Planar Transformer Capacitance Extraction using Ansys Maxwell A-phi Solver

This tutorial demonstrates the application of AC Magnetic A-phi solver for planar transformer parasitic capacitance calculations (winding self-capacitance and turn-to-turn capacitance). Detailed simulation procedures, setup configurations, and results are provided, along with a comparison between the AC Magnetic A-phi solver and the Electrostatic Solver. This tutorial also highlights the different assumptions adopted by the two solvers in capacitance calculations and discusses their impact on simulation results. It is particularly valuable for engineers and researchers working in consumer electronics and power electronics. 

Learning Outcomes:

Following completion of this course, you will be able to:

• Create planar transformer model for Ansys Maxwell® advanced electromagnetic field solver EM analysis in AC Magnetic A-phi solver.
• Develop proficiency in configuring pre-processing setup, such as capacitance matrix assignment, and post-processing field plots.
• Identify and analyse parasitic capacitances (winding self-capacitance and turn-to-turn capacitance) as well as magnetic core saturation in planar transformer.
• Understand the assumptions for capacitance computation between AC Magnetic A-phi and Electrostatic solvers.

Prerequisites:

• Ansys Maxwell Getting Started.
• Knowledge of transformer winding capacitance is helpful.

Please note: These training materials were developed and tested in the 2026R1 release.