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Experimental comparison of macro and micro scale electromagnetic vibration powered generators

Beeby, S, Tudor, M, Torah, R, Roberts, S, O'Donnell, T and Roy, S (2007) Experimental comparison of macro and micro scale electromagnetic vibration powered generators Microsystem Technologies (doi:10.1007/s00542-006-0374-x).

Record type: Article


Electromagnetic vibration powered generators convert kinetic energy present in the application environment into electric energy. Such generators may be used as an alternative power supply to batteries in wireless sensor systems enabling indefinite and maintenance free operation. This paper presents an experimental comparison between macro and micro scale electromagnetic generators based upon an identical magnetic circuit and explores the influence of size on the performance and behaviour of these devices. The large scale traditionally fabricated generator exhibits the highest power density of 2615 nW/mm3 compared to the microgenerator power density of 47 nW/mm3. The macro scale device achieves the optimum damping conditions where electromagnetic damping equals parasitic damping. The level of electromagnetic damping in the micro scale generator is an order of magnitude less than the parasitic damping due to reduced electromagnetic coupling. This comparison highlights the challenges involved in scaling electromagnetic devices down in size.

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Published date: January 2007
Organisations: EEE


Local EPrints ID: 263760
ISSN: 0946-7076
PURE UUID: 379f3e86-74a7-4c47-b908-e1dc3bc87c9f
ORCID for S Beeby: ORCID iD

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Date deposited: 27 Mar 2007
Last modified: 18 Jul 2017 07:42

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Author: S Beeby ORCID iD
Author: M Tudor
Author: R Torah
Author: S Roberts
Author: T O'Donnell
Author: S Roy

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