MSMA-properties-test Platform And Vibration Energy Harvester

With the continuous development of wireless sensor networks, wireless communicationtechnology and micro-electro-mechanical systems, micro-energy power systems whichassociated with that are getting people more attention. Mechanical vibration energy iswidespread in nature. Research shows that the vibration energy of the nature can be convertedinto electrical energy using the inverse effect of magnetically controlled shape memoryalloy(MSMA), and supply power for wireless sensor networks and micro electro-mechanicalsystem. Therefore, this thesis briefly introduces the MSMA-properties-test platform,researching and designing the MSMA vibration energy harvester.Firstly, the thesis introduces the research status of vibration energy harvesting technology athome and abroad, analyzing the significance of the thesis research. In addition，the five maincharacteristics, deformation mechanism and relationship between the stress and deformationof the MSMA were introduced. And MSMA-properties-test platform was introduced andstudied.Secondly, the principle of MSMA vibration energy harvester was analyzed theoretically,providing the basis for the designing of the MSMA vibration energy harvester and theoreticalbasis. Electromagnetic-mechanical transformation constitutive model of vibration energyharvester based on analyzing and researching on the principle of MSMA vibration energyharvester MSMA was established.What’s more, according to the characteristics of MSMA material, the sizes and othervarious parameters of the coil winding, permanent magnets, magnetic core material wereanalyzed and determined. Then magnetic circuit of vibration energy harvester wastheoretically analyzed and modeling, using ANSYS13.0software to finite element modelingand simulation. So the structure parts parameters of the MSMA vibration energy harvesterthat set before could be confirmed by simulation of magnetic circuit. And the magnetic fluxdensity could suit the requirements of MSMA. Then the prototype of MSMA vibration energyharvester was designed.Finally, some parameters in the established model were determined through calculation,analysis. Then the output voltage waveform was captured under different mechanicalvibration frequency by MATLAB simulation. In addition, an experiment is carried out on the designed vibration energy harvester prototype. In the case of the push rod under differentfrequencies, different form the size of the force, voltage waveform was detected at the end ofthe winding coil. So MSMA material can be applied to the field of vibration energy harvester.And the research achievements of this thesis were summarized, pointing out the furtherresearch direction.