Authors : N. Siddaiah, K.S.N. Murthy, D.V. Rama Koti Reddy, T. Vijay Srinivas, S. Krishna Chaitanya and A.L.G.N. Aditya
Abstract: Harvesting the energy from environmental resources has become a very prominent role in generating power for various applications. There are many ways to extract the energy, in this study, the charge generation was done through the piezoelectric method using a cantilever beam. This beam will sense the vibrations with very low frequencies (in order of <1 kHz) and generates the charge accordingly. This technology is used for both portable and wearable devices. Energy harvesting through piezoelectric devices is very economical since it does not use any external power supply. In this study, a unimorph cantilever in macro scale with non-traditional geometry is investigated for charge generation. COMSOL multi-physics 4.3 is the software which is used for the simulation and analysis. The piezoelectric energy harvester comprises of an active Piezoelectric layer (PZT-5 H) on the top and a steel substrate at the bottom. The results of the traditional geometry which is rectangular shape and the proposed (T) structure are compared. Simulation results shows that the proposed structure has a very low resonant frequency and higher average strain.
N. Siddaiah, K.S.N. Murthy, D.V. Rama Koti Reddy, T. Vijay Srinivas, S. Krishna Chaitanya and A.L.G.N. Aditya, 2015. Modelling of New PZT Energy Harvester for Non-Traditional Geometry with a Lower Resonance Frequency. Journal of Engineering and Applied Sciences, 10: 137-142.