TY - JOUR AU - Amer A. Khadim, Waleed K. Al-Ashtrai, PY - 2022/01/14 Y2 - 2024/03/28 TI - Design of Piezoelectric Energy Harvester Generating Power over a Range of Excitation Frequencies Using JF - Design Engineering JA - DE VL - IS - 1 SE - Articles DO - 10.17762/de.vol2022iss1.8683 UR - http://thedesignengineering.com/index.php/DE/article/view/8683 SP - 32 - 40 AB - 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. ER -