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A Novel Approach for 3D Air Gap Reluctance Calculations
J. Muhlethaler,J. W. Kolar,A. Ecklebe 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
An approach to accurately calculate the reluctance of an air gap is introduced. The approach is easy to handle as it is based on a modular concept where a simple basic geometry is used as a building block to describe different three dimensional air gap shapes. A high degree of accuracy is achieved as the approach is based on an analytical field solution.
Loss Modeling of Inductive Components Employed in Power Electronic Systems
J. Muhlethaler,J. W. Kolar,A. Ecklebe 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
Loss models of inductive components are thoroughly investigated, thereby all different aspects of loss modeling are considered. The impact of peak-to-peak flux density ?B, frequency f, DC premagnetization HDC, temperature T, core shape, minor and major loops, flux waveform, and material on core loss calculation are considered. In order to calculate winding losses, formulas for round conductors and litz wires, each including skin- and proximity effects (including the influence of an airgap fringing field) are included. A high level of accuracy is achieved by combining the best state-of-the-art approaches and by embedding newly-developed approaches into a novel loss calculation framework. The loss models are verified by FEM simulations and experimental measurements.