Research of Magnetic Coupler Array for IPT System

Chao Hu, Yue Sun, Zhi-hui Wang, Shi-jie Zhou

School of Automation, Chongqing University, Chongqing, China.

DOI: 10.4236/epe.2013.54B204                

Abstract

The advance of Inducive Power Transfer (IPT) system is capable to transfer large power across an air gap of sufficient distance, but the power level and charging area of receiver are limited by the magnetic coupler of IPT system. This paper analyses the correlative factors which effect maximum output power (P_m), it reveals P_m is inversely proportional with magnetic flux of power receiving coils. New ferrite array structure is proposed as the basic part of magnetic coupler that focusing on enhancing the equilibrium of magnetic flux distribution at charging area and increasing power transfer distance. The method of winding on ferrite array is quite flexible and the power transmission distance can be increased by changing the mode of ferrite array windings while magnetic field uniform is reduced, users can chose the suitable mode of winding for different IPT system. Finally the validity of theory analysis is tested by a 3D finite element modeling tool.

Keywords

Inducive Power Transfer; Ferrite Array; Magnetic Coupler; Finite Element Modeling

Conflicts of Interest

The authors declare no conflicts of interest.

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