Analysis And Design of LCLC-LC Compensated ECPT System with Load Adaptive Characteristic

The application of electric field coupling wireless power transmission technology in unmanned aerial vehicles(UAVs) can effectively improve the endurance capability and work efficiency of UAVs. However, frequently taking off and landing of UAVs will cause the entire power receiver of the wireless charging system to move in/out, resulting in system detuning, device voltage and current spikes, high no-load power and other problems. In response to the above problems, this paper proposes an analysis and design of LCLC-LC compensation ECPT system with load adaptive characteristics. This paper establishes the mathematical model of the LCLC-LC compensation ECPT system, and derives the constant voltage output parameter conditions when the power receiver is moved in based on the topological output characteristics. The system can achieve zero phase angle (ZPA) under different load resistance conditions. It also analyzes the low power state after the power receiver is removed. Based on this, the system parameter design method is given. Finally, the output characteristics of the system and the effectiveness of the system design were verified through simulation.