Integral Equation Formulations for Modeling Wireless Power Transfer Systems in Close Proximity to Foreign Objects

Bingler, Arnold; Bilicz, Sándor; Badics, Z.; Gyimóthy, Szabolcs; Pávó, József

doi:10.1109/tmag.2019.2900120

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…In these cases, the classical analytical solutions (such as those based on the Biot-Savart law [18], Bessel and Struve functions [19], or Heuman's lambda function [20]) cannot be used, since they apply to simpler cases with regularly shaped coils in homogeneous media. Therefore, these systems are usually studied through numerical models [21], either based on differential formulations [22], or the integral ones [23]. Given the complexity of these systems and the need to accurately describe frequency effects such as eddy currents, skin and proximity effect, the numerical solution is usually computationally expensive.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Wireless Power Transfer Systems Based on Behavioral Modeling of Mutual Inductance

et al. 2021

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This paper proposes a system-level approach suitable to analyze the performance of a dynamic Wireless Power Transfer System (WPTS) for electric vehicles, accounting for the uncertainty in the vehicle trajectory. The key-point of the approach is the use of an analytical behavioral model that relates mutual inductance between the coil pair to their relative positions along the actual vehicle trajectory. The behavioral model is derived from a limited training data set of simulations, by using a multi-objective genetic programming algorithm, and is validated against experimental data, taken from a real dynamic WPTS. This approach avoids the massive use of computationally expensive 3D finite element simulations, that would be required if this analysis were performed by means of look-up tables. This analytical model is here embedded into a system-level circuital model of the entire WPTS, thus allowing a fast and accurate analysis of the sensitivity of the performance as the actual vehicle trajectory deviates from the nominal one. The system-level analysis is eventually performed to assess the sensitivity of the power and efficiency of the WPTS to the vehicle misalignment from the nominal trajectory during the dynamic charging process.

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Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Wireless Power Transfer Systems Based on Behavioral Modeling of Mutual Inductance

et al. 2021

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“…Due to its commercial appeal and potentialities, the midrange Resonant Wireless Power Transfer (RWPT) has been investigated from different aspects by many research institutions, universities, and technology corporations. In this way, there are various enhancement methods focused on electromagnetic analysis [1], power electronic circuits [2], novel materials development [3], control system [4], electromagnetic compatibility [5], among other fields.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Enhancement in Mid-Range RWPT Systems by GRIN Metasurface Lenses

Soares

Freitas²,

Resende³

2021

2021 IEEE Wireless Power Transfer Conference (WPTC)

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The Magnetic Resonant Wireless Power Transfer (RWPT) is one of the best suitable techniques for mid-range applications. Therefore, there are different approaches to enhance RWPT efficiency, many of them based on metamaterial devices. In this work, the GRadient-INdex (GRIN) technique is applied to increase the coupling between transmitter and receiver coils and collimate the magnetic field, reducing its dispersion. This proposed lens topology operates at 28 MHz and is formed by a 5x5 planar and periodic arrangement of Split Ring Resonators (SRR) unit cells. In each one, a lumped capacitor is added to reduce the lens's size and radially create a refractive index gradient. Then, a four-coil RWPT system is designed at the same operating frequency. Finally, the coils and lenses are prototyped, and the RWPT efficiency is measured in three cases: without any lenses, with a conventional (uniform) metasurface, and with the proposed GRIN lens. The experimental results demonstrate that the RWPT efficiency, which is about 8% without any lenses, becomes almost four times higher (33%) after the inclusion of metasurface GRIN lenses. When the same measurement is carried out with a uniform lens, typical topology in literature, the obtained efficiency is 17.59%, nearly half of the obtained with the proposed metasurface.

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Experimental investigation of metasurface-based resonator for one-to-many wireless power transfer systems in the presence of foreign objects

Kuzmin

Zanganeh

Baranov

et al. 2023

Photonics and Nanostructures - Fundamentals and Applications

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Integral Equation Formulations for Modeling Wireless Power Transfer Systems in Close Proximity to Foreign Objects

Cited by 5 publications

References 8 publications

Analysis of Dynamic Wireless Power Transfer Systems Based on Behavioral Modeling of Mutual Inductance

Analysis of Dynamic Wireless Power Transfer Systems Based on Behavioral Modeling of Mutual Inductance

Efficiency Enhancement in Mid-Range RWPT Systems by GRIN Metasurface Lenses

Experimental investigation of metasurface-based resonator for one-to-many wireless power transfer systems in the presence of foreign objects

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