Design and Experimental Characterization of a Vibration Energy Harvesting Device for Rotational Systems

This paper presents a new vibration based electromagnetic power generator to transfer energy from stationary to rotating equipment, which can be a newattempt to substitute slip ring in rotational systems. The natural frequencies andmodes are simulated in order to have a maximum and steady power output from the device. Parameters such as piezoelectric disk location and relative motion direction of themagnet are theoretically and experimentally analyzed. The results show that the position that is close to the fixed end of the cantilever and the relative motion along the long side gives higher power output. Moreover, the capability of the energy harvester to extract power from lower energy environment is experimentally validated. The voltage and power output are measured at different excitation frequencies.