Design Of Low-power Charger Based On Radio Wave

With the development of the times,technology is also progressing.Our daily life has become colorful,Some electronic devices are also becoming more and more popular such as: cell phones,laptops,tablet PCs,music players and so on.These electronic mobile devices require a fixed power supply to obtain power,and cable charging is a common way to charging mobile electronic equipments so far.Cable charging is that there needs cable connection between the electronic equipment and power to work properly.However,this charging method has a lot of insufficients and defects.Therefore,the research on wireless low-power transmission technology has become a new field that needs to be studied at present.The paper analyzes some mainstream wireless charging methods on the market,points out the advantages and disadvantages of different wireless charging methods and the specific application environment,then introduces the design of low-power charger based on radio wave by contrast.On the basis of analyzing the principles of several mainstream wireless charging,the method of remote charging based on radio wave is improved,and the actual experimental results showed that this method is effective.The main contents of this paper are as follows:First,Analysis the theory of low-power charger based on radio wave.Introduced the working principle of remote charger based on radio wave.Radio waves are mainly generated in the transmitter side of the current changes in the strength of the conductor,and radio waves can carry energy and transfer energy.At the same time,when the radio waves pass through the space to the receiving end,the electromagnetic field caused by the electric wave changes will produce resonance effect,will produce the current in the conductor at the receiving end,and finally realize wireless charging by radio wave.Second,the the selection and design of the low-power charger based on radio wave,Introduced the selection and design of the transmitter circuit,the power amplifier circuit,the transmitting coil,the receiving coil,the receiving circuit,the rectifier filter circuit and the inverter voltage regulating circuit of remote charging based on radio wave.Last,Focus on the energy transfer process and the charging distance,charging rate and safety of the low-power charger based on radio wave,Matlab simulate analysis the transmitter module.The low-power charger based on radio wave transmission experments carried out on the basis of theoretical analysis and simulation.In the distance of 55 cm,the receiving side indicator light can be lighted,enabling the transmission of power through radio wave propagation.When the transmission distance is 20 cm,the charging efficiency reaches the highest,and the actual measurement is 52%.