The formula used in this calculation is from the famous Wheelers approximations which is accurate to <1% if the cross section is near square shaped. L (uH) =31.6*N^2* r1^2 /…
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Flat spiral air core inductor design calculator
This is an popular coil geometri used in todays wireless charger circuits. The formula used in this calculation is based on the Harold A. Wheeler approximations for air core flat…
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The first approximation is based on a modification of an expression developed by Wheeler; the second is derived from electromagnetic principles by approximating the sides of the spirals as current-sheets;…
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