Proceedings ArticleDOI
A practical, accurate and very general core loss model for nonsinusoidal waveforms
W.A. Roshen
- Vol. 2, pp 1308-1314
TLDR
In this paper, 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.Abstract:
Nonsinusoidal voltage waveforms are quite common in high frequency power conversion magnetics. Low frequency nonsinusoidal waveforms are also common in AC motor applications with waveforms such as PWM and six-step. Previous attempts to model these losses, based on Steinmetz equation, can work only in a limited range of frequencies, flux density excitations and waveforms. In this paper we present a very practical, yet very general and accurate model, for core loss calculations in case of nonsinusoidal voltage waveforms. We show the model is equally applicable to low and high frequencies, metallic as well as nonmetallic (e.g. ferrites) core materials, by comparing the model prediction with measured data for various waveforms, frequencies, and flux densities. The model can be used for the design of high frequency transformers and inductors for use in switched mode power supplies. The model can also be used for AC motors where it is hard to estimate `Derating Factor' and to avoid uncontrolled temperature riseread more
Citations
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Journal ArticleDOI
A Bidirectional DC–DC Converter for an Energy Storage System With Galvanic Isolation
S. Inoue,Hirofumi Akagi +1 more
TL;DR: In this paper, a bidirectional dc-dc converter suitable for an energy storage system with an additional function of galvanic isolation is presented, where an electric double layer capacitor is directly connected to a dc side of the converter without any chopper circuit.
Journal ArticleDOI
Switching Control Strategy to Minimize Dual Active Bridge Converter Losses
TL;DR: In this article, a switching control strategy to control the power flow and minimize the total power losses of the dual active bridge converter topology is proposed, which consists of driving the bridge with the largest DC voltage to generate a three-level pulsewidth-modulated (PWM) voltage waveform.
Journal ArticleDOI
Optimal Design and Tradeoff Analysis of Planar Transformer in High-Power DC–DC Converters
TL;DR: An improved interleaving structure with optimal behaviors is proposed, which constructs the top layer paralleling with the bottom layer and then in series with the other turns of the primary, so that a lower magnetomotive force ratio m can be obtained, as well as minimized ac resistance, leakage inductance, and even stray capacitance.
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 Bidirectional Three-Level DC–DC Converter for the Ultracapacitor Applications
TL;DR: A three-level nonisolated dc-dc converter as a candidate for ultracapacitor applications is proposed and analyzed and experimentally verified on a general-purpose controlled electric drive.
References
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Journal ArticleDOI
General properties of power losses in soft ferromagnetic materials
TL;DR: In this paper, the authors measured the loss per cycle (sinusoidal flux waveform) versus magnetizing frequency f/sub m/(0 > 0) for a single cycle.
Journal ArticleDOI
Calculation of the Energy Loss in Magnetic Sheet Materials Using a Domain Model
R. H. Pry,C. P. Bean +1 more
TL;DR: In this article, the energy loss resulting from eddy currents was calculated for magnetic sheet materials with a simple domain configuration, and the results were in a form more suitable for quantitative comparison with measured values on materials, such as grain oriented silicon iron, than have been available.
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.
Journal ArticleDOI
Studies of the Propagation Velocity of a Ferromagnetic Domain Boundary
TL;DR: In this paper, the velocity of propagation of a single domain boundary in a crystal of silicon iron with a simple domain structure is given by a relation of the form $v=G(H\ensuremath{-}{H}_{0})$, where $G$ is a constant and H is the starting field.
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.