Comparison Between Numerical and Analytical Methods of AC Resistance Evaluation for Medium-Frequency Transformers: Validation on a Prototype and Thermal Impact Analysis

Pereira, Albert; Sixdenier, Fabien; Raulet, Marie–Ange; Lefebvre, Bruno; Burais, Noël

doi:10.1109/cjece.2016.2594118

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…In coil regions, analytical models, e.g., such as presented in [8,24], are often applied for the approximation of the coil ac resistance. However, such approximations might lead to significant underestimations of the ac resistance [25]. Consequently, the accuracy of the thermal model and efficiency calculation is compromised.…”

Section: Introductionmentioning

confidence: 99%

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Spectral Element-Based Multi-Physical Modeling Framework for Axisymmetric Wireless Power Transfer Systems

2022

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This paper concerns a multi-physical modeling framework based on the spectral element method (SEM) for axisymmetric wireless power transfer systems. The modeling framework consists of an electromagnetic and a thermal model. The electromagnetic model allows for eddy currents in source- and non-source regions to be included in the analysis. The SEM is a numerical method, which is particularly advantageous in 2D problems for which the skin-depth is several orders of magnitude smaller compared to the object dimensions and complex geometrical shapes are absent. The SEM applies high-order trial functions to obtain the approximate solution to a boundary-value problem. To that end, the approximation is expressed as an interpolation at a set of nodal points, i.e., the nodal representation. The trial functions are Legendre polynomials, which reduces the complexity of the formulation. Furthermore, numerical integration is performed through Gaussian quadratures. In order to verify the SEM, a benchmark system is modeled using both the SEM and a finite element-based commercial software. The differences in the SEM solutions, i.e., magnetic vector potential and temperature distribution, and the discrepancies in essential post-processing quantities are assessed with respect to the finite element solutions. Additionally, the computational efforts of both methods are evaluated in terms of the sparsity, number of degrees of freedom, and non-zero elements.

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Section: Introductionmentioning

confidence: 99%

“…The mapping function and the corresponding derivatives are evaluated for each element according to (25) and (29), respectively.…”

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confidence: 99%

Spectral Element-Based Multi-Physical Modeling Framework for Axisymmetric Wireless Power Transfer Systems

2022

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“…Dowell and Ferreira formulas are often used to estimate the AC resistance of inductors needed for AC copper losses calculation in low frequency [16], [17]. In high frequency, the AC resistance calculation is based on simulation tools, because of the difficulty to predict the magnetic flux lines [18]. Magnetic losses due to hysteresis and eddy current are often calculated with Steinmetz formulas [19], [20].…”

Section: Introductionmentioning

confidence: 99%

Design Method of PCB Inductors for High-Frequency GaN Converters

Chafi

Idir

Videt

et al. 2021

IEEE Trans. Power Electron.

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Improved Analytical Calculation of High Frequency Winding Losses in Planar Inductors

Wang

Mao

et al. 2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

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Comparison Between Numerical and Analytical Methods of AC Resistance Evaluation for Medium-Frequency Transformers: Validation on a Prototype and Thermal Impact Analysis

Cited by 8 publications

References 15 publications

Spectral Element-Based Multi-Physical Modeling Framework for Axisymmetric Wireless Power Transfer Systems

Spectral Element-Based Multi-Physical Modeling Framework for Axisymmetric Wireless Power Transfer Systems

Design Method of PCB Inductors for High-Frequency GaN Converters

Improved Analytical Calculation of High Frequency Winding Losses in Planar Inductors

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