Analysis and Experiment of Laser Wireless Power Transmission Based on Photovoltaic Panel

Abstract

A photovoltaic panels is a device used for converting solar and other energy into electrical energy. In laser wireless power transmission, there is a problem that the conversion efficiency of the photovoltaic panel is not as high as that of a single photovoltaic cell, and the output power is not as large as expected. This is not conducive to the popularization and use of wireless power transmission via laser. It is important to find out why the output power of the photovoltaic panel irradiated by lasers is not high. According to the laser intensity distribution equation, it is deduced that the laser in a very small area has an equivalent uniformity intensity distribution through the comparative calculation of the light intensity of two adjacent points. Then, the input non-uniform laser can be broken down into many equivalent uniform small lasers with different light intensity values. Based on this theory, the photovoltaic array model under laser was established, and it was simulated by MATLAB/Simulink. The simulation results reveal that the greater the difference between the light intensity values of these small spots, that is to say, the more non-uniform the laser, the lower the output power of the photovoltaic module illuminated by it. A multi-wavelength experimental platform was built, and comparative experiments of laser wireless power transmission were carried out using three kinds of lasers: 808, 532, and 1030 nm. The experimental result was in good agreement with the simulation result. The above results show that the deduced theory and the model based on it are correct.