Journal ArticleDOI
Inductor winding loss owing to skin and proximity effects including harmonics in non-isolated pulse-width modulated dc-dc converters operating in continuous conduction mode
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TLDR
In this article, a general expression for winding loss (copper loss) including harmonics for an inductor carrying periodic non-sinusoidal current is presented, where the skin and proximity effects are taken into account.Abstract:
A general expression for winding loss (copper loss) including harmonics for an inductor carrying periodic non-sinusoidal current is presented. The skin and proximity effects are taken into account. Expressions for amplitudes of inductor current harmonics are derived and illustrated as functions of duty cycle for selected non-isolated converters namely buck, boost and buck-boost converters. An example of inductor design procedure using the area-product method is shown for a buck converter operating in continuous conduction mode (CCM). The amplitude spectra of the inductor current, winding resistance and winding power loss are illustrated. Inductor winding losses in the designed inductor are analysed using MatLab simulations. Experimental results using the designed inductor are also presented.read more
Citations
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Journal ArticleDOI
Winding resistance of litz-wire and multi-strand inductors
TL;DR: In this paper, an approximate model for multi-strand wire winding, including litz-wire winding, is presented, which takes into account the existence of proximity effect within the litzwire bundle between the strands and between the bundles, as well the skin effect.
Journal ArticleDOI
Analytical Optimization of Solid–Round-Wire Windings
TL;DR: New closed-form analytical equations are derived for the normalized solid-round-wire diameter to achieve minimum ac winding losses for sinusoidal current that enable inductor and transformer designers to minimize winding loss without utilizing finite-element method analysis.
Journal ArticleDOI
The Three-Phase Common-Mode Inductor: Modeling and Design Issues
TL;DR: This paper presents a comprehensive physical characterization and modeling of the three-phase common-mode (CM) inductors along with the equivalent circuits that are relevant for their design.
Journal ArticleDOI
Derivation and Scaling of AC Copper Loss in Thermal Modeling of Electrical Machines
TL;DR: Methods of deriving the Rac/Rdc ratio, together with scaling techniques of the ac winding loss accounting for thermal effects, are discussed and an experimental approach based on tests on full-scale stator assemblies is proposed.
Journal ArticleDOI
Contribution of End-Winding Proximity Losses to Temperature Variation in Electromagnetic Devices
TL;DR: An investigation into proximity losses in end-windings informed from 3-D finite-element analysis of an ac power inductor finds that the effects within the end-winding while significant are lower compared to those with the active length of the conductors.
References
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Book
Transformer and inductor design handbook
TL;DR: In this paper, the authors present a theoretical analysis of transformer-inductor design, including the following: AC Inductor Design Powder Core. DC Inductor design Gap Core. Forward Converter Transformer and Inductor Development.
Book
Pulse-width modulated DC-DC power converters
TL;DR: In this paper, the authors present a classification of power supplies in DC-DC Converters, including voltage, current, voltage, energy, and power, and discuss the relationship among them.
BookDOI
Pulse-Width Modulated DC-DC Power Converters: Kazimierczuk/Pulse-width Modulated DC-DC Power Converters
Journal ArticleDOI
Optimizing the AC resistance of multilayer transformer windings with arbitrary current waveforms
TL;DR: In this article, the authors present a new formula for the optimum foil or layer thickness, without the need for Fourier coefficients and calculations at harmonic frequencies, which is simple, straightforward and applies to any periodic wave shape.
Journal ArticleDOI
Optimized transformer design: inclusive of high-frequency effects
TL;DR: In this article, the physical and electrical properties of the transformer form the basis of a new design methodology while taking full account of the current and voltage waveforms and high-frequency effects.