Research and application of anti-offset wireless charging plant protection UAV

In the plant protection drone wireless power transfer system, the positional deviation of the transmitting coils and the receiving coils will cause the efficiency of wireless power transmission drops. In view of this problem, an anti-offset constant current wireless power transfer technology by adjusting the duty cycle of the secondary side buck circuit is proposed in this paper. By establishing a theoretical model of wireless power transfer system for plant protection drone, the relationship between positional deviation and charging current and charging power charging efficiency is analyzed. The magnetic field between transmitting coil and the receiving coil is simulated and compared using Maxwell. In order to further verify the correctness of the theoretical analysis, mathcad is used for simulation analysis. Finally, an experimental platform using the design parameters is built to verify the anti-offset performance. The experimental results show that under different misalignment conditions the charging current can be maintained at 2 A. Compared with the traditional wireless charging system, the system efficiency is improved as much as 3.54%.