Wireless Energy Transfer Control System Design

With the deterioration of the global environment,and the growing lack of primary energy,electrical energy of green energy has been one of the best,and electric vehicles is its leader in the field of transportation applications.Electric vehicle’s power comes from the battery,restricted by the development level of current power battery technology,the size,environmental and life issues,and the long single charge time problem of the battery,which limit the development of electric vehicles has become the main problem.The main classification of charging is as follows:wire and wireless,but there are many problems in wire charging,such as while wire charging is under fast charging mode,its charging current is very large,that will directly affect the local power grids,and indirectly affect the entire power grids.Contact charging’s plug is cumbersome,time-consuming and inconvenience,and the aging wire will bring a series of safe question.In contrast,wireless charging is transmitted wirelessly to the receiving device through a wireless launcher,so that the electric vehicle can be mounted with little or no battery pack,and the increased mileage.In this paper,the control method of wireless charging system based on magnetic resonance technology is studied.The PID controller is used to realize the closed-loop charging,and the safety and reliability of the transmission are improved.The scheme of three-stage charging for the electric vehicle is studied in detai.From the view of mathematics and circuit,the author sets up control algorithm model,for the actual system design.In this paper,the principle of magnetic resonance energy transfer based on the principle of the circuit and the transformer equivalent model are described in two ways.Compared with the four commonly used wireless transmission topology,dual series compensation topology is selected for the system.In the actual implementation of the program,we use a 32-bit MCU as the controllor,through the Bluetooth 2.0 module to communicate,according to the data sent by the receiver to charge the transmitter in real-time adjustment,in order to achieve the software closed-loop design,through APLL technology to complete the tracking of the frequency to achieve the transmitter closed-loop regulation,the final completion of hardware and software design.