Abstract
The automatic electric power generator that utilized self-excited rotation has been investigated in order to supply the information devices with electric power. First, the theoretical analysis was carried out in order to obtain the design parameters under constraints such as the setting space and the source of vibration. As a result, it was clarified that for the optimum design of the device there existed a certain relation among the mass and the capacity and the length. Next, an experiment was performed to penerate electricity by using the device. The experimental results agreed well qualitatively with those from the numerical computational analysis.
