Effect of Coil Dimensions on Dynamic Wireless Power Transfer for Electric Vehicles

Bareli, Sahar; Geri, Lidor; Nikulshin, Yasha; Nahum, Oren E.; Hadas, Yuval; Yeshurun, Y.; Yaniv, Eyal; Wolfus, Shuki

doi:10.36227/techrxiv.14852559.v1

Cited by 1 publication

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“…coating, and air. The frequency at which the inductance (Ls) and intrinsic parallel capacitor (Cp) cause resonance is called the Self-Resonant Frequency (SRF) and is found by: In inductive design, the SRF frequency is usually higher than the ISM band (Industrial, Scientific, and Medical band), and to avoid interference, the resonance frequency of the circuit must be much smaller or equal to SRF [28,29]. The series resistance (RS) is a model of the losses that occur in the conductor of the coil.…”

Section: Theoretical Model Of Inductive Power Transmissionmentioning

confidence: 99%

Using Overlapped Resonators in Wireless Power Transfer for Uniform Electromagnetic Field and Removing Blank Spots in Free Moving Applications

et al. 2022

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We propose an induction link based on overlapping arrays to eliminate blank spots on the electromagnetic field for moving object applications. We use two arrays of four aligned coils that have a 50% overlap between the two plates. This mechanism compensates for the internal coil power drop at positions in the boundaries between two adjacent external coils. We showed that if these plates are excited, a uniform electromagnetic field is created in the movement direction of the moving object. This uniform electromagnetic field distribution will result in a constant receiving power at all points in the path of the moving internal coil with the same power consumption of one coil excitation. Power delivery to the moving object tolerance reaches 10% at most, while, in non-overlapped scenarios, it is approximately 50%. In addition, according to the theoretical calculations, printed circuit coils (PCB) for the array are designed for maximum efficiency. We found that the change in distance and dimensions of the receiver coil has a linear effect on power and efficiency. Moreover, a Specific Absorption Rate (SAR) simulation was performed for biocompatibility. In this paper, we investigate and record a 68% electrical power efficiency for the fabricated system. The array consists of eight transmitters coils of the same size and shape and a receiver coil at a distance of 4 cm. Furthermore, the fabricated coil has shown improved efficiency compared to similar studies in the literature and introduces a promising structure for bio-test applications.

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Section: Theoretical Model Of Inductive Power Transmissionmentioning

confidence: 99%