Journal ArticleDOI
Computationally efficient winding loss calculation with multiple windings, arbitrary waveforms, and two-dimensional or three-dimensional field geometry
TLDR
The squared-field-derivative method for calculating eddy-current (proximity effect) losses in round-wire or litz-wire transformer and inductor windings is derived in this paper.Abstract:
The squared-field-derivative method for calculating eddy-current (proximity-effect) losses in round-wire or litz-wire transformer and inductor windings is derived. The method is capable of analyzing losses due to two-dimensional and three-dimensional field effects in multiple windings with arbitrary waveforms in each winding. It uses a simple set of numerical magnetostatic field calculations, which require orders of magnitude less computation time than numerical eddy-current solutions, to derive a frequency-independent matrix describing the transformer or inductor. This is combined with a second, independently calculated matrix, based on derivatives of winding currents, to compute total AC loss. Experiments confirm the accuracy of the method.read more
Citations
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Proceedings ArticleDOI
A Fast Non-Iterative Design Approach of One-Turn Inductor with Significant AC Flux using Commercially Available Components
TL;DR: In this paper , a design methodology is introduced to select a minimum core volume and an optimum litz wire size for a one-turn inductor with significant AC flux, which is designed to meet a specific loss or size constraint.
DissertationDOI
méthodologie de conception et optimisation d'actionneurs intégrés sans fer
TL;DR: A suite of discretized analytical models allowing for the design and the optimization of a no-ferromagnetic integrated electromechanical actuator is proposed, and an arbitration between computing time, degree of complexity, and the precision of the results is allowed.
Proceedings ArticleDOI
A high accuracy regressive-derived winding loss calculation model for high frequency applications
M. A. Bahmani,Torbjorn Thiringer +1 more
TL;DR: In this article, the effect of different geometrical parameters at a wide range of frequencies was investigated in order to propose a pseudo-empirical formula for winding loss calculation in high frequency transformers.
Proceedings ArticleDOI
An AC resistance optimization method applicable for inductor and transformer windings with full layers and partial layers
TL;DR: In this paper, an ac resistance optimization method applicable for both inductor and transformer windings with full layers sand partial layers is proposed, which treats the number of layers of the windings as a design variable instead of as a predefined parameter.
Journal ArticleDOI
EMC-Aware Design of a Planar Inductor for Low-Profile OLED Drivers
Jurica Kundrata,Adrijan Baric +1 more
TL;DR: In this article, a planar inductor used in a low-profile organic light-emitting diode driver for large-area lighting is presented, which takes into account both the buck converter requirements and the electromagnetic compatibility issues.
References
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Journal ArticleDOI
Effects of eddy currents in transformer windings
TL;DR: In this article, the effect of eddy currents on transformer windings is considered and a method is derived for calculating the variation of winding resistance and leakage inductance with frequency for transformers with single-layer, multilayer and sectionalised windings.
Journal ArticleDOI
Optimal choice for number of strands in a litz-wire transformer winding
TL;DR: In this paper, the number and diameter of strands to minimize loss in a litz-wire transformer winding is determined, and a power law to model insulation thickness is combined with standard analysis of proximity effect losses to find the optimal stranding.
Journal ArticleDOI
Improved analytical modeling of conductive losses in magnetic components
TL;DR: In this paper, the authors propose an orthogonality between skin effect and proximity effect to calculate the AC resistance of round conductor windings, which gives more accurate answers than the basic one-dimensional method because the exact analytical equations for round conductors can be used.
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.