Coupled piezo-multiple electromagnetic energy harvesting

Abstract

This work studies the performance of a hybrid energy harvester with multiple electromagnetic generators under harmonic and random motions. A reduced order model is derived for numerical analysis. Experiments are conducted to validate the numerical results. Results show that the hybrid harvester with two electromagnetic subsystems can generate sufficient magnitude of power sustained over a large frequency region. Parametric studies are carried out and reported. The proposed harvester is capable of producing high voltage and high current simultaneously. Finally, a finite element model is developed for further analysis to find the optimal position and number of electromagnetic subsystems for enhanced power.

Keywords:

• Energy harvesting
• piezoelectric
• electromagnetic
• hybrid transduction
• finite element modeling