期刊
APPLIED PHYSICS LETTERS
卷 102, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4803445
关键词
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资金
- Natural Science Foundation of China [51075317]
- Program for New Century Excellent Talents in University [NCET-12-0453]
We investigate a magnetically coupled nonlinear piezoelectric energy harvester by altering the angular orientation of its external magnets for enhanced broadband frequency response. Electromechanical equations describing the nonlinear dynamic behavior include an experimentally identified polynomial for the transverse magnetic force that depends on magnet angle. Up-and down-sweep harmonic excitation tests are performed at constant acceleration over the range of 0-25 Hz. Very good agreement is observed between the numerical and experimental open-circuit voltage output frequency response curves. The nonlinear energy harvester proposed in this work can cover the broad low-frequency range of 4-22 Hz by changing the magnet orientation. (C) 2013 AIP Publishing LLC.
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