Develop a Magnetic Pendulum to Scavenge Human Kinetic Energy from Arm Motion

Abstract:

This paper presented a magnetic pendulum to scavenge the human kinetic energy from arm motion and convert the kinetic energy to electrical energy for portable electronic devices. The harvester mainly consisted of a stator, a rotor and a control circuit. The stator was set of electric coils while the rotor is an eccentric mass made of permanent magnet. A torsion spring was also added onto the rotor such that the motions in both horizontal and vertical directions can be effectively harvested. The energy harvester could be worn on human arm. When the arm was in motion, the device would then generate power. The paper presented a detailed kinematical analysis and power conversion analysis. As a typical case, the device was 40 mm in diameter and 50 g in weight, the simulation showed that when worn on wrist, it could generate about 30 mW during normal walking.

• Periodical: Applied Mechanics and Materials (Volume 590)
• Pages: 48-52
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.590.48
• Online since: June 2014
• Authors: Jie Hong Li, Ming Jing Cai, Long Han Xie*
• Keywords: Energy Harvesting, Human Arm Motion, Magnetic Pendulum

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