RESEARCH ARTICLE

Hip-mounted electromagnetic generator to harvest energy from human motion

  • Dan DAI 1 ,
  • Jing LIU , 1,2
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  • 1. Key Lab of Cryogenics and Beijing Key Laboratory of CryoBiomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 2. Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China

Received date: 27 Sep 2013

Accepted date: 18 Nov 2013

Published date: 22 May 2014

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

A type of electromagnetic hip-mounted generator (EHG) is proposed to harvest energy from human hip motion to generate electricity. Based on the law of electromagnetic induction, the EHG generator can convert the kinetic power of the thigh swing into electrical energy during walking or running. To demonstrate the feasibility of the present method, a prototype of the EHG has been designed and fabricated. A theoretical analysis has been conducted to interpret the working behavior of this prototype. In addition, the performance of the system has been experimentally tested through a rotary motor and human body motion. When driven by the rotary motor at a rotation speed of 100 r/min, the open-circuit voltage of this prototype is 2.5 V. Further, a maximum open-circuit voltage of approximately 1 V and a maximum output power of 284 μW could be produced respectively when walking with an EHG at a speed of 1.47 m/s. This handy renewable energy technology is promising as a pervasive electricity generation system for a group of wearable or implanted sensors, actuators and mobile electronics.

Cite this article

Dan DAI , Jing LIU . Hip-mounted electromagnetic generator to harvest energy from human motion[J]. Frontiers in Energy, 2014 , 8(2) : 173 -181 . DOI: 10.1007/s11708-014-0301-2

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