Comparison of Analytical Models of Transformer Leakage Inductance: Accuracy Versus Computational Effort

A fast and accurate model of the transformer leakage inductance is crucial for optimization-based design galvanically isolated converters. Analytical models are fastly executable, therefore, especially suitable such optimizations. This article compares several analytical per unit length with respect to accuracy computational effort. The considered applicable E-Core U-Core transformers. 2D FEM simulations used as a benchmark evaluate accuracy, whereas computation time extracted an indicator Six different prototypes provide geometries comparison. Based on conducted comparisons, Roth's most accurate. Rogowski's fastest low-error model. Margueron's versatile it takes finite permeability core into account. comparisons lay foundation Double-2D modeling executed two main cross sections E-core U-core transformers: inside window, outside window. accompanied by supplementary document summarizing equations