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Self-priming dielectric elastomer generator design
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Paper Abstract

Dielectric elastomer generators (DEG) are variable capacitor power generators that are a highly promising technology for harvesting energy from environmental sources because they have the ability to work over a wide frequency range without sacrificing their high energy density or efficiency. DEG can also take on a wide range of configurations, so they are customizable to the energy source. A typical generation cycle requires electrical charge to be supplied and removed from the DEG at appropriate times as it is mechanically deformed. The manner in which the DEG charge state is controlled greatly influences energy production. The recently developed self-priming circuit can provide this functionality without any active electronics, but it is not configurable to match the generator and its energy source. In this paper a highly configurable self-priming circuit is introduced and an analysis of the self-priming DEG cycle is performed to obtain design rules to optimize the rate at which it can boost its operating voltage. In a case study we compare the performance of an initial prototype selfpriming circuit with one that has been intentionally optimized. The optimized generator voltage climbed from 30 V up to 1500 V in 27 cycles, whereas the same generator required 37 cycles when the suboptimal self-priming circuit was used.

Paper Details

Date Published: 5 April 2012
PDF: 9 pages
Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 83401Y (5 April 2012); doi: 10.1117/12.915464
Show Author Affiliations
Thomas McKay, The Univ. of Auckland (New Zealand)
Benjamin O'Brien, The Univ. of Auckland (New Zealand)
Emilio Calius, Industrial Research Ltd. (New Zealand)
Iain Anderson, The Univ. of Auckland (New Zealand)

Published in SPIE Proceedings Vol. 8340:
Electroactive Polymer Actuators and Devices (EAPAD) 2012
Yoseph Bar-Cohen, Editor(s)

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