Winding Loss Modeling for Toroidal Magnetics – Including Gapped Cores

Frenetic Webinar: Winding Loss Modeling for Toroidal Magnetics – Including Gapped Cores

Wednesday, May 13, 5:00 PM – 5:30 PM CET

Toroidal magnetics are widely used in power electronics thanks to their compact geometry and low stray fields. However, accurately predicting winding losses becomes significantly more difficult when introducing air gaps, non-uniform windings, or arbitrary layouts.

In this webinar, Jonas Mühlethaler will present a practical winding-loss modeling approach recently introduced at APEC 2026. The method extends the well-known mirroring technique to handle gapped toroids and complex winding arrangements, scenarios where traditional 1D or uniform-winding models are no longer sufficient.

The session will explore how this approach can achieve FEM-level accuracy (within approximately 6%) without the computational burden of running full FEM simulations.

Topics covered include:

• Modeling winding losses in gapped toroids
• Common Mode Chokes (CMCs) and toroidal transformers
• Arbitrary winding layouts
• Extensions to the classic mirroring method
• Accuracy comparison versus FEM simulations
• Practical implications for high-frequency magnetic design

This webinar is especially relevant for engineers working on high-frequency magnetics, power converters, and advanced magnetic modeling workflows.