
In this paper, the AC resistance of transformer lead-outs is investigated. For this purpose, an equivalent complex permeability model is used. It is shown, that the copper losses can be split into DC (RMS), skin and proximity losses. Parallel bundles of insulated strands are assumed for the lead-outs. Hence, the proximity losses are dominated by the inner proximity effect which can be easily calculated by a given approximate formula. Finally, the model is compared to measured data.
Keywords :
high-frequency transformers; permeability; RMS; ac resistance; approximate formula; copper losses; equivalent complex permeability model; high frequency transformer lead-outs; inner proximity effect; insulated strands; parallel bundles; proximity losses; skin losses; Inductive components; cables; copper losses; finite element method (FEM); litz-wire;
Conference_Titel :
Computation in Electromagnetics (CEM 2014), 9th IET International Conference on
Conference_Location :
London
Electronic_ISBN :
978-1-84919-817-2
DOI :
10.1049/cp.2014.0242
