Analysis of effective resistance and eddy-current losses in multiturn winding of high-frequency magnetic components

Podoltsev, O.D.; Kucheryavaya, I. N.; Lebedev, B.B.

doi:10.1109/tmag.2002.806337

Cited by 125 publications

(79 citation statements)

References 7 publications

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“…The factor Φ prox (r 0 /δ), shown in Figure 2(b), is provided by many authors in a form depending on Kelvin functions, as it appears in [1,43], but the mathematical equivalent expression given in [27,29] is preferred because it is more compact, as can be seen as follows:…”

Section: Analytical Expressions Of Power Lossesmentioning

confidence: 99%

See 1 more Smart Citation

Tm-Te Decomposition of Power Losses in Multi-Stranded Litz-Wires Used in Electronic Devices

Carretero¹,

Acero²,

Alonso³

2012

PIER

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Abstract-Efficiency often constitutes the main goal in the design of a power system because the minimization of power losses in the magnetic components implies better and safer working conditions. The primary source of losses in a magnetic power component is usually associated with the current driven by the wire, which ranges from low to medium frequencies. New power system tendencies involve increasing working frequencies in order to reduce the size of devices, thus reducing costs. However, optimal design procedures involve increasingly complex solutions for improving system performance. For instance, using litz-type multi-stranded wires which have an internal structure to uniformly share the current between electrically equivalent strands, reducing the total power losses in the windings. The power losses in multi-stranded wires are generally classified into conduction losses and proximity losses due to currents induced by a magnetic field external to the strand. Both sources of loss have usually been analyzed independently, assuming certain conditions in order to simplify the derivation of expressions for calculating the correct values. In this paper, a unified analysis is performed given that both power losses are originated by the electromagnetic fields arising from external sources where the wire is immersed applying the decomposition into transversal magnetic (TM) and transversal electric (TE) components. The classical power losses, the so called conduction and proximity losses, can be calculated considering the TM modes under certain conditions. In addition, a new proximity loss contribution emerges from the TE modes under similar conditions.

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Section: Analytical Expressions Of Power Lossesmentioning

confidence: 99%

“…The expressions given in the preceding papers include the electromagnetic fields obtained either by means of analytical techniques [24,25], or by using numerical methods, in particular methods based on finite elements [23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Tm-Te Decomposition of Power Losses in Multi-Stranded Litz-Wires Used in Electronic Devices

Carretero¹,

Acero²,

Alonso³

2012

PIER

View full text Add to dashboard Cite

show abstract

“…This method requires high accuracy analysis to find an optimal design point of core. However, in general studies, the analysis is done by using the approximated sinusoidal or square voltage and current waveform for the convenience of analysis [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of High Frequency Transformer for 150W Class Module-Integrated Converter

Yoo¹,

Jung²

2015

Journal of Electrical Engineering and Technology

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-Recently, the module-integrated converter has shown an interest in the photovoltaic generation system. In this system, the high frequency transformer should be compact and efficient. The proposed method is based on the correlation characteristic between the copper and core loss to minimize the loss of transformer. By sizing an effective cross-sectional area and window area of core, the amount of loss is minimized. This paper presents the design and analysis of high frequency transformer by using the 3D finite element model coupled with DC-DC converter circuit for more accurate analysis by considering the nonlinear voltage and current waveforms in converter circuit. The current waveform in each winding is realized by using the ideal DC voltage source and switching component. And, the thermal analysis is performed to satisfy the electrical and thermal design criteria.

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“…Therefore, accurate analysis considering the real operation characteristics of a converter circuit is difficult [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Study on Core Structure of High Frequency Transformer to Improve Efficiency of Module-Integrated Converter

Yoo¹,

Jung

2014

Journal of Magnetics

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Recently, module-integrated converter (MIC) research has shown interest in small-scale photovoltaic (PV) generation. The converter is capable of efficient power generation. In this system, the high frequency transformer should be made compact, and demonstrate high efficiency characteristics. This paper presents a core structure optimization procedure to improve the efficiency of a high frequency transformer of compact size. The converter circuit is considered in the finite element analysis (FEA) model, in order to obtain an accurate FEA result. The results are verified by the testing of prototypes.

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Analysis of effective resistance and eddy-current losses in multiturn winding of high-frequency magnetic components

Cited by 125 publications

References 7 publications

Tm-Te Decomposition of Power Losses in Multi-Stranded Litz-Wires Used in Electronic Devices

Tm-Te Decomposition of Power Losses in Multi-Stranded Litz-Wires Used in Electronic Devices

Optimal Design of High Frequency Transformer for 150W Class Module-Integrated Converter

A Study on Core Structure of High Frequency Transformer to Improve Efficiency of Module-Integrated Converter

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