Journal ArticleDOI
Comparative Analysis of Core Loss Calculation Methods for Magnetic Materials Under Nonsinusoidal Excitations
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TLDR
In this article, a brief description about the existing core loss calculation methods for nonsinusoidal excitations is given, and calculation formulas of aforementioned methods for two typical excitation waveforms, that is, square and rectangular with variable duty cycle, are derived.Abstract:
Magnetic components in power electronic equipment usually suffer from nonsinusoidal excitations. In this paper, a brief description about the existing core loss calculation methods for nonsinusoidal excitations is given. Then calculation formulas of aforementioned methods for two typical excitation waveforms, that is, square and rectangular with variable duty cycle ${D}$ , are derived. Core loss of nanocrystalline FT-3KS, under above two nonsinusoidal excitations, is measured on an established test setup. The accuracy and applicability of each method are discussed theoretically and verified experimentally, especially in terms of different duty cycles and frequencies. It is found that the waveform coefficient Steinmetz equation (WcSE) is more applicable for the case of relatively small harmonics content of magnetic field intensity ${H}$ (normal duty cycle region), while the improved generalized Steinmetz equation (IGSE) has better precision where the harmonics count (extreme duty cycle region). In addition, the IGSE can better follow the changing trend of core loss with ${D}$ and have better frequency applicability than WcSE, which is proven to be not valid in low frequency (where the static hysteresis loss dominates). The results can provide reference for core loss prediction under nonsinusoidal excitations.read more
Citations
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Analytical Optimization of Nonsaturated Thermally Limited High-Frequency Transformer/Inductor Design Considering Discreteness of Design Variables
TL;DR: An analytical design methodology for nonsaturated thermally limited high-frequency transformers/inductors with the objective of minimum core size and minimum power loss is proposed and an effective ac resistance factor in terms of all windings is proposed to model the winding loss.
Journal ArticleDOI
Power Losses Models for Magnetic Cores: A Review
Daniela Rodriguez-Sotelo,Martin A. Rodriguez-Licea,Ismael Araujo-Vargas,Juan Prado-Olivarez,Alejandro-Israel Barranco-Gutiérrez,Francisco J. Perez-Pinal +5 more
TL;DR: The use of ferromagnetic materials as substitutes for ferrite, in the core of magnetic components, has been proposed as a solution to this problem, and with them, a new perspective and methodology in the calculation of power losses open the way to new design proposals and challenges to overcome as mentioned in this paper .
Journal ArticleDOI
An Improved Core Loss Model of Ferromagnetic Materials Considering High-Frequency and Nonsinusoidal Supply
Haisen Zhao,Hassan H. Eldeeb,Yanli Zhang,Dongdong Zhang,Yang Zhan,Guorui Xu,Osama A. Mohammed +6 more
TL;DR: In this paper, an improved FEM-based core loss model was proposed, which includes a piecewise variable parameters based hysteresis loss model, an eddy current loss model considering different cross sections of magnetic circuit and supply waveforms, and improved excess loss coefficients.
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An Isolated Multilevel DC–DC Converter Topology With Hybrid Resonant Switching for EV Fast Charging Application
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Optimal peak flux density model (OPFDM) for non-iterative design of high-frequency gapped transformer (HFGT) in LLC resonant converters
Daniyal Ahmed,Li Wang +1 more
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References
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Proceedings ArticleDOI
Accurate prediction of ferrite core loss with nonsinusoidal waveforms using only Steinmetz parameters
TL;DR: An improved calculation of ferrite core loss for nonsinusoidal waveforms separates a flux trajectory into major and minor loops via a new recursive algorithm that is highly accurate and outperforms two previous methods for measured data.
Proceedings ArticleDOI
Calculation of losses in ferro- and ferrimagnetic materials based on the modified Steinmetz equation
TL;DR: In this paper, the influence of nonsinusoidal flux-waveforms on the remagnetization losses in ferro- and ferrimagnetic materials of inductors, transformers and electrical machines used in power electronic applications is discussed.
Proceedings ArticleDOI
Improved calculation of core loss with nonsinusoidal waveforms
TL;DR: An extension to the Steinmetz equation is proposed, to enable estimation of hysteresis losses in magnetic core materials with nonsinusoidal flux waveforms, and the new formulation is shown to avoid anomalies present in previous modified-Steinmetz-equation calculations of loss.
Journal ArticleDOI
Core Losses Under the DC Bias Condition Based on Steinmetz Parameters
TL;DR: In this article, different materials have been tested to gain information on how core losses are influenced by a dc premagnetization, and the Steinmetz graph (SPG) is introduced to calculate core losses under dc bias conditions.
Journal ArticleDOI
A Practical, Accurate and Very General Core Loss Model for Nonsinusoidal Waveforms
TL;DR: In this article, the authors present a very practical, yet very general and accurate model, for core loss calculations in case of nonsinusoidal voltage waveforms, which can be used for the design of high frequency transformers and inductors for use in switched mode power supplies.