Example of estimation of proximity effect from Dowell curves. Knowing the value of the wire diameter and frequency it is possible to calculate skin depth and then frequency factor Q, which then can be used as the input variable in the graph (horizontal axis) and traversing to the given curve of the number of layers in the winding the resulting K factor can be read out.
See also: Calculator of proximity effect from Dowell curves.
The curves are calculated by following the original Dowell paper:
proximity_factor_example_e-m.png
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