Open AccessResonant enhanced parallel‐T topology for weak coupling wireless power transfer pickup applications
Author(s) -
Guo Yao,
Wei Guo,
Zhu Chunbo,
Lu Rengui,
Song Kai
Publication year - 2015
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2014.0343
Subject(s) - topology (electrical circuits) , wireless power transfer , inductance , coupling coefficient of resonators , coupling (piping) , resonant inductive coupling , voltage , electronic engineering , maximum power transfer theorem , power (physics) , computer science , physics , electrical engineering , electromagnetic coil , materials science , engineering , energy transfer , resonator , quantum mechanics , molecular physics , metallurgy
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.