How Wire Bundle Configurations Influence Eddy-Current Proximity Effects

Focus:

Eddy-current proximity effects can be estimated and simplified for calculator-based transformer design for different wire-bundle configurations. This article describes bundling and how it influences the proximity effect, both between bundles (interbundle) and within bundles (intrabundle). The author begins by explaining bundle packing factors and twist factor as these will be important in the determination of proximity effects and the calculation of eddy-current losses and winding resistance. He also explains conceptually how the number of strands in a bundle (and whether they are twisted or braided) impact the interbundle and intrabundle proximity effects. This discussion leads to some simple rules for minimizing the proximity effects.

What you’ll learn:

• How to minimize proximity effects when using wire bundles in transformer winding designs

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Author & Publication:

Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, Feb 15 2019

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