Mechanism And Experimental Study Of Longitudinal Telescopic Magneto Coupling Piezoelectric Energy Harvester

In recent years,clean energy and renewable energy have become increasingly important in the face of increasingly serious global environmental problems.The power required for electronic devices is mainly generated by conventional electrochemical cells and fuel cells.While these chemical and fuel cells can provide more electricity,they have a limited life,require regular replacement and charging,and the treatment of expired batteries may exacerbate environmental pollution.Therefore,the energy issue remains the major challenge.Therefore,wind,noise,radio waves,and vibrational excitation from the environment can all be used as alternative energy sources for these devices with considerable research value.In this environmental simulation,the vibration is much more attractive due to its versatility.Currently,known mechanisms to derive energy from vibration or motion include piezoelectric generation,electromagnetic generation,electrostatic generation,and magnet conductive mechanism generation.This paper summarizes the research significance and current situation of piezoelectric energy harvesters at home and abroad,analyzes some problems of piezoelectric energy harvesters,and puts forward the design concept of longitudinal expansion magnetic coupling piezoelectric energy harvesters.Design a piezoelectric energy harvester,analyze the working principle,piezoelectric element and the theory of energy harvester system.The simulation analyzes the influence of different interaction modes between its magnets on the piezoelectric energy acquisition system and the influence of nonlinear magnetic force on the bending deformation of piezoelectric elements.This provided the basis for its design and production prototypes.A prototype of the piezoelectric energy harvester was made,the experimental platform was established,and related experiments were performed.The influence of different study variables on its output voltage is analyzed,and the relationship between its load resistance and output performance is obtained.The superiority of the proposed longitudinal expansion magnetic coupled piezoelectric energy harvester is demonstrated.It is proved by experiments that the maximum output voltage of the experimental device is 73.75 V when magnet 1 and magnet 2 repel each other,and the speed of the linear motor is 500 r/min.At this excitation frequency,the output voltages corresponding to the rectangular and circular piezoelectric elements are 48.74 V and 9.37 V,respectively.When the external resistance is 10 KΩ,the maximum power output of the device is 256 m W.Compared with conventional equipment,the output voltage increases by 50% to 60% and the output power by 50% and 40% to 50%.The device can convert vibrational energy into environmental energy and provide power to other electronic devices through a storage circuit.