Study Of Wind Energy Acquisition And Conversion Based On Piezoelectric Effect

With the rapid development of social economy,more and more attention has been paid to energy shortage and environmental pollution.At present,our country’s energy supply is mainly based on the consumption of non renewable energy,which is not conducive to the sustainable development of the ecosystem,but also caused great pollution to the natural environment.Therefore,the development and utilization of renewable clean energy is imminent.According to the existing research,the piezoelectric material without electromagnetic interference will bend under the action of mechanical force,and produce the potential difference between the two ends to realize the conversion between the mechanical energy and the electric energy.Piezoelectric material itself has the advantages of low cost and simple structure,and it can be processed into arbitrary shape.Due to the advantages of high efficiency,low cost and cleanliness,piezoelectric materials have attracted close attention from governments all over the world,focusing on the future and development direction of piezoelectric power generation.In this thesis,the current development of piezoelectric power generation technology at home and abroad is summarized from three aspects of the new energy acquisition equipment,energy conversion efficiency and energy collection and conversion circuit,and then the theoretical basis and power generation characteristics of the piezoelectric power generation are introduced.Based on the positive piezoelectric effect,a piezoelectric power generation device which can use low wind speed and wind to drive the vibration of multiple piezoelectric plates is designed.The method of constructing the pressure generating component is used to avoid the problem of small power generation of the piezoelectric sheet.The device uses a wind driven cantilever beam type pressure generating component,the piezoelectric vibration and power generation.Based on the basic theory of piezoelectric materials,the electric power output model of the piezoelectric power generation device is set up,and the relationship between the output power of the piezoelectric power generation device and the parameters of the piezoelectric sheet is obtained,and the design of the device is optimized by the evolution algorithm based on the state space model to achieve the purpose of improving the power generation power of the piezoelectric power generation device.The experimental test of the energy conversion device is carried out.The experimental results show that the device can efficiently transform the environmental energy to the electric energy.The wind power generation device designed in this thesis can drive the cantilever beam type power component through the wind,and the electric energy generated by the vibration of the piezoelectric sheet passes through the rectifying circuit,the energy storage circuit and the electric energy conversion circuit for the load.The structure of the pressure generating component in the power generation device is beneficial to the improvement of the power generation of the piezoelectric power generation device,and the optimum working environment of the device is realized by optimizing the design of the piezoelectric power generation device.The power plant designed in this thesis can provide reference for the design and optimization of similar devices,and also provides a new idea for the development and utilization of renewable clean energy.