关键词: 车辆工程, 电动汽车, 无线充电, 智能控制, 自动循迹, 插补耦合技术

Abstract: In order to solve the problem that the fixed-point setting of electric vehicle charging piles limited the battery endurance, a wireless charging method for electric vehicles based on interpolation coupling technology was proposed. Firstly, the interpolation coupling technology was used to drive the motor to precisely control the coil positioning, so that the charging coil was charged within the effective charging distance. Furthermore, the charging module adjusted the charging current according to the current feedback signal, and charged quickly according to the floating charge, constant current and second-order constant voltage processes. Next, the theoretical values of the matching charging radius R and charging distance D were calculated according to Biot-Savarts law. Finally, MATLAB software simulation experiments were conducted to verify the optimal values of the theoretical R and D. The results show that the positioning control based on the interpolation coupling technique can ensure that the charging coil transmits the maximum power, which not only solves the constraint of fixed-point charging, but also improves the wireless charging efficiency; the multi-stage fast charging process eliminates the effect of current variation and continuous charging on battery life. In addition, the magnetic flux through the charging coil is maximized at R=40 cm and D=10 cm, which is the optimal design.

Key words: vehicle engineering, electric vehicles, wireless charging, intelligent control, automatic tracking, interpolation coupling technology