Analysis of Circular Disc and Bimorph Cantilever Beam Energy Harvesters Under Various Constraint Conditions

Autor: Shahab Khushnood, Kifayat Ullah
Rok vydání: 2021
Předmět:
Zdroj: Journal of Electronic Materials. 50:7165-7173
ISSN: 1543-186X
0361-5235
DOI: 10.1007/s11664-021-09241-8
Popis: Piezoelectric energy harvesting (PEH) remains a key area of interest for academic research due to its fast advancement and growing demand for low-powered electronics. In this study we have investigated various energy harvesting scenarios including PZT bimorph cantilever, circular bimorph with a fixed constraint at the center and at the perimeter, roller constraint at the center and at the perimeter, and circular unimorph disc with a fixed constraint at the center and at the perimeter, as well as a unimorph with two different dimensions. Modeling and simulation are performed in COMSOL for all scenarios starting from an aluminum shim (for stress/strain analysis) then bimorph/unimorph (for analysis of voltage/power). Samples are prepared in accordance with model analysis and tested on a custom-made experimental setup. Simulated and experimental results are compared and found to be in agreement. Surprisingly, a circular unimorph disc with a fixed constraint at the center shows the best result producing 7.1 V at 500 Hz with a broadband curve (450 Hz to 650 Hz). The PZT circular unimorph disc with the highest power density of 1.6234 mW/cm2 is found to be the most efficient variant.
Databáze: OpenAIRE
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