Near-Field Reduction in a Wireless Power Transfer System Using LCC Compensation

Campi, Tommaso; Cruciani, Silvano; Maradei, F.

doi:10.1109/temc.2016.2641383

Cited by 96 publications

(45 citation statements)

References 17 publications

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“…For the aligned coil condition, some results have already been shown in [12]. However, in the case of a misalignment between the coils, the coupling factor between them is drastically reduced [17]. This condition leads to an important increase of the current in the coils respect to the case where the coils are perfectly aligned.…”

Section: Wpt Circuit Modelmentioning

confidence: 98%

“…transfer to the load a power PL = 7.7 kW with the output voltage Vout = 200 V [16]. For simplicity, the load is modeled as a simple power resistor RL while the source is an ideal sinusoidal voltage generator VG with a series resistance RG [17,18]. To improve system performance and reduce magnetic field leakage, some ferrite is used.…”

Section: Wpt System Configurationmentioning

confidence: 99%

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Assessment of the Induced Electric Fields in a Carbon-Fiber Electrical Vehicle Equipped with a Wireless Power Transfer System

et al. 2018

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Abstract:In this study, the electric field induced inside two realistic anatomical models placed near or inside an electric vehicle made of carbon-fiber composite while charging its battery with a wireless power transfer (WPT) system has been investigated. The WPT source consists of two parallel inductive coils operating with a power output of 7.7 kW at two different frequencies of 85 and 150 kHz. Since a misalignment between the primary and the secondary coil creates higher induced fields, a misalignment of 20 cm is also considered as the worst-case exposure condition. The analysis of the obtained results shows that the International Commission on Non-Ionizing Radiation Protection (ICNIRP) basic restrictions are exceeded by 1.3 dB and 4.8 dB for the aligned and misaligned coil positions, respectively. This exceedance is however confined only in a small area of the driver's foot.

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Section: Wpt Circuit Modelmentioning

confidence: 98%

Section: Wpt System Configurationmentioning

confidence: 99%

Assessment of the Induced Electric Fields in a Carbon-Fiber Electrical Vehicle Equipped with a Wireless Power Transfer System

et al. 2018

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“…In this figure, R 1 and R 2 are the primary and secondary coil resistances, L 1 and L 2 are the coil self-inductances, M is the coil mutual inductance, C 1 and C 2 are the compensation capacitors, V G and R G model the feeding source, and R L is the resistive load [1]. When considering the SS compensation of Figure 10a, with capacitances C 1 = 1/(ω 0 2 L 1 ) and C 2 = 1/(ω 0 2 L 2 ) to assure resonance condition at the resonance angular frequency ω 0 , the currents on the primary and secondary coils are given by [25]: Figure 9. Magnetic flux lines and B maps in dBT for three housing materials for θ = 0° (silicone (a), titanium (b), titanium with ferrite cover (c)) and for θ = 60° (silicone (d), titanium (e), titanium with ferrite cover (f)).…”

Section: Receiving Side Designmentioning

confidence: 99%

Near Field Wireless Powering of Deep Medical Implants

et al. 2019

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This study deals with the inductive-based wireless power transfer (WPT) technology applied to power a deep implant with no fixed position. The usage of a large primary coil is here proposed in order to obtain a nearly uniform magnetic field inside the human body at intermediate frequencies (IFs). A simple configuration of the primary coil, derived by the Helmholtz theory, is proposed. Then, a detailed analysis is carried out to assess the compliance with electromagnetic field (EMF) safety standards. General guidelines on the design of primary and secondary coils are provided for powering or charging a deep implant of cylindrical shape with or without metal housing. Finally, three different WPT coil demonstrators have been fabricated and tested. The obtained results have demonstrated the validity of the proposed technology.

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“…Its application is expanded from military to civil use [1,2], scientific research, and other fields [3][4][5]. UAV can be equipped with many payloads, such as cameras, sensors, positioning systems [6][7][8]. These loads are often powered by high energy density lithium batteries, which can only last for 20-40 min [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Design of UAV wireless power transmission system based on coupling coil structure optimization

Yan

Shi

Zhang

2020

J Wireless Com Network

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With the development of unmanned aerial vehicle (UAV), it has been used in many fields, such as aerial photography, military, and transportation. However, it is a challenge for charging due to its short battery life. Wireless charging has been considered as a good UAV solution. In this paper, we proposed a wireless power transmission system (WPT) through inductive coupling and analyzed the power efficiency of the inductive coupling. The WPT included a charging station, which can provide energy through an induction coil array, and a portable energy receiving device mounted on the base of the UAV. Moreover, the power efficiency was analyzed though the equivalent circuit of WPT and the mathematical model of the power efficiency was established. The results showed that the WPT can transfer energy to UAV with high power efficiency within a 30 mm lateral displacement range.

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Near-Field Reduction in a Wireless Power Transfer System Using LCC Compensation

Cited by 96 publications

References 17 publications

Assessment of the Induced Electric Fields in a Carbon-Fiber Electrical Vehicle Equipped with a Wireless Power Transfer System

Assessment of the Induced Electric Fields in a Carbon-Fiber Electrical Vehicle Equipped with a Wireless Power Transfer System

Near Field Wireless Powering of Deep Medical Implants

Design of UAV wireless power transmission system based on coupling coil structure optimization

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