Magnetic Beam Plucking in a Piezoelectric Energy Harvester with Rotating Proof Mass
نویسنده
چکیده
This article presents a simplified model for studying the main parameters for magnetically plucking piezoelectric beams in energy harvesting devices. The advantage of magnetic plucking is that there is no impact on the brittle piezo material. However, achieving a good release of the piezo beam is more difficult than with fingers or plectra. The influence of different magnet arrangements, the gap size and the velocity of actuation is discussed and the model is supported by experimental voltage measurements on a harvesting device with rotational proof mass. The results show an advantage for repulsive magnet arrangements and a small initial gap size.
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