Feasibility study of a 3D vibration-driven electromagnetic ...
2012-11-7 · The device consists of a movable circular-mass patterned with three sets of double-layer aluminum (Al) coils, a circular-ring system incorporating a magnet and a supporting beam. ... mode of 1285 Hz is an out-of-plane motion, while the second and third modes of 1470 and ... shows a schematic drawing of the proposed 3D vibration-driven ...
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