Title :
On the efficient wireless power transfer in resonant multi-receiver systems
Author :
Ricketts, David S. ; Chabalko, Matthew J.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
In this paper we present an analysis of resonant wireless power transfer in systems with multiple receivers. We show that maximum power transfer can be achieved when the source is impedance matched to the set of receivers, i.e. matched to their equivalent impedance as seen by the source. The interaction of the receivers, or coupled modes, simply represent an interdependence of impedances that can be modeled and impedance matched. We explore three methods to achieve impedance matching: frequency tuning, impedance transformation and resonant tuning and show that the later two can achieve the maximum theoretical power transfer for a wide range of coupling between receivers.
Keywords :
impedance matching; inductive power transmission; coupled mode; equivalent impedance; frequency tuning; impedance matching; impedance transformation; resonant multireceiver system; resonant tuning; resonant wireless power transfer; Capacitors; Coils; Couplings; Impedance; Receivers; Resonant frequency; Wireless communication;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572455