Experimental Study on a Gyromagnetic Piezo-cantilever Generator

摘要

To meet the demands of the rotating structure for self-power, a novel gyromagnetic piezo-cantilever generator (GPCG) excited by the coupling between rotating magnets and those fixed on piezo-cantilever was presented. The influence of magnetic force (number and configuration of the magnets) and rotating speed on energy generation of the GPCG was investigated experimentally. The research results show that there are 9 optimal rotating speeds for the GPCG to achieve peak voltage at speed range of 0-1390r/min. With 1 magnet (?12×2mm~3) fixed on piezo-cantilever, the increasing number of rotating magnets (?12×4mm~3) in the same place (n_s) of the rotator exerts no influence on the optimal rotating speeds, but leads to rising output voltage. At 1042.5r/min, the achieved peak voltages from the GPCG in the case of n_s=1/2/4/6 are 13.2/16.6/23.8/27.8V respectively. The optimal speeds decrease and the peak voltage rises with the increasing number of magnets evenly distributed on the rotator (n_d). In the case of 1 magnet fixed on piezo-cantilever and n_d=l/2/4/8,the optimal rotating speeds and the peek voltages from the GPCG are 708.9/528.2/528.2/264.lr/min and 13.2/16.6/23.8/27.8V respectively.