Experiment of Electromotive Force for Electromagnetic Energy Harvester Considering Design Variables

Abstract

based on magnetic fluid which converts external vibration energy into electric energy using electromagnetic induction method.

Methods/Statistical analysis: There are many ways to obtain electrical energy using mechanical vibration. One is the method of obtaining the electric energy by changing the magnetic flux by moving the permanent magnet in the coil. The other is that the permanent magnet is fixed and the coil moves. Both of these methods require a large source of external vibration energy.

Findings: To evaluate the performance of the energy harvester, the induced electromotive force was measured under various design conditions. The design variables were experimented by varying the amount of the first magnetic fluid. Second, the magnitude of the magnet was different. Third, the size of the container for containing the magnetic fluid is different. Finally, the shape of the ferromagnetic core through which the flux passes is tested differently. Various experiment results were obtained to combine the above three conditions to make the output of energy harvester suitable for the usage environment.

Improvements/Applications: This study will contribute to the design of electromagnetic energy harvester. Particularly, it will play an important role in researching the induced electromotive force depending on the size of the magnetic fluid container, the amount of the magnetic fluid, and the shape of the ferromagnetic core.

Keywords: Design variable, Electromotive force, Electromagnetic Energy harvester, Ferrofluid, Permanent magnet, Combination.