Research On Electronic Switching Circuit Design Of Triboelectric Nanogenerator For Wind Energy Harvesting

The demand for energy continues to rise as human living standards increase globally.Triboelectric nanogenerators(TENGs)stand out among the various energy harvesting technologies because of their ability to harvest multiple forms of energy,and are one of the hot research areas of the moment.However,the current development process is still far from adequate and one of the important ways to obtain high performance of the generator in various scenarios is through prototype design along with the design of matching power management circuits.In this thesis,we have explored the possibilities of combining the structural design of a wind energy-based triboelectric nanogenerator with an electronic switching circuit,and designed a self-switching module using the characteristics of the components themselves,to be placed in the power management circuit.The circuit has been shown to have a higher load carrying capacity and to charge faster than a generic circuit.This also provides a reference design case and experimental basis for future application scenarios,and is another step forward in advancing the industrialisation of triboelectric nanogenerators.The main work carried out is as follows:(1)The basic theory and characteristics of the operating mode of triboelectric nanogenerator are analysed and combined with the characteristics of the wind energy environment.A dual rotating wind energy harvesting device based on the independent layer mode is developed to systematically harvest wind energy from the environment,and the physical field is simulated and analysed by COMSOL Multiphysics software to initially determine the magnitude of the electrical charge.(2)The design of the power management circuit after energy harvesting is based on the characteristics of the friction nanogenerator operating in independent layer mode to generate electrical signals.The circuit is divided into three modules: rectifier module,self-switching module and filter module,and each module of the power management circuit is designed separately to study its operating principle and carry out simulation analysis.Preliminary determination of parameters such as component type and output.A power management circuit based on friction nanogenerator technology is designed.(3)Based on the simulation analysis of the prototype and the power management circuit,the prototype and the circuit are materialised using a 3D printer and Altium Designer software respectively.At the same time,a suitable test field was set up and appropriate test methods were selected to perform basic performance tests on the designed wind energy collector and power management circuit modules.(4)The output power and charging speed of the circuit were tested using a combination of a dual rotary wind energy collector and a self-switching circuit.The experiments show that the self-switching circuit has a higher load carrying capacity and the energy stored in the capacitor is 109.7 times higher in the same time compared to the generic circuit under the same circumstances.It was also tested that the system could keep the scientific calculator in proper working condition in a real environment by building a simulated real environment platform.