Design And Control Research On Electric Vehicle Dynamic Wireless Charging System

Due to the recent development of technology in power electronics and smart appliances wireless power transfer developed significantly.The further development in the field of wireless power transfer a new trend was introduced to charge an Electric Vehicle with wireless power transfer while in motion.Electric vehicle dynamic wireless charging system is the improved version of stationary charging of Electric vehicle through wireless power transfer.Wireless Power Transfer is a technology which transfer efficient electrical power without using wires over large air gaps.Due to this reliable technology combustion Vehicle is diverting to Electric Vehicle to reduce pollution and get clean environment.This thesis is the research work on Electric Vehicle Dynamic Wireless Charging System which is based on wireless power transfer magnetic resonant coupling.This thesis present electric vehicle charging while on move.The topology used for electric vehicle dynamic wireless charging system is to get power from primary coil with air gap and charge the battery of vehicle while it is moving.For this purpose two coils are necessary one is primary and the other is secondary coil.Primary coil is buried under the road and connect with power supply back from grid and secondary coil is connected underbody of electric vehicle.High frequency is used for getting high transfer efficiency.Designing of coil and its analysis is performed in this thesis.Short segment rail structure is design for Electric vehicle dynamic wireless charging system.The coil for wireless power transfer which in this thesis designed in software and gets its result.The result for coil design was based on parameters and then checked the result of magnetic flux and vector direction from coil designing simulation.Furthennore in this thesis another software for comparing the results with different parameters was used.From the simulation in this thesis the result for Power vs Frequency is obtained,Transfer distance and Load resistance and Efficiency vs Frequency,Transfer distance and Load Resistance.Next worked on Power stability control strategy which in this thesis used to stable the power while the vehicle is moving.Three Power control strategy is used for stable power.This strategy is the ability of the system to maintain steady state voltages at all the system when disturbance occur.(1)Self-adaptive source voltage control strategy is used when an EV in need of charge enter the power track or an EV leaves the track then the amount charging Electric Vehicles will change.(2)Constant source voltage control strategy is used when there is congested traffic and sufficient power cannot be provided when there are too many charging Electric Vehicles.(3)Particular Power Demand Control Strategy is used for urgent charging request for a particular Electric Vehicle whose battery charging capacity is very low.