Proceedings ArticleDOI
Wireless charger prototype based on strong coupled magnetic resonance
Yanping Yao,Hongyan Zhang,Zheng Geng +2 more
- Vol. 5, pp 2252-2254
TLDR
Experimental results show that this wireless charger prototype based on strong coupled magnetic resonance can wirelessly charge a NOKIA cell phone over a distance 40cm with an input power of less than 4 watt, and has an efficiency of 52% over a 32cm distance.Abstract:
Strong coupled magnetic resonance has been convinced to be a new and efficient wireless power transfer way by the previous work conducted by MIT and Intel researchers. It offers the promise for automobile electric vehicles and mobile consumer electronic devices to be wireless charged efficiently and safely. For the first time, a wireless charger prototype based on this technology is presented in this paper. Schematics and design considerations are also discussed. Experimental results show that this prototype can wirelessly charge a NOKIA cell phone over a distance 40cm with an input power of less than 4 watt, and has an efficiency of 52% over a 32cm distance.read more
Citations
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Journal ArticleDOI
Single Active Switch Power Electronics for Kilowatt Scale Capacitive Power Transfer
Jiejian Dai,Daniel C. Ludois +1 more
TL;DR: In this article, the authors proposed four single active switch CPT topologies based on the canonical Cuk, SEPIC, Zeta, and Buck-boost converters and investigated performance tradeoffs within the context of a CPT system.
Journal ArticleDOI
Finite-Width Magnetic Mirror Models of Mono and Dual Coils for Wireless Electric Vehicles
Wooyoung Lee,J. Huh,S. Y. Choi,X. V. Thai,J. H. Kim,Essam A. Al-Ammar,Mohamed A. El-Kady,Chun T. Rim +7 more
TL;DR: Improved magnetic mirror models (IM3) for mono and dual coils with a finite width and infinite permeability are proposed in this paper, where the magnetic flux density over an open core plate is analyzed and its maximum points on the plate are found, which is crucial in the design of the coils to avoid local magnetic saturation.
Journal ArticleDOI
Joint Transmission and Energy Transfer Policies for Energy Harvesting Devices With Finite Batteries
Alessandro Biason,Michele Zorzi +1 more
TL;DR: In this paper, the authors studied the combination of ambient energy harvesting and wireless energy transfer (ET) to improve the performance of WSNs and showed that ET can significantly improve the system performance even when a sizable fraction of the transmitted energy is wasted.
State of the Art in Inductive Charging for Electronic Appliances and its Future in Transportation
Neha Chawla,Sabri Tosunoglu +1 more
TL;DR: In this paper, the working principle, advantages, disadvantages and limitations of inductive charging mats/pads used for electronic devices are discussed. And new advancements in inductive chargers for transportation are also reviewed.
Journal ArticleDOI
Joint Transmission and Energy Transfer Policies for Energy Harvesting Devices with Finite Batteries
Alessandro Biason,Michele Zorzi +1 more
TL;DR: It is shown that ET can significantly improve the system performance even when a sizable fraction of the transmitted energy is wasted and that, in some scenarios, the online approach can obtain close to optimal performance.
References
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Journal ArticleDOI
Wireless Power Transfer via Strongly Coupled Magnetic Resonances
Andre B. Kurs,Aristeidis Karalis,Robert Moffatt,John D. Joannopoulos,Peter H. Fisher,Marin Soljacic +5 more
TL;DR: A quantitative model is presented describing the power transfer of self-resonant coils in a strongly coupled regime, which matches the experimental results to within 5%.
Journal ArticleDOI
Analysis, Experimental Results, and Range Adaptation of Magnetically Coupled Resonators for Wireless Power Transfer
TL;DR: A circuit model is presented along with a derivation of key system concepts, such as frequency splitting, the maximum operating distance (critical coupling), and the behavior of the system as it becomes undercoupled, including the introduction of key figures of merit.
Journal ArticleDOI
Efficient wireless non-radiative mid-range energy transfer
TL;DR: In this article, the physical phenomenon of long-lifetime resonant electromagnetic states with localized slowly-evanescent field patterns was investigated to transfer energy efficiently over non-negligible distances even in the presence of extraneous environmental objects.
Patent
Wireless non-radiative energy transfer
TL;DR: In this paper, the authors proposed an electromagnetic energy transfer device that includes a first resonator structure receiving energy from an external power supply, and a second resonance structure is positioned distal from the first, and supplies useful working power to an external load.
Proceedings ArticleDOI
Physical Pictures and Performance Analysis of Wireless Power Transfer via Evanescent Fields
TL;DR: In this paper, the physical pictures of wireless power transfer via evanescent fields were presented and the authors investigated the energy transfer efficiency and performance of WPT systems in detail and established their relationship with respect to the coupling strength and the output load parameters.