Acceleration Magnitude and Resonance Frequency of Piezoelectric Micro Power Generator with Bridge Full Wave Rectifier Storage System

摘要

Piezoelectric Micro-Power Generator (PMPG) is a device used to convert mechanical vibration sources in the environment to an electric power via piezoelectric effects that could be used in specific applications. Experimental setup is conducted in this paper in order to test and study the PMPG capability of powering small device at low frequency applications with bridge rectification system. PMPG is tested with several acceleration magnitude of 0.2 g, 0.6 g, 0.9 g and 1.0 g .and the results shows inversely proportional relationship between the PMPG resonance frequency and its acceleration magnitude due to increasing the damping coefficients, Fabricated PMPG can deliver DC voltage to the final load of 2.21 V, DC current of 0.273μA and charge during one cycle equal to 8.27pC. Based on this results, the PMPG able to power large number of small electronic devices like cardiac pacemaker at low frequency and other medical implants.