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Loss Reduction in Antenna for Wireless Power Transfer by Magnetic Resonant Coupling: Relation between Inter-wire Capacitance and the Antenna Loss
Technical Paper
2011-39-7264
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The wireless charging system of electric vehicles will be of high power. Due to environmental problems and the heat emission design of the machines, it is not easy to improve the efficiency of the power transmitting system. While improving the efficiency of the overall system is important, it is especially significant to improve the efficiency of the transmitting and receiving antennas. Improving the antennas is necessary as it accounts for a large part of the overall efficiency and it has strong relation to the transfer characteristics. In this paper, the importance of reducing the antenna loss for high power implementation is discussed. We showed that the antenna losses not only affecting the transfer efficiency but also the maximum power consumed by the load (the available power) by deriving an equation. Through mathematical equations and experiments, we also proved that the antenna loss is caused by both the resistance of the antenna wires and the inter-wire capacitance of the antenna.
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Kato, M., Imura, T., Uchida, T., and Hori, Y., "Loss Reduction in Antenna for Wireless Power Transfer by Magnetic Resonant Coupling: Relation between Inter-wire Capacitance and the Antenna Loss," SAE Technical Paper 2011-39-7264, 2011, https://doi.org/10.4271/2011-39-7264.Also In
References
- CHAdeMO Association CHAdeMO Chargers http://www.chademo.com/indexe.html
- Imura, Takehiro et. all Study of Magnetic and Electric Coupling for Contactless Power Transfer Using Equivalent Circuits Wireless Power Transfer via Electromagnetic Coupling at Resonance, The transactions of IEEJ D 130 1 84 92 2010
- Kato, Masaki et. al Wireless Power Transfer of Magnetic Resonant Coupling Using Self Resonance Frequency JIASC 2010
- Okabe, Hiroyuki et. al Dependence on Pitch Width of Antennas for Contactless Power Transfer using Magnetic Coupling of Resonance JIASC 2009