Transformer winding loss caused by skin and proximity effects including harmonics in pulse-width modulated DC–DC flyback converters for the continuous conduction mode

Murthy-Bellur, Dakshina; Kondrath, Nisha; Kazimierczuk, Marian K.

doi:10.1049/iet-pel.2010.0040

Cited by 41 publications

(26 citation statements)

References 31 publications

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“…Due to the linear behavior of copper, conduction loss analysis is carried out based on the harmonic contents of the currents in the windings of the magnetic link [7], [8], [20], [21]. Therefore, the total copper loss can be defined by integration of resultant loss of each harmonic component of the current as following…”

Section: Copper Loss Analysis Methodsmentioning

confidence: 99%

“…The harmonic based analysis of non-sinusoidal currents has been widely used for copper loss analysis of transformers [8], [20], [21]. To calculate the copper loss in the proposed magnetic link, currents in the windings are analyzed using the equivalent Δ-model.…”

Section: Harmonic Based Analysis Of the Currents In The Magnetic mentioning

confidence: 99%

“…In this method (proposed in 1966), the skin and proximity effect losses of an isolated solid round conductor were evaluated using an exact solution of the internal and external magnetic fields [14] and further developed by Ferreira in 1990 [22], [23]. The closed form expression considering orthogonality of skin and proximity effects can be written as (21) where ber and bei are the real and imaginary parts of the first kind Bessel function and γn is the round conductor penetration ratio of the nth harmonic and is defined as…”

Section: Calculation Of Ac Resistancementioning

confidence: 99%

“…Both methods provide good accuracy especially where strand diameter is much lower than the skin depth [7], [13], [16]. A detailed study on copper loss analysis of buck and fly-back dc-dc converters under variable duty ratio based on the first analytical method has been presented recently [20], [21] although none of these studies deal with the multiple winding transformer and phase shifted waveforms. In [8] the copper loss of a dual active bridge (DAB) bidirectional converter is studied considering the effects of phase shift of voltages applied to the transformer.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Accurate copper loss analysis of a multi-winding high-frequency transformer for a magnetically-coupled residential micro-grid

Jafari

Malekjamshidi

Zhu

2017

2017 20th International Conference on Electrical Machines and Systems (ICEMS)

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Improvements in characteristics of magnetic materials and switching devices have provided the feasibility of replacing the electrical buses with high frequency magnetic links in micro-grids. This effectively reduces the number of voltage conversion stages, and the size and cost of the renewable energy system. It also isolates the converter ports which increases the system safety and facilitates bidirectional power flow and energy management. To design the magnetic link optimally, an accurate evaluation of copper loss of the windings considering both current waveforms and parasitic effects is required. This paper studies the accurate copper loss analysis of a three-winding high-frequency magnetic link for residential micro-grid applications. Due to the non-sinusoidal nature of the voltage and currents, the loss analysis is carried out on a harmonic basis taking into account variations of phase shift, duty ratio and amplitude of wave-forms. The high frequency skin and proximity effects are taken into account. The maximum and minimum copper loss operating points of the converter and their dependency on the phase shift and duty ratio of the waveforms are studied and simulation results are presented.

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Section: Copper Loss Analysis Methodsmentioning

confidence: 99%

Section: Harmonic Based Analysis Of the Currents In The Magnetic mentioning

confidence: 99%

Section: Calculation Of Ac Resistancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Accurate copper loss analysis of a multi-winding high-frequency transformer for a magnetically-coupled residential micro-grid

Jafari

Malekjamshidi

Zhu

2017

2017 20th International Conference on Electrical Machines and Systems (ICEMS)

View full text Add to dashboard Cite

show abstract

“…Fly-back converters are widely adopted for low-power offline application due to their simple structures and low component counts. There are many applications and refinement work on the fly-back converter [6]- [8]. Up until now, the polymer-bonded magnetic materials have not been widely applied in power conversion.…”

Section: Introductionmentioning

confidence: 99%

A Polymer-Bonded Magnetic Core for High-Frequency Converters

et al. 2012

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This paper presents a polymer-bonded magnetic core (PBMC) for high-frequency converters. The material of the magnetic core is composed of polymer matrices and special magnetic powder. With these materials, lightweight, nonbrittle, low-cost magnetic cores can be produced with flexible shapes and different dimensions. The magnetic field of an EI-type PBMC used for fly-back converter is obtained using two dimensional (2-D) finite element analysis (FEA). The detailed energy conversion process is studied with 2-D, direct-coupled field-circuit, and time-stepping FEA. The electromagnetic power conversion of the converter is illustrated with circuit and field analysis result. A 100 W fly-back converter is implemented with a novel-developed PBMC. The analysis is verified by experimental results, and the application feasibility is validated with the PBMCs for power conversion.

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Energetic Efficiency Improvement in Photovoltaic Energy Systems Through a Design Methodology of Static Converter

Beltrame

Sartori²,

Pinheiro³

2015

J Control Autom Electr Syst

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Transformer winding loss caused by skin and proximity effects including harmonics in pulse-width modulated DC–DC flyback converters for the continuous conduction mode

Cited by 41 publications

References 31 publications

Accurate copper loss analysis of a multi-winding high-frequency transformer for a magnetically-coupled residential micro-grid

Accurate copper loss analysis of a multi-winding high-frequency transformer for a magnetically-coupled residential micro-grid

A Polymer-Bonded Magnetic Core for High-Frequency Converters

Energetic Efficiency Improvement in Photovoltaic Energy Systems Through a Design Methodology of Static Converter

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