Numerical Modeling of Capacitive Effects in HF Multiwinding Transformers—Part I: A Rigorous Formalism Based on the Electrostatic Equations

This paper is the first part of a work which aims at proposing a global approach for the numerical modeling of parasitic capacitances in high-frequency multiwinding transformers. In this first part, various capacitive circuits of n-winding magnetic components are presented. Careful attention is paid to the definition of a rigorous mathematical formalism based on the electrostatic equations, valid for any number of windings. The numerical identification of the proposed circuits is discussed in a companion paper.