Transformers Magazine, Vol. 2 No. 1, 2015.
Original scientific paper
Magnetic component design
Peter Markowski
; Envelope Power LLC
Abstract
AC currents in multiple layers in the transformer window can increase copper losses significantly due to the proximity effect. Traditionally used Dowell’s curves show that the phenomenon starts at copper thickness as low as 1/5 of the skin depth which is just 1.7 mm at 60 Hz. Many designs deviate from assumptions beyond Dowell’s solution, which leads to suboptimal design. Finite Element Analysis software allows accurate modelling of high frequency phenomenon but is still considered too tedious to use and requires expert operators for accurate results. New generation products like EMS from EMWorks combine powerful simulation capabilities with easy to use interface appropriate for hands-on engineers in everyday use.
Keywords
Finite Element Analysis; AC copper losses; skin effect; proximity effect
Hrčak ID:
182934
URI
Publication date:
8.1.2015.
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