VERILOG Modeling Research Of Micro Energy Devices

In recent years,environmental energy collection technology has increasingly become the focus of scientific and technological development.To develop energy collection technology,on the one hand,is to make full use of renewable energy in the environment,such as in the field of clean energy vehicles,in order to cope with environmental pollution,climate warming,fossil energy consumption and other issues;on the other hand,because of the long-term and reliable demand of energy supply in the field of current unattended network communication nodes of MEMS,which does not need frequent manual maintenance,this requires nodes.In order to collect energy steadily from the environment to maintain its operation,energy management systems usually need to use micro-energy collection devices.At present,Simulink model is the main analysis model for micro-energy devices.This simple mathematical model can not form hardware circuit,and it is difficult to connect with the hardware model of signal amplifier circuit and energy management circuit which can be realized in the future,so as to form a composite energy system model,which limits the more accurate analysis of the behavior of the composite energy system.And forecast.Firstly,the mathematical models of photovoltaic cells,piezoelectric energy collectors and lithium batteries are established.On the basis of the above mathematical models,the hardware circuit model is established by using Verilog,and the parameters of each model need to be measured by experimental methods.In the photovoltaic cell model,single-tube equivalent circuit model is used to input voltage and illumination intensity parameters to get current output;in the piezoelectric energy collector model,cantilever equivalent circuit model is used to input sinusoidal acceleration signal parameters to get resonance frequency and real-time voltage output;in the lithium battery model,PNGV equivalent circuit model is used to input current parameters to calculate the current of lithium battery.Charged state SOC and real-time voltage output are obtained.In the aspect of hardware programming,the basic operation modules such as addition,subtraction,multiplication,division and e-exponential operation are designed and used to complete the Verilog model design of photovoltaic and lithium batteries.At the same time,the trigonometric function cordix operation module and the second-order differential equation operation module are designed,and the Verilog model design of piezoelectric energy collector is completed.After the hardware circuit model is built,top-level modules and instruction modulesare added to integrate the discrete device models into an overall project.The function of selecting instructions and inputting experimental parameters from PC to FPGA is realized,and the output results are obtained after calculation by FPGA.Comparing the running results with the experimental data,they are in good agreement to a certain extent,which confirms the accuracy of the hardware circuit model.The data obtained by this model can describe the changes of voltage,current and power of photovoltaic cells,piezoelectric energy collectors and lithium batteries,and provide reference for optimizing and designing relevant circuit models.