Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2018
Date : August 28, 2018 - August 31, 2018
In this research, we propose an electromagnetic broadband vibration power generation device based on a magnetic spring resonator using a ring magnet and a cylindrical magnet composite. In proposed design, two fixed ring magnets are placed to hold a moving cylindrical magnet in the middle whose diameter is smaller than the bore of the ring magnet, guided to smoothly move along the axis direction. Also, the fixed magnet is formed by adhering two cylindrical magnets with the same poles facing each other with a soft magnetic material disc sandwiched therebetween. Since the movable magnet is composed of two cylindrical magnets facing each other with the same pole, the minimum point of the repulsive force acting between one ring magnet and the movable magnet exists at a position close to the origin as compared with the conventional type. By analyzing and experimenting it is possible to realize a compact and wideband vibration power generation device with remarkable hardening property compared with the conventional magnetic spring resonator by adopting the configuration of the magnetic spring introducing the ring magnet and cylindrical magnet composite. It also shows that it is possible to adjust resonance frequency and introduce bistability by changing the magnet position.
