Characteristic analysis of electrical generator using nonlinear resonance phenomena

Abstract

This paper deals with characteristic analysis of the equipment which generates electricity by electromagnetic induction phenomena using nonlinear resonance when a permanent magnet passes into magnetic field. If the vibrator is manufactured by a permanent magnet, the vibrator of equipment is floated in air by repulsive force which is caused between the floating magnet and the magnet fixed at lower end of hollow cylinder. Then, the vibrator generates electricity from the motion of period excitation by displacement for the hollow cylinder. In order to clarify the effectiveness of the nonlinear resonance type generator, the vibration experiment was carried out in comparison with the conventional linear type resonance generator. As a result, in the nonlinear resonance generator, two resonance regions appeared in the excitation frequency band of 0 to 18 Hz, indicating that a large amount of power generation can be obtained in the wide excitation frequency band. Moreover, in order to predict the amount of power generation, numerical calculations for forced vibrations in a repulsive-force magnetically-levitated system with a single vertical degree of freedom was carried out.