Analysis and Design of Circular Coil Transformer in a Wireless Power Transfer System for Electric Vehicle Charging Application

Bouanou, Tasnime; Fadil, H. El; Lassioui, Abdellah

doi:10.1109/iceit48248.2020.9113190

Cited by 10 publications

(8 citation statements)

References 10 publications

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“…The current flowing into the ground-and vehicle-side coils could be expressed, respectively, as shown in (20) and (21). Efficiency In view of this, for a fixed coupling coefficient, the load must verify the condition given in (18) in order to avoid the bifurcation phenomenon.…”

Section: Effect Of the DC Side And Battery Voltages On The Power Tran...mentioning

confidence: 99%

“…The current flowing into the ground-and vehicle-side coils could be expressed, respectively, as shown in ( 20) and (21).…”

Section: Effect Of the DC Side And Battery Voltages On The Power Tran...mentioning

confidence: 99%

“…However, the square coils are more tolerable to misalignments. This makes circular coils best suited for stationary charging, while rectangular coils are recommended for dynamic charging [6,21]. With this in mind, the circular geometry is adopted in the current design.…”

Section: Coil Geometry Choicementioning

confidence: 99%

See 2 more Smart Citations

Analysis, Design and Realization of a Wireless Power Transfer Charger for Electric Vehicles: Theoretical Approach and Experimental Results

Bentalhik

Lassioui

Fadil

et al. 2022

WEVJ

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Wireless power transfer (WPT) chargers are promising solutions for charging electric vehicles (EVs). Due to their advantages such as ease and safety of use, these chargers are increasingly replacing conductive ones. In this paper, we first provide a detailed analysis to illustrate the effect of varying parameters on the operation of the WPT charger. Secondly, we present the main design steps of the charger elements while respecting the recommendations of the SAEJ2954 standard in terms of operating frequency, efficiency and misalignments. Regarding the design of the ground-side and vehicle-side coils, we propose three different circular geometries whose parameters are determined using an iterative approach. The latter is compared with a finite element analysis performed under Ansys Maxwell software showing the convergence between theoretical calculations and the simulation results. Finally, an experimental prototype with a power of 500 W is realized. In addition, different test scenarios are performed to validate the proposed design approach. In this respect, an efficiency of 90% is obtained for a power of 500 W and a distance between coils of 125 mm. Moreover, the test of the charger in the most unfavorable operating case (misalignments of Δx = 70 mm, Δy = 10 mm and Δz = 150 mm) gives an efficiency of 83.5%, which remains above the limit of the SAEJ2954 standard.

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Section: Effect Of the DC Side And Battery Voltages On The Power Tran...mentioning

confidence: 99%

“…The current flowing into the ground-and vehicle-side coils could be expressed, respectively, as shown in ( 20) and (21).…”

Section: Effect Of the DC Side And Battery Voltages On The Power Tran...mentioning

confidence: 99%

See 1 more Smart Citation

Analysis, Design and Realization of a Wireless Power Transfer Charger for Electric Vehicles: Theoretical Approach and Experimental Results

Bentalhik

Lassioui

Fadil

et al. 2022

WEVJ

Self Cite

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show abstract

“…In this study, the Litz wire with 500 strands and 0.12 mm diameter is chosen. The total diameter of Litz wire is 3.6 mm, and it is decided empirically by Equation (15).…”

Section: Experimental Verificationmentioning

confidence: 99%

“…Planar spiral coils have been widely adopted in many electromagnetic applications ranging from low power such as mobile phones, electric toothbrushes, and biomedical implants [1][2][3][4][5][6][7][8][9][10] to the high-power drone charging systems and electric vehicles. The wireless power transfer (WPT) method was employed to transfer power between these coils [11][12][13][14][15]. WPT consists of a primary coil and a secondary coil.…”

Section: Introductionmentioning

confidence: 99%

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

Hussain

Woo

2022

Sensors

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In this paper, a simplified method for the calculation of a mutual inductance of the planar spiral coil, motivated from the Archimedean spiral, is presented. This method is derived by solving Neumann’s integral formula in a cylindrical coordinate system, and a numerical tool is used to determine the value of mutual inductance. This approach can calculate the mutual inductances accurately at various coaxial and non-coaxial distances for different coil geometries. The calculation result is compared with the 3D finite element analyses to verify its accuracy, which shows good consistency. Furthermore, to confirm it experimentally, Litz wire is used to fabricate the sample spiral coils. Finally, the comparison of a simplified method is also studied relative to the coupling coefficient. The accuracy of the calculation results with the simulation and the measurement results makes it a good candidate to apply it in wireless power applications.

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Dynamic WPT Chargers: State of the Art

Hamed

Fadil

Lassioui

et al. 2023

Lecture Notes in Networks and Systems

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Analysis and Design of Circular Coil Transformer in a Wireless Power Transfer System for Electric Vehicle Charging Application

Cited by 10 publications

References 10 publications

Analysis, Design and Realization of a Wireless Power Transfer Charger for Electric Vehicles: Theoretical Approach and Experimental Results

Analysis, Design and Realization of a Wireless Power Transfer Charger for Electric Vehicles: Theoretical Approach and Experimental Results

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

Dynamic WPT Chargers: State of the Art

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