Abstract

We measured the average power of thin linear-driven generators for use in card-type mobile communication terminals, which produce electricity from mechanical movement. A Long Voice Coil Generator driven by free fall energy, stroke length : 30 mm , yoke width : 120 mm, and thickness : 12 mm generates 6.7 mW with efficiency of 51%. A cellular phone sized-Voice Coil Generator driven by free fall energy and a spring, stroke length : 50 mm , yoke width : 20 mm, thickness : 12 mm generates 9.6 mW with efficiency of 32%.

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