Design of Piezoelectric Energy Harvester Generating Power over a Range of Excitation Frequencies Using
Today, there is a real desire to develop the piezoelectric power harvester to enhance the performance of Wi-Fi sensors and low-power devices to use them in heavy weather for longer times. In this study, the harvester model built from piezoelectric bimorphs called; “Piezo Bending Actuators 427.0085.11Z” from Johnson Matthey, N42 magnets, and some electrical parts such as; accelerometer, shaker, HP 54601B oscilloscope used in the experimental setup.
The results show, that the system frequency has an inverse relationship with a gap between magnets, where the frequency increases 100% as the distance decreases from 4.6mm to 0.7 mm. In addition, the amplitude of increases by 104% as the gap decreases from 4.6mm to 0.7 mm. Also, the production power and amplitude have an inverse relation with the magnet distance. Keywords: power harvester, magnetic gap, tuned magnetic force, piezoelectric, resonances.