A hip implant energy harvester

Pancharoen, Kantida, Zhu, Dibin and Beeby, S.P. (2014) A hip implant energy harvester Journal of Physics: Conference Series, 557, p. 12038. (doi:10.1088/1742-6596/557/1/012038).


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This paper presents a kinetic energy harvester designed to be embedded in a hip implant which aims to operate at a low frequency associated with body motion of patients. The prototype is designed based on the constrained volume available in a hip prosthesis and the challenge is to harvest energy from low frequency movements (< 1 Hz) which is an average frequency during free walking of a patient. The concept of magnetic-force-driven energy harvesting is applied to this prototype considering the hip movements during routine activities of patients. The magnetic field within the harvester was simulated using COMSOL. The simulated resonant frequency was around 30 Hz and the voltage induced in a coil was predicted to be 47.8 mV. A prototype of the energy harvester was fabricated and tested. A maximum open circuit voltage of 39.43 mV was obtained and the resonant frequency of 28 Hz was observed. Moreover, the power output of 0.96 ?W was achieved with an optimum resistive load of 250?

Item Type: Article
Digital Object Identifier (DOI): doi:10.1088/1742-6596/557/1/012038
ISSNs: 1742-6588 (print)
Venue - Dates: PowerMEMS 2014, Japan, 2014-10-18 - 2014-11-21
Related URLs:
Subjects: R Medicine > RD Surgery
T Technology > T Technology (General)
Organisations: EEE
ePrint ID: 372380
Date :
Date Event
November 2014Published
Date Deposited: 05 Dec 2014 14:17
Last Modified: 17 Apr 2017 06:59
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/372380

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