Some basic Q & A on wireless power transfer

Author

Jongmin Park ; Hyunjin Shim ; Yoon Goo Kim ; Sangwook Nam

Author_Institution

Inst. of New Media & Commun., Seoul Nat. Univ., Seoul, South Korea

fYear

2014

fDate

6-9 Oct. 2014

Firstpage

961

Lastpage

964

Abstract

This paper presents some questions and answers on the wireless power transfer. Firstly, it investigates the physical limitation of a wireless power transfer using spherical modes. It is found that there is a limitation on the transfer efficiency depending on the distance between the resonators and efficiency of antennas. Secondly, we compare the performance of WPTS with respect to the source type. In addition, a method is suggested for efficient WPT when the distance between antennas is varied. Thirdly, a time division method is suggested for WPTS to charge multiple receivers. Finally, we present an analytic formula which can be used to differentiate Inductive Coupling and Magnetic Resonance Coupling which are ambiguously used in wireless power transfer system.

Keywords

antennas; electromagnetic coupling; inductive power transmission; magnetic resonance; resonators; WPTS; antennas; inductive coupling; magnetic resonance coupling; receivers; resonators; time division method; wireless power transfer system; Antennas; Circuit theory; Couplings; Impedance; Receivers; Resonant frequency; Wireless communication; Inductive Coupling(IC); Magnetic Resonance Coupling(MRC); frequency tracking; multiple charging; physical limitation; wireless power transfer;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2014 44th European

Conference_Location

Rome

Type

conf

DOI

10.1109/EuMC.2014.6986596

Filename

6986596