Research On Optimization Of EV Dynamic Wireless Charging System Combined With Vehicle Driving Characteristics

The critical current situation of energy and environment has prompted people to turn their attention to the electric vehicle(EV)industry for its zero emission advantage.Electric vehicles are driven by electrical energy,which is cleaner and more environmentally friendly than traditional fuel vehicles.It has become one of the hottest industries in the world.However,the traditional plug-in charging mode for EV has complicated manual operation steps,hidden safety hazards such as connector wear and leakage,and the lack of flexibility in wired charging methods is also an important factor restricting the scale development of EV.The application of wireless power transmission technology to EV charging process can not only improve the automation and intelligence of the charging process,but also increase the charging flexibility.EV dynamic wireless charging technology lays energy transmitting coils under the road surface,and fully utilizes the time and space of the driving process without occupying additional land,further reducing the cost of battery and alleviating the user’s mileage anxiety.This dissertation focuses on the optimization of EV dynamic wireless charging system for high-speed driving scenario.The research focuses on the charging power control of the long-track EV dynamic wireless charging system and the optimization of the parameters of the road-side transmitting coil.The main work of this dissertation is as follows:Based on the long-track EV dynamic wireless charging system,the load circuit equivalence,resonance compensation topology,energy transmitting coil loss and coupling characteristics of the long rail type power transmitting coil are analyzed;Based on the equivalent model of the long rail type EV dynamic wireless charging system using the S-S resonance compensation topology,combining the speed limit and the power consumption per kilometer of EV,the charging power control method in the charging area under variable speed driving is explored and experimentally verified;Based on the equivalent model of the long rail type electric vehicle dynamic wireless charging system using the LCC-S resonance compensation topology,combined with the driving speed limit,energy consumption characteristics,system charging efficiency,the design method of the system’s source-side resonance compensation topology and the parameters of the long rail energy transmitting coil are studied and verified by experiments.Based on the transmitting-side billing and the receiving-side billing,the billing mode of EV wireless charging system is studied.For the two transaction methods of "direct transaction between the power supplier and the user","the power supplier conducts transactions with the user through an intermediary",pricing models for wireless charging are separately formulated,and price guidance strategies for public transportation vehicle users and private car users are separately proposed..