Design Of Wireless Charging Equipment Based On Electromagnetic Induction Theory

Wireless charging is a kind of charging technology that can realize non-contact radio energy transmission.In this paper,the development of this new type of non-conductor charging mode is being actively explored,and the shortcomings of this charging mode are analyzed in depth and detail.Finally,a radio energy transmission system with adjustable charging power is designed.The system also has the function of real-time detection of charging voltage state and digital display.Firstly,the research background,significance,domestic and foreign development status and development trend of radio energy transmission equipment are introduced.According to Faraday's law of electromagnetic induction and maxwell's theory of electromagnetic field,the model and equivalent circuit of the system are analyzed,the theoretical basis of the system is elaborated,and the basic circuit structure of the wireless charging equipment system including transmitter and receiver based on electromagnetic induction theory is also proposed.In the following chapters,further analysis and research on the electromagnetic induction theory of wireless charging equipment system are made.Secondly,the power generation circuit,square wave signal generation circuit,power amplification circuit,transmitter of LC resonant circuit and receiver of LC resonant circuit,rectifier circuit,filter circuit and load circuit are calculated and analyzed,and the specific implementation scheme and device model of the circuit are determined.Through the simulation of Protues circuit and the real object,it is verified that the basic circuit of the wireless charging equipment system based on the electromagnetic induction theory can achieve the expected goal and has good performance.Then,further optimization is made for the basic system of the wireless charging device based on the electromagnetic induction theory.The optimization is divided into two parts.Optimization 1: the timing/interruption technology of the single chip microcomputer is used to generate changing control signals and change other circuit states of the system,so that the whole system has the regulation function of multi-gear,which is controlled by pressing the button.Optimization 2: the combination of A/D conversion,LED display module and MCU control technology enables the system tohave real-time detection of the load side output voltage and digital display function.Finally,this paper proposes a wireless energy transmission system with adjustable charging power,real-time detection of charging voltage status and digital display.The circuit simulation of the optimized system was carried out by using the Protues simulation software,and the voltage value of each tap was tested.The results of tap function were displayed horizontally and vertically in terms of frequency change and duty cycle change,and the digital voltage detection and display function was verified to be consistent with the expected realization.Finally,a series of tests and debugging were carried out on the physical object of the whole system.Finally,a wireless charging device based on the electromagnetic induction theory with the desired function optimization and high performance was presented.