Journal Article10.1109/TPEL.2003.810839
A multiwinding modeling method for high frequency transformers and inductors
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TL;DR: In this paper, the authors presented a method to obtain an electric model for transformers and inductors, including both frequency and geometry effects in the windings, which can be linked with existing core models.
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Abstract: This paper presents a method to obtain an electric model for transformers and inductors, including both frequency and geometry effects in the windings, which can be linked with existing core models. One-dimensional distributions for magnetic and electric fields are assumed, and from Maxwell's equations an equivalent electric circuit is easily obtained. This equivalent circuit has been included in analog simulators (Spice, AnalogWorkBench, Saber ...), and comparisons between measured and simulated results are shown, both in time domain and in AC sweep, which verify the model accuracy. The model described in this paper allows designers to deal with key issues in the design of high-frequency magnetic components (copper losses, leakage inductance, skin and proximity effects) by using analog simulators, which are usually more familiar to them than finite-element analysis tools.
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Citations
A Systematic Approach to Modeling Impedances and Current Distribution in Planar Magnetics
Minjie Chen,Mohammad Araghchini,Khurram K. Afridi,Jeffrey H. Lang,Charles R. Sullivan,David J. Perreault +5 more
TL;DR: In this paper, the modular layer model (MLM) is proposed to model planar magnetics based on a lumped circuit model, which captures skin and proximity effects and enables accurate predictions of impedances, losses, stored reactive energy, and current sharing among windings.
A systematic approach to modeling impedances and current distribution in planar magnetics
Minjie Chen,Mohammad Araghchini,Khurram K. Afridi,Jeffrey H. Lang,Charles R. Sullivan,David J. Perreault +5 more
- 22 Jun 2014
TL;DR: In this paper, a lumped circuit model was developed to capture the impact of skin and proximity effects on current distribution and electromagnetic fields in planar magnetics, which enables accurate predictions of impedances, losses, stored reactive energy and current sharing among parallel windings.
Optimized Winding Layout for Minimized Proximity Losses in Coils With Rod Cores
TL;DR: In this article, the authors calculate the winding losses of inductors with rod cores, taking into account the two-dimensional field distribution at the wire positions as well as the magnetic fields caused by the eddy currents in adjacent windings.
52
Patent
Mutual inductance extraction using dipole approximations
Roberto Suaya,Rafael Escovar,Salvador Ortiz +2 more
- 23 Feb 2009
TL;DR: In this article, various methods for analyzing mutual inductance in an integrated circuit layout are disclosed, and a circuit description indicative of the layout of signal wires and ground wires in the circuit is received.
41
Transfer functions of a transformer at different values of coupling coefficient
TL;DR: The low- and mid-frequency model of the transformer with resistive load is analysed and it is shown that the transformer efficiency is maximum at any coupling coefficient if the input resistance is equal to the load resistance.
31
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P.L. Dowell
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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.
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A novel approach for minimizing high-frequency transformer copper losses
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TL;DR: In this article, a graphical and numerical method of calculating and minimizing losses in windings, that generalizes previous findings, has been introduced using electromagnetic theory and MMF diagrams in both space and time.
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AC resistance of planar power inductors and the quasidistributed gap technique
Jiankun Hu,Charles R. Sullivan +1 more
TL;DR: In this paper, a model for low-AC-resistance planar or foil-wound inductors constructed using a quasidistributed gap comprising multiple small gaps that approximate a distributed gap is presented.
A full procedure to model high frequency transformer windings
R. Asensi,J.A. Cobos,O. Garcia,Roberto Prieto,J. Uceda +4 more
- 20 Jun 1994
TL;DR: In this article, a finite element analysis (FEA) tool is used to compute the frequency behavior of the windings, taking into account geometry and frequency effects, like skin, proximity, interleaving, gap and end effects.
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