A wrist-worn rotational energy harvester utilizing magnetically plucked oriented bimorph PZT thin-film beams

A wrist-worn eccentric rotor-based energy harvester utilizing multiple magnetically plucked flower petal-shaped bimorph lead zirconate titanate (PZT) thin-film beams was designed and fabricated. The bimorph beams were formed by depositing {001} oriented PZT films up to 5.4 μm in thickness on both si...

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Bibliographic Details
Published in2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) pp. 375 - 378
Main Authors Tiancheng Xue, Hong Goo Yeo, Trolier-McKinstry, Susan, Roundy, Shad
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2017
Subjects
Energy harvesting
frequency up-conversion
Magnetic levitation
magnetic plucking
Magnetomechanical effects
Numerical models
piezoelectric
Power measurement
Prototypes
Rotors
wearable
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Summary:A wrist-worn eccentric rotor-based energy harvester utilizing multiple magnetically plucked flower petal-shaped bimorph lead zirconate titanate (PZT) thin-film beams was designed and fabricated. The bimorph beams were formed by depositing {001} oriented PZT films up to 5.4 μm in thickness on both sides of a 50 μm thick nickel foil. The prototype was characterized with an analytical system-level model and a bench-top swing-arm test set-up. The prototype can achieve approximately 40 μW power output from a bench-top pseudo walking motion input. Further simulation suggests that improvement can be made by growing thicker PZT layers.
ISSN:2167-0021
DOI:10.1109/TRANSDUCERS.2017.7994065