Title :
Optimization of wireless power transfer for mobile receivers using automatic digital capacitance tuning
Author :
Ricketts, David S. ; Chabalko, Matthew J. ; Hillenius, Andrew
Author_Institution :
Dept. of ECE, North Carolina State Univ., Raleigh, NC, USA
Abstract :
We report on an automatic impedance tuning network for mobile receivers in magnetoquasistatic wireless power transfer (WPT). We experimentally investigate a WPT system with a mobile receiver placed over a 3 × 6 spatial grid and demonstrate that the impedance change due to spatial location can be compensated through the use of two digitally tunable capacitors. We show an improved power transfer efficiency of up to 80% using this technique.
Keywords :
capacitance; inductive power transmission; mobile radio; optimisation; radio receivers; tuning; automatic digital capacitance tuning; automatic impedance tuning network; digitally tunable capacitors; impedance change; magnetoquasistatic wireless power transfer; mobile receivers; optimization; spatial grid; spatial location; Capacitance; Capacitors; Coils; Impedance; Q-factor; Tuning; Wireless communication;
Conference_Titel :
Microwave Conference (EuMC), 2013 European
Conference_Location :
Nuremberg
