Simplified Mutual Inductance Calculation of Planar Spiral Coil for Wireless Power Applications

Hussain, Iftikhar; Woo, Dong-Kyun

doi:10.3390/s22041537

Cited by 10 publications

(3 citation statements)

References 27 publications

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“…The proposed method can be used in calculating inductance in wireless energy transmission (electric vehicle power supply systems) [20,23,24,28,[42][43][44], in biomedical applications (biomedical telemetry, implantable biomedical sensors, intraocular sensors) [4,5], in the wireless power supply of excitation systems of electric machines [6], in the optimization of antenna systems, in various types of accelerators, in robotics applications, and in other similar electrical systems.…”

Section: Discussionmentioning

confidence: 99%

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Fast Analytic–Numerical Algorithms for Calculating Mutual and Self-Inductances of Air Coils

Palka

2024

Energies

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This paper deals with a method of calculating the mutual and self-inductances of various air coils located arbitrarily in space. Known elementary solutions (the Biot–Savart formulas) were used to determine the magnetic field of infinitely thin current loops and infinitely thin wires of finite length magnetically linking other coils. Unlike commonly used algorithms, these elementary solutions were not extensively transformed analytically but were used to perform calculations via direct numerical integration. This enabled the very quick and accurate obtaining of the self-inductance values, as well as determining the dependence of mutual inductances on the positions of both coils. This method allows for the analysis of different coil configurations (misaligned coils, inclined to each other, etc.) that other methods do not cover. It also enables the determination of the forces acting on the coils, as well as the calculation of the magnetic field distribution from any coil configuration. The obtained results were compared with those presented by other authors (both computational and measurement results).

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Section: Discussionmentioning

confidence: 99%

“…This coil system can also be analyzed from the point of view of powering a vehicle moving above the primary coil system. Problems related to wireless energy transmission in electric vehicles are extensively discussed in articles [42][43][44] and also in the previously mentioned articles [20,23,24,28].…”

Section: Moving Coils: Induced Voltages and Forcesmentioning

confidence: 99%

Fast Analytic–Numerical Algorithms for Calculating Mutual and Self-Inductances of Air Coils

Palka

2024

Energies

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“…The percentage of measurement variations compared to experimental and modeling methods was limited to 6.14%. In another study by Hussain and Woo (Hussain & Woo, 2022), mutual inductance calculation was only performed for two flat circular coils. In this study, spatial misalignments were disregarded.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Mutual Inductance between Two Planar Coils with Custom Specifications and Positions Using a Machine Learning Approach

Asadi,

Ali Rezaei,

Abazari

2023

icontas

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Wireless power transmission systems enable the transfer of electricity between grids without the use of physical wires. Different methods are employed for wireless power transfer, each suited to different distances. Inductive coupling, the subject of this study, is typically used for shorter distances. The effectiveness of inductive coupling systems is evaluated using a parameter called mutual inductance. In the present study, an attempt is made to provide a model for calculating mutual inductance in wireless power transfer systems using a machine learning approach. To achieve this goal, finite element simulations are employed, and 64 datasets are generated from mutual inductance calculations in various scenarios. These datasets are used to train machine learning regression algorithms, including linear regression, support vector regression, decision tree regression, and artificial neural networks. The evaluation results, using performance metrics such as R-squared, mean absolute error, and root mean square error, confirm that among these four algorithms, the artificial neural network exhibits higher computational accuracy with an R-squared value of 0.950 for predicting test data.

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Coupling coefficient calculation method of circular coil with bilateral finite magnetic shields at horizontal misalignment in wireless power transfer systems

Chen,

Li,

Lyu

et al. 2024

Circuit Theory & Apps

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The coupling coefficient determines the transfer efficiency of the wireless power transfer (WPT) system. The magnetic leakage can be reduced, and the coupling coefficient of the coil can be enhanced by adding a magnetic shield. Thus, the transfer efficiency of the WPT system can be improved. However, when the receiving coil is added with magnetic shield and occurs horizontally misaligned, the coupling coefficients between the coils with the magnetic shield can only be calculated by finite element simulation, and there is no calculation method for the coupling coefficient of two circular coils with bilateral finite magnetic shield at horizontal misalignment. Therefore, based on Maxwell's equations and Bessel's function, the formula of the coupling coefficient between circular coils at coaxial is derived by the subdomain hierarchical analysis (SHA) method. On this basis, the coupling coefficient calculation formula between circular coils at horizontal misalignment is further derived by using the boundary vector equivalence (BVE) method. The results show that the maximum experimental error is not more than 5.58%, and the longest average time of the algorithm is not more than 1.282 s, which verifies the effectiveness and rapidity of the proposed method.

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Simplified Mutual Inductance Calculation of Planar Spiral Coil for Wireless Power Applications

Cited by 10 publications

References 27 publications

Fast Analytic–Numerical Algorithms for Calculating Mutual and Self-Inductances of Air Coils

Fast Analytic–Numerical Algorithms for Calculating Mutual and Self-Inductances of Air Coils

Calculation of Mutual Inductance between Two Planar Coils with Custom Specifications and Positions Using a Machine Learning Approach

Coupling coefficient calculation method of circular coil with bilateral finite magnetic shields at horizontal misalignment in wireless power transfer systems

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