The dynamic wireless charging system can significantly reduce the weight and size of electric vehicle(EV)power batteries. Hence it has broad application prospects. A state-space model of dynamic wireless EV charging system is developed first based on the segmented multi-track scheme. Also

a system small-signal model is obtained to describe the dynamic characteristics. Then

with the help of an experimental platform and the actual values of system variables

dynamic changes in system output power and efficiency are analyzed in the dynamic charging process. Furthermore

the transient characteristics in the track switch-on process are investigated

as is the influence of switching position. Meanwhile

experiments are conducted to verify the proposed model and analysis conclusions. This work is supported by National Natural Science Foundation of China(No. 51507168)

National Key Technologies R&D Program(No. 2015BAG17B06)and Beijing Municipal Science and Technology Project(No. D15110900290000).