Drone Charging System Using Wireless Power Transfer by Inductive Coupling

Drones have a wide range of applications in the field of modern agriculture to monitor crops and climatic conditions. Wireless power transfer methodology is used in charging of drone batteries. Hexagonal coil is used in the transmitter circuit (stationary in ground), and multi-turn coil (MTC) is used in receiver circuit (dynamic-present in drone). Transmitter and receiver circuits are constructed with prescribed dimensions and values. This study is based on wireless power transfer using the principle of inductive coupling, and it primarily aims to observe the trends of coupling coefficiency and mutual inductance with respect to various lateral misalignment and to diminish the misalignment conditions if any. An effective method to increase the battery lifetime called the sleep active strategy is discussed in a detailed fashion. An equivalent circuit of the coils is designed on LTspice simulation platform to calibrate its efficiency. The efficiency of the system is verified experimentally. The schematic representation of WPT coils are analyzed in Ansys Maxwell simulation platform.