Research And Design Of Magnetically Coupled Resonant Household Photovoltaic Wireless Power Transmission System

Wireless power transmission technology is a kind of power transmission method which does not use metal wires or other physical contacts,and transfers energy to electrical equipment in space.It has incomparable advantages such as convenient,safe and flexible conductor transmission.With more and more attention to new energy in recent years,solar energy as a clean and renewable energy,photovoltaic power generation technology has been vigorously promoted.It is of great significance to apply wireless power transmission technology flexibly to photovoltaic power transmission and realize the whole process from generation,transmission to distribution.In this paper,the magnetically coupled resonant household photovoltaic wireless power transmission system is studied as follows:(1)By comparing and analyzing the advantages and limitations of the mainstream wireless power transmission technology,we decided to adopt the magnetic coupling resonance wireless power transmission(MCR-WPT)mode for the requirement of household photovoltaic wireless transmission,and then analyzed the operation principle of the magnetic coupling resonance technology in detail.(2)Modeling and analysis of the magnetically coupled resonant wireless power transmission system,analyzing the circuit topology,and comparing the influence factors of the output power of SS and SP.The resonant frequency and inductance of the coil are designed.The influence of the coil distance,frequency,input voltage and quality factor of the magnetically coupled resonant wireless power transmission device on the output characteristics of the system is studied by using MATLAB.The influence of the parameters on the transmission characteristics of the system is also studied.(3)The design of magnetically coupled resonant household photovoltaic wireless power transmission device uses the photovoltaic module of household photovoltaic as power supply,and transmits it to the device through MPPT step-down module.The design of household photovoltaic magnetically coupled resonant device mainly includes five parts: signal generating module,driving circuit,inverting circuit,coupled resonant module and rectifying circuit.(4)Finally,the simulation module of MATLAB/simulink is used to construct the simulation results.The simulation results verify the influence of parameters on transmission characteristics,and verify the correctness of the previous theory.Then connect the welded physical device,select the sunny weather test,measure the signal frequency,delay line voltage waveform,multimeter acquisition device data,adjust the distance between coils on the impact of small load bulbs,complete the application of photovoltaic electricity forwireless power transmission.