Energy Harvesting for Mobile Computing Joe Paradiso Responsive ...

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4/04 © MIT-ML Dielectric Elastomers under the heel 2-4 mm • Electrostatic generator with silicone rubber or flex acrylic elastomer between the plates – Placed under heel – 2-4 mm of squeeze gives 50-100% area strain – 4 kV across them! – Saw 0.8 Watt per shoe (2 Hz pace, 3 mm deflection) – Estimate that 1 Watt is possible with more deflection Ron Pelrine, Roy Kornbluh - SRI International JAP 36
150 g, 200 mW, 2 Hz Commercial Active Power Generation Cranking and Shaking • 60 turns (1 min) stores 0.6 Watt-hr • 40% efficient • Today’s laptop supply roughly 30-50 W-hr • 1 hour of more of winding (w. heavy spring!) Freeplay (Baygen) • Innovative Technologies Sidewinder • 80 g, 2 mins cranking gives >6 mins cellphone talk
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