Design And Implementation Of Laser Wireless Energy Transfer And Charging Device

Wireless energy(power)transmission was first proposed by Nikola Tesla.It refers to the process of wirelessly transmitting energy from an energy source to an electrical load.At present,wireless energy(power)transmission has been internationally recognized as one of the most cutting-edge and revolutionary technologies in the field of energy transmission,which will subvert the traditional wired(wire)transmission mode.The long-distance wireless energy transmission technology based on microwave or laser can be directly applied to the wireless power supply of disaster relief emergency,special regions,mobile equipment,military satellites and space weapons.Therefore,the thesis UAV laser energy transmission project,the development of high-efficiency laser wireless energy transmission technology research,has important scientific value and great strategic significance.Research shows that laser wireless energy transmission technology mainly faces the problem of low energy transmission efficiency of the system.To this end,according to the requirements of the project mission,with the goal of improving the efficiency of laser wireless energy transmission,carry out experimental research on high-efficiency laser wireless energy transmission.The main research work and innovations of this article are as follows:(1)The optimal efficiency matching model of each link of the LPT system is proposed: for the problem of low LPT efficiency,focusing on improving laser emission efficiency,laser transmission efficiency,and laser receiving conversion efficiency,exploring the optimal matching mode of each link,the optimal efficiency matching model of the LPT system with the overall energy transfer efficiency as the objective function is established to provide theoretical and technical support for the design of a high-efficiency laser wireless energy transmission experimental system.(2)Established a high-efficiency smart semiconductor laser emission array model:In order to reduce the atmospheric transmission loss,the laser wavelength of the laser atmospheric window is selected,while taking into account the requirements of the project task for small size,light weight and emission power,the one with high electro-optical conversion efficiency is preferred.The 910 nm semiconductor laser(25W)is the basic unit,and 20 such semiconductor lasers and smart chips(STC12C5A602S)are used to build a high-efficiency smart semiconductor laser emission array.The laser light of each array unit is coupled out through the optical fiber to form a high-power(500W)laser emitting device,so as to realize the high-efficiency transmission of local electrical energy in the form of laser beam energy.(3)A high-efficiency laser receiving photoelectric conversion array model is established: in order to maximize the receiving photoelectric conversion efficiency,a910 nm photovoltaic cell with high photoelectric conversion efficiency(10 × 8cm,operating voltage 1.5V,short-circuit current 200 m A)is the basic unit,Use the optimal connection method to build a high-efficiency smart semiconductor laser receiving photoelectric conversion array.Connect the photoelectric conversion array to the DC load(supercapacitor array or lithium battery pack,LED lamp)through the Maximum Power Point Tracking(MPPT)module to achieve efficient reception conversion and charging energy storage of the laser beam energy.On the basis of the above work,a high-efficiency laser wireless energy transmission experiment system was built,and a 500 W laser 60 m energy transfer charging experiment was carried out.The experimental results showed that the energy transfer efficiency at maximum power transmission reached 15%,which verified the feasibility and advanced nature of the scheme in this article have achieved the pre-emptive effect of the subject.