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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 (Pm), it reveals Pm 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.