Title :
Investigation of power transfer density enhancement in large air-gap capacitive wireless power transfer systems
Author :
Kumar, Ashish ; Pervaiz, Saad ; Chieh-Kai Chang ; Korhummel, Sean ; Popovic, Zoya ; Afridi, Khurram K.
Author_Institution :
Univ. of Colorado, Boulder, CO, USA
Abstract :
This paper introduces a new capacitive wireless power transfer approach with the potential to significantly enhance power transfer density in large air-gap applications. This enhancement is achieved through the use of multiple phase-shifted capacitive plates that reduce fringing fields in areas where field levels must be limited for safety reasons. The effectiveness of the proposed approach is evaluated using an analytical framework and validated using finite-element and circuit simulations. It is shown that a 6.78-MHz eight plate-pair system based on the proposed approach reduces fringing fields by a factor of five relative to a two plate-pair system while retaining the same power transfer density.
Keywords :
finite element analysis; inductive power transmission; capacitive wireless power transfer systems; circuit simulations; finite-element simulations; frequency 6.78 MHz; phase-shifted capacitive plates; power transfer density enhancement; Air gaps; Capacitors; Couplings; Electric fields; Inverters; Safety; Wireless communication; Wireless power transfer; capacitive power transfer; modular architecture;
Conference_Titel :
Wireless Power Transfer Conference (WPTC), 2015 IEEE
Conference_Location :
Boulder, CO
DOI :
10.1109/WPT.2015.7140182