Introduction to Wireless Power Transfer

Zhang, Yiming

doi:10.1007/978-981-10-6538-5_1

Cited by 2 publications

(1 citation statement)

References 81 publications

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“…In [15][16][17], superconductor is utilized to reduce the coil losses and increase transmission distance. But it is very expensive and hard to popularize at the moment.…”

Section: Introductionmentioning

confidence: 99%

An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

Zhang

Meng

Wei

et al. 2018

J Wireless Com Network

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When wireless power transfer (WPT) technology is used to power the sensor networks, it is necessary to increase the transmission power and distance. We strictly deduced two necessary conditions for strong coupling by coupled mode theory. Next, the transmission power and efficiency as a function of coupling coefficient and quality factor are derived, and the maximum active power of the load depends on the coupling coefficient between resonators, quality factor of the resonator and the drive power. In order to increase transmission power and distance, an improved three-coil wireless power link is proposed. Meanwhile, an experimental platform was established, and the experimental results show that the transmission power can reach 120 W at a distance of 2.5 m. This proves that the improved three-coil wireless power link is very effective.

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“…In [15][16][17], superconductor is utilized to reduce the coil losses and increase transmission distance. But it is very expensive and hard to popularize at the moment.…”

Section: Introductionmentioning

confidence: 99%

An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

Zhang

Meng

Wei

et al. 2018

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

Design of high efficiency low frequency wireless power transfer system for electric vehicle charging

Shehata

2021

Electr Eng

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In this paper, a high-efficiency wireless power transfer (WPT) system based on magnetic resonant coupling is designed to operate at low frequency for electric vehicle charging. For simplicity, two coils wireless power transfer is proposed. Transmitter and receiver coils of WPT system are designed to improve quality factors and coupling coefficient. Effect of turns, coil radius, and misalignment on coil parameters and system performance are analyzed using three-dimension finite element method. Compensation circuit is designed and analyzed to achieve maximum power transfer efficiency. The effect of coupling coefficient value on system efficiency and resonance frequency is investigated. Input power, output power, and compensation capacitors voltage stress of the two compensation methods are analyzed and compared. Finally, the system performance is tested under different spacing and misalignment. Power transfer efficiency is more than 95% even under misalignment.

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Introduction to Wireless Power Transfer

Cited by 2 publications

References 81 publications

An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

Design of high efficiency low frequency wireless power transfer system for electric vehicle charging

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