Experimental verification of the widening effect using a stopper in magnetostrictive vibration power generation

Abstract

　Vibration power generation has been attracting attention as an environmental power generation method. On the other hand, there is a problem that stable power generation cannot be achieved due to changes in vibration frequency. In this study, we aimed to realize a wideband mechanism to cope with the frequency variation of magnetostrictive vibration power generation. For this purpose, we devised a stopper mechanism to contact the fixing bolts of the generator. We have demonstrated that this mechanism widens the bandwidth of power generation to the high frequency side. We have also demonstrated that the output power can be increased by adjusting the amplitude of the contact under vibrations with fluctuating frequency. This achievement means that magnetostrictive vibration power generation can be performed stably under actual vibration environments.