This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/3.0/)
For the wireless power transfer (WPT) system, the transfer performance and the coupling coefficient are contradictory. In this paper, a novel parallel-T resonant topology consists of a traditional parallel circuit and a T-matching network for secondary side is proposed. With this method, a boosted voltage can be output to the load, since this topology has a resonant enhancement effect, and high Q value can be obtained at a low resonant frequency and low coil inductance. This feature makes it more suitable for weak coupling WPT applications. Besides, the proposed topology shows good frequency stability and adaptability to variations of load. Experimental results show that the output voltage gain improves by 757% compared with traditional series circuit, and reaches 85% total efficiency when the coupling coefficient is 0.046.
References
-
-
1)
-
34. Huang, C., Boys, J., Covic, G.: ‘LCL pickup circulating current controller for inductive power transfer systems’, IEEE Trans. Power Electron., 2013, 28, (4), pp. 2081–2093 (doi: 10.1109/TPEL.2012.2199132).
-
2)
-
41. Madawala, U., Thrimawithana, D.: ‘A bidirectional inductive power interface for electric vehicles in V2G systems’, IEEE Trans. Ind. Electron., 2011, 58, (10), pp. 4789–4796 (doi: 10.1109/TIE.2011.2114312).
-
3)
-
33. Keeling, N., Covic, G., Boys, J.: ‘A unity-power-factor IPT pickup for high-power applications’, IEEE Trans. Ind. Electron., 2010, 57, (2), pp. 744–751 (doi: 10.1109/TIE.2009.2027255).
-
4)
-
3. Li, S., Li, W., Deng, J., Nguyen, T.D., Mi, C.C.: ‘A double-sided LCC compensation network and its tuning method for wireless power transfer’, IEEE Trans. Veh. Technol., 2014, PP, (99), pp. 1–12.
-
5)
-
30. Wang, C., Stielau, O., Covic, G.: ‘Design considerations for a contactless electric vehicle battery charger’, IEEE Trans. Ind. Electron., 2005, 52, (5), pp. 1308–1314 (doi: 10.1109/TIE.2005.855672).
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Resonant enhanced parallel-T topology for weak coupling wireless power transfer pickup applications