The Structure Optimization And Output Characteristics Study Of Permanent Magnet Linear Vibration Generator

Today,coal,oil,natural gas and other fossil fuels continue to reduce and the problem of air caused by the use of fossil fuels have attracted global attention,and the development of new energy sources from renewable energy has become an important area of research.Vibration energy as new energy research hotspots has its particular advantage.It exists widely in the natural environment and has high power density.The vibration energy can be converted into electric energy by using the vibration generating device.According to the law of electromagnetic induction and finite element theory,two types of permanent magnet linear vibration generator had been designed,including pole shoe vibration generator and coreless vibration generator.The magnetic yoke,permanent magnet size and vibration structure of the pole shoe vibration generator were designed.The shell material of the coreless vibration generator,the permanent magnet material,thickness,width,the spacing between permanent magnet and coil are analyzed.So the structural parameters of the two optimized generators are determined.The output voltage of the permanent magnet linear vibration generator is analyzed,and the factors which affect the output electromotive force are determined.The finite element software is used to simulate and analyze the electromagnetic force of the two kinds of vibration generator in the working state,and the electromagnetic force curve is obtained.The fitting result is good by using the three curve fitting method to fit the electromagnetic force.The relationship between the output voltage and the amplitude and the frequency of the two structures is analyzed by simulation.Simulation results show that the simulation results are consistent with the theoretical analysis.The effect on output power of different coil connection mode is analyzed,and the condition of maximum output power is determined.The output characteristic of the vibration generator is studied by making prototype.The experiment was tested in the electric vibration table.Change the input excitation frequency and amplitude,and record the output voltage of the vibration generator using oscilloscope.The experimental results show that the effective value of the output voltage increases nonlinearly with the increase of amplitude,and increases linearly with the increase of frequency.This conclusion is consistent with the conclusion of simulation analysis;The output voltage and output power in different coil combinations was analyzed,and the maximum output power of the vibration generator in different coil connection mode is determined.The power circuit is designed,and the output voltage is stored after rectifying and filtering.The voltage regulator and the standby power module are designed.The circuit board is fabricated and the processing circuit is tested by the prototype.The experiment results show that the circuit board can output stable voltage and the load can be run normally.