Self-tuning wireless power transmission scheme based on on-line scattering parameters measurement and two-side power matching.
Sub-resonances often happen in wireless power transmission (WPT) systems using coupled magnetic resonances (CMR) due to environmental changes, coil movements or component degradations, which is a serious challenge for high efficiency power transmission. Thus self-tuning is very significant to keep WPT systems following strongly magnetic resonant conditions in practice. Traditional coupled-mode ways is difficult to solve this problem. In this paper a two-port power wave model is presented, where power matching and the overall systemic power transmission efficiency are firstly defined by scattering (S) parameters. Then we propose a novel self-tuning scheme based on on-line S parameters measurements and two-side power matching. Experimental results testify the feasibility of the proposed method. These findings suggest that the proposed method is much potential to develop strongly self-adaptive WPT systems with CMR.
Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha, Hunan, P. R. China, 410073.
Yanting
Y
Luo
Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha, Hunan, P. R. China, 410073.
Yongmin
Y
Yang
Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha, Hunan, P. R. China, 410073.
Zhongsheng
Z
Chen