Study on modeling and simulation of Inductively Coupled Power Transfer system with bi-directional energy transfer mode

In Inductively Coupled Power Transfer (ICPT) system, attribute to unidirectional energy transfer, there are many problems such as energy feedback difficultly and low efficiency brought by system open-loop running. This paper put forwards a novel contactless energy bi-directional transfer mode to realize energy exchange between transmitter and receiver. The paper presents a bi-directional energy conversion topology and set up its equivalent circuit and piece-wise state space model. The simulation results show that system resonant state have low harmonic components. It´s benefit to improve system efficiency and minimize EMI interference. The bi-directional energy transfer mode can be used in energy exchange between mobile devices and energy feedback from mobile device to power grid to improve system efficiency.