Current distribution in sheet- and foil-wound transformers

Mullineux, N.; Reed, J.R.; Whyte, I.J.

doi:10.1049/piee.1969.0022

Cited by 16 publications

(5 citation statements)

References 3 publications

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“…The evenly distributed parallelly connected low-voltage coils can be treated as a conductive foil. In [18][19][20], the current distribution in the low-voltage coil presented by a foil is much more similar to current distribution presented here than in [17]. The question arises, why is the current distribution in [17] so wavy?…”

Section: Table A1supporting

confidence: 65%

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Current distribution in the low-voltage winding of the furnace transformer

Stojčić

Miljavec

2012

International Journal of Electrical Power & Energy Systems

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Section: Table A1supporting

confidence: 65%

“…It can now be concluded that the real power P and reactive power Q in (20) can be expressed with the leakage impedance of all the transformer windings and winding currents.…”

Section: N2mentioning

confidence: 99%

Current distribution in the low-voltage winding of the furnace transformer

Stojčić

Miljavec

2012

International Journal of Electrical Power & Energy Systems

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“…of the second order, whose solution[24] is too complicated for use in engineering design. Practically the same results, but much easier, had been obtained years earlier[25] using the well‐known deep‐slot theory (Figure 2).…”

Section: Data Generation and Validation Of Physical Pre‐processor Modelsmentioning

confidence: 99%

Fast computation of coupled fields in complex, 3‐D, industrial electromagnetic structures

Turowski

1998

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Recent progress in the development of electromagnetic field theory and sophisticated software for solution of complicated, non‐linear, 3‐D structures is not always accompanied with relatively cheap and simply presented engineering instructions, easy to use for regular industrial design. In the paper some theoretical and practical examples are given as to how one can get over a excessive calculating difficulties to obtain quickly simple design directions and reduce complicated theory to simple practical conclusions. The fast and cheap package RNM‐3D is validated by comparison with industrial test data and with the interactive graphics system is the final illustration of the effectiveness of such an approach. RNM‐3D is used successfully in many transformer works the world over.

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“…Mullineux et al [7], El-Missiry [8], Ferreira [9], and Zúbek [10] have used analytical solutions to determine the current distribution and losses in foil windings; however, as already mentioned, these methods are based on simplified models, which are not usually sufficiently accurate and flexible for transformer design purposes.…”

Section: Introductionmentioning

confidence: 99%

Semianalytic Integral Method for Fast Solution of Current Distribution in Foil Winding Transformers

Díaz

Mombello

2015

IEEE Trans. Magn.

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A novel mesh-free axisymmetric methodology for the determination of the low-frequency current distribution in foil windings is presented in this paper. The proposed methodology applies equivalent models for the foil winding and the iron core, which are based on the field produced by elementary geometric configurations and boundary conditions derived from Maxwell's equations. Power losses in the windings due to skin effect and proximity effect are calculated with the proposed method and the finite-element method (FEM). The comparison of both results showed excellent agreement. The computational performance is also compared with FEM. It has been found that the proposed method achieves significant improvements in computational times compared with FEM retaining the level of precision required for transformer design purposes.Index Terms-Finite-element method (FEM), integral methods, proximity effect, sheet current, skin depth, skin effect.

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Current distribution in sheet- and foil-wound transformers

Cited by 16 publications

References 3 publications

Current distribution in the low-voltage winding of the furnace transformer

Current distribution in the low-voltage winding of the furnace transformer

Fast computation of coupled fields in complex, 3‐D, industrial electromagnetic structures

Semianalytic Integral Method for Fast Solution of Current Distribution in Foil Winding Transformers

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