An Improved Double-2D Electromagnetic Simulation Methodology for Winding Loss Analysis of High-Frequency Magnetic Components

Abstract

Precise and efficient winding loss calculation is critical for optimizing high-frequency magnetic components. While three-dimensional (3D) finite element method (FEM) provides accuracy, its computational demands limit practical applications. Conventional two-dimensional (2D) FEM, though computationally efficient, fails to balance calculation accuracy and efficiency. This paper develops a double-2D electromagnetic simulation methodology achieving 3D-equivalent accuracy through magnetic potential equivalence in the air gap location. The proposed double-2D approach can be applied to common core structures such as EE, EC, and others: (1) Synthesis modeling for symmetric structures. (2) Magnetic potential compensation for complex asymmetric structures. A deviation of less than 5% from the measured results is achieved over the frequency range of 10 kHz to 1 MHz, and a 130-fold acceleration was achieved, resolving the accuracy-efficiency trade-off in 3D FEM simulations. The proposed double-2D simulation technique provides practical significance for high-frequency magnetic device design, particularly in GaN-based power delivery.