Investigation of Nonlinear Piezoelectric Energy Harvester for Low-Frequency and Wideband Applications
Osor Pertin,
Koushik Guha,
Olga Jakšić,
Zoran Jakšić,
Jacopo Iannacci
Affiliations
Osor Pertin
National MEMS Design Centre, Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, Assam 788010, India
Koushik Guha
National MEMS Design Centre, Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, Assam 788010, India
Olga Jakšić
Center of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy–National Institute of the Republic of Serbia, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
Zoran Jakšić
Center of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy–National Institute of the Republic of Serbia, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
Jacopo Iannacci
Center for Sensors and Devices (SD), Fondazione Bruno Kessler (FBK), Via Sommarive, 18, I-38123 Trento, Italy
This paper proposes a monostable nonlinear Piezoelectric Energy Harvester (PEH). The harvester is based on an unconventional exsect-tapered fixed-guided spring design, which introduces nonlinearity into the system due to the bending and stretching of the spring. The physical–mathematical model and finite element simulations were performed to analyze the effects of the stretching-induced nonlinearity on the performance of the energy harvester. The proposed exsect-tapered nonlinear PEH shows a bandwidth and power enhancement of 15.38 and 44.4%, respectively, compared to conventional rectangular nonlinear PEHs. It shows a bandwidth and power enhancement of 11.11 and 26.83%, respectively, compared to a simple, linearly tapered and nonlinear PEH. The exsect-tapered nonlinear PEH improves the power output and operational bandwidth for harvesting low-frequency ambient vibrations.
