Eddy-Current Effects In Magnetic Design (Part 4): Dowell's Formula

Focus:

Part 4 of this series examines Dowell's equation to gain an understanding of how it illustrates the impact of skin effect and proximity effect at different frequencies by plotting wire resistance (FR) for different numbers of wire layers over frequency. This analysis will lead to some conclusions about where (in the frequency range) skin effect or proximity effect dominates, and how the physical winding of the transductor (spacing of turns and number of layers) affects the accuracy of Dowell's formula.

What you’ll learn:

• How to interpret Dowell's formula and the corresponding plots of wire resistance for transformers and coupled inductors
• How to use Dowell's formula to understand skin effect and proximity effect in transformers and coupled inductors

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Author & Publication:

Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, Jan 16 2017

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