Research On Track Wireless Power Supply Technology Based On Inductively Coupled Power Transmission

With the development of society and the advancement of science and technology,wireless energy transmission technology has become increasingly mature in recent years,providing a new way for power supply and charging of electrical equipment.Compared with the traditional wired power transmission,wireless power transmission has the advantages of easy operation,good user experience,space saving,and immunity from adverse weather such as rain and snow.As a dynamic wireless power transmission technology,wireless power supply system can realize non-electrical direct contact power transmission from static power system to one or more mobile electrical equipment.It is suitable for a variety of scenarios,such as line inspection,AGV logistics,pipe corridor equipment,etc.Although there are many theoretical studies related to wireless power supply,there are still many problems waiting to be solved,such as low system efficiency and susceptibility to external interference.Based on the existing research domestic and abroad,this paper studies track wireless power supply technology,and designs a track wireless power supply system by studying the basic theory and magnetic coupling mechanism.This paper first studies the theoretical model of the wireless power supply system.For the wireless power supply system using the LCC-P compensation structure,an equivalent circuit model of the wireless power supply system is established,and the parameter matching expression and the system output power efficiency expression are derived.The power and efficiency characteristics of the system were drawn using MATLAB programming,and theoretical analysis was performed to illustrate the superiority of the LCC-P compensation.This paper proposes a method to increase the output power based on the influencing factors of the system power,and designs an equivalent inductance compensation structure at the receiving end,which can increase the system output power without affecting the mutual inductance.The feasibility of an equivalent inductor structure was verified by building a Simulink simulation model.In this paper,the multi-load model of the wireless power supply system is modeled and analyzed.The feasibility of the LCC-P wireless power supply system with multiple loads in a single coil is theoretically explained.Simulink is used to build a simulation model,it is verified that the LCC-P wireless power supply system has better multi-load capability.For the magnetic coupling mechanism,using ANSYS Maxwell three-dimensional simulation,the relevant research is carried out on the embedded pickup and the flat pickup.For embedded pickups,the coupling coefficients of various types of magnetic core structures are studied,the magnetic leakage areas of each structure are analyzed,and an E-type magnetic core improvement scheme is proposed.For flat pickups,the effects of different magnetic core laying methods and the height of the pickup on the coupling coefficients are studied,and an improved scheme of the flat magnetic core is proposed.Based on the theoretical research,this paper designs the transmitter control device and the receiver control device,and sets up a wireless power supply system as an experimental platform to verify the theoretical research.The constituent modules and functions of the control device at the transmitting end and the control device at the receiving end are introduced,and the voltage protection circuit at the receiving end is introduced in detail.Using this experimental platform,related experiments of system characteristics and magnetic coupling mechanism are designed.The experimental results can verify the correctness of the previous theory.