Micro linear generator for harvesting mechanical energy from the human gait

Peng Gui, Fang Deng, Zelang Liang, Yeyun Cai and Jie Chen

Energy, 2018, vol. 154, issue C, 365-373

Abstract: A type of multipolar linear permanent magnet generator (MLPMG) was developed in order to harvest human lower-limb motion energy to meet the increasing power supply needs of portable electronic devices. A large acceleration of the foot, particularly at the heel, was noted when analyzing human lower-limb motion during walking, so an energy harvester was placed on the heel. A series of MLPMGs were then designed and the static magnetic induction intensity vector diagram was obtained from each. A key parameter of MLMPG efficiency was found to be the gap between the stator and mover. Another important factor is the thickness of the mover spacers between magnet pieces. Finally, a number of experiments were conducted, which supported the conclusion that the output power of harvesters have negative relation with length of gap and thickness of spacers. It was found that a subject, walking at a speed of 5 km/h with a matched resistor load, can produce an output power of 20 mW.

Keywords: Human gait analysis; Acceleration data; Mechanical energy; Harvester; Magnetic induction vector; Output power density (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:154:y:2018:i:c:p:365-373

DOI: 10.1016/j.energy.2018.04.123

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