A study of three-coil magnetically coupled resonators for wireless power transfer

With the development of electric vehicle and consumer electronics, the wireless power transfer (WPT) becomes a popular technology. Magnetic resonant coupling is considered to be the most effective and attractive WPT approach in recent years. Two-coil structure is widely used, where optimal load valu...

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Bibliographic Details
Published in2015 IEEE International Wireless Symposium (IWS 2015) pp. 1 - 4
Main Authors Jian Zhang, Xinmei Yuan, Chuang Wang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2015
Subjects
3-coil
Coils
Couplings
efficiency stiffness
electromagnetic field (EMF) emission
Impedance
Integrated circuit modeling
Magnetic resonance
magnetic resonant coupling
Power electronics
Wireless communication
Wireless power transfer (WPT)
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Summary:With the development of electric vehicle and consumer electronics, the wireless power transfer (WPT) becomes a popular technology. Magnetic resonant coupling is considered to be the most effective and attractive WPT approach in recent years. Two-coil structure is widely used, where optimal load value and distance are critical to achieve maximum efficiency. In this paper, a three-coil structure is proposed, analyzed and compared with two-coil structure. With the proposed structure, the efficiency stiffness of the system is improved, therefore, a wider range of load and distance variation can be tolerated. Additionally, with the proposed structure, the electromagnetic field (EMF) emission caused by coils misalignment is significantly reduced. The comparisons of two-coil and three-coil WPT systems are evaluated and verified with simulation and experimental results.
DOI:10.1109/IEEE-IWS.2015.7164536