A New Method Of Winding Design Optimization (Part 3): Magnetic Operating Points For Toroidal Windings

Focus:

In part 2 of this article, the magnetic operating points (op-pts) useful for winding design were identified and derived for linear layering (constant turns per layer, Nl). To complete the set of winding design formulas, corresponding equations for toroidal windings are included in this part 3. They are similar to those for linear layering, but are constrained by the maximum number of layers for a toroid, and wire insulated radius, rcw. These design formulas are also harder to derive, and though the reader is spared much of the math, the resulting formulas presented here require more calculator button-pushing. Yet even for toroids, an optimal winding design can be achieved using a calculator. The equations are, of course, also suitable for a computer math program such as Mathcad or Matlab.

What you’ll learn:

• How to calculate ξr operating point values corresponding to minimum winding losses in toroidal transformer and inductor design

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Author & Publication:

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

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