The layer copper factor, although widely used and useful, has no theoretical base SMPS transformers

摘要

In 1D analytical models aimed at calculating ohmic losses in magnetic devices subject to high-frequency effects, the "layer copper factor" is classically used to take layers composed of several conductors into account. The authors show that this well-known factor, introduced by Dowell in 1966, has no theoretical base due to an error in Dowell's original demonstration. However it is re-interpreted as an empirical correcting factor modeling 2D effects of the fields.