Displacement and Magnetic Induction Measurements of Energy Harvester System Based on Magnetic Spring Integrated in the Electromagnetic Vibration Generator

PurposeThe paper presents the design and model of energy harvester prototype consisting of vibration generator and magnetic spring. The developed magnetic spring prototype, which is integrated in the vibration generator, detects several resonance frequencies significant for energy harvester optimization and ensures more applications in engineering technology.MethodsThe magnetic spring with two identical fixed magnets and the movable permanent magnet that levitates between the two fixed magnets in a vertical direction and moves linearly, can harvest multi-directional environment vibration resembled by vibration generator. The magnetic spring acts as the clamping system for the levitated magnet. Mechanical energy gained through vibrations resembled by vibration generator is converted by the magnetic spring into electrical energy.ResultsNumerical calculations and experimental tests including measurements of I-V, total harmonic distortion (THD) of displacements and magnetic induction conducted in Laboratory have been useful to determine the characteristics and performance of the magnetic spring integrated in electromagnetic vibration generator.ConclusionThe I-V impedance measurements have exhibited a significantly stronger dependence on frequencies resonances and the measurements of magnetic induction intensity show the demagnetization and magnetization processes of the levitated permanent magnets.