Accuracy evaluation of litz wire resistance by using transformer analysis module

Masato Kabetani
Electronics Division Engineering Department, Toyota Industries Corporation,


The demand to make power components in vehicles even smaller brings about key design challenges, such as iron loss reduction and heat dissipation improvements in order to address resulting heating issues.
Utilizing litz wires are effective way to reduce coil loss, but coils exceeding 100 wires are nearly impossible to model and analyze. Realistically, transformer study functions are utilized, which offer approximately the same results as stranded wires.
In this presentation, we will discuss evaluating coil resistance when design parameters such as gap length are assigned.

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