| In recent years,drones have been widely used in various scenarios due to their simple operation,low manufacturing cost,good maneuverability,and no casualties.However,due to the limited capacity of the lithium battery carried,the drone’s endurance capability And the operating range is limited,how to charge the drone conveniently and quickly,and realize the autonomous charging of the drone,has become a key issue that needs to be solved on the development road of the drone.Currently,drones are mainly divided into two methods:wired charging and wireless charging.Wireless power transmission,that is,wireless charging technology,is a power supply method that has emerged in recent years.The magnetic coupling induction wireless power transmission technology has the characteristics of large transmission power,high transmission efficiency and suitable for short-distance transmission.The ability to transmit power is of great significance and practical value.In view of this,this article uses the principle of magnetic coupling inductive wireless power transmission,adopts a bilateral LCC compensation network structure,and designs a threecoil structure for inductive coupling,which can realize wireless charging of drones when the primary and secondary coils are not completely aligned.The main research contents are as follows:This article first explains the history of drones and the reason that hinders their development is endurance,introduces the current research status of drone charging at home and abroad,studies and compares the advantages and disadvantages of four mainstream wireless power transmission technologies,and proposes A small UAV wireless charging system based on the principle of magnetic coupling induction.The output characteristics of the four basic compensation networks and the bilateral LCC compensation network are analyzed using the equivalent model of the mutual inductance of the loosely coupled transformer.Aiming at the problem of insufficient anti-offset ability of the traditional loosely coupled transformer,a three-coil transmission structure was designed and simulated and analyzed by ANSYS Maxwell software.Secondly,the overall structure of the magnetic coupling induction wireless charging system based on bilateral LCC is described,and the inverter circuit,PWM signal generating circuit,driving circuit,rectifier filter circuit,DC-DC circuit,charging and discharging circuit,and sampling circuit are circuited.design.Then using Maxwell and Simplorer software joint simulation to verify that the designed system can carry out wireless power transmission,and build a magnetic coupling induction wireless charging experimental platform based on bilateral LCC.When the air gap between the primary and secondary sides is 30 mm,its transmission efficiency It is 69.1%,which basically meets the design requirements.Finally,the influence of the horizontal displacement and vertical displacement of the primary and secondary coils on the output characteristics of the system is analyzed. |
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