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Title: Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator
Authors: Nguyen, Minh Sang
Yoon, Yong-Jin
Kwon, Ojin
Kim, Pilkee
Keywords: DRNTU::Engineering::Mechanical engineering
Magnetic Devices
Energy Harvester
Issue Date: 2017
Source: Nguyen, M. S., Yoon, Y.-J., Kwon, O., & Kim, P. (2017). Lowering the potential barrier of a bistable energy harvester with mechanically rectified motion of an auxiliary magnet oscillator. Applied Physics Letters, 111(25), 253905-. doi:10.1063/1.4994111
Series/Report no.: Applied Physics Letters
Abstract: In this study, we propose a bistable energy harvester with an auxiliary magnet oscillator (BEH-O), whose motion is mechanically rectified to enhance its broadband energy harvesting performance. The design of the proposed BEH-O system is based on local modification of the double-well potential. The auxiliary oscillator with the mechanical rectifier is designed in such a manner that its rectified half-sine motion tends to reduce the saddle barrier of restoring potential, leading to a possibility of an easier escape from the potential well, while keeping other parts of the potential, thereby maintaining high-energy orbital motion. Consequently, the lower bound of the operating frequency band of the BEH-O is reduced, when compared to its conventional counterpart, i.e., conventional bistable energy harvester (CBEH), while its upper bound remains unchanged. Such a broader frequency band of the BEH-O can be directly compared with that of the CBEH, as there is little difference in the high-energy orbital motion between the two. This beneficial effect of the BEH-O system is theoretically and experimentally supported by bifurcation analyses and frequency response analyses.
ISSN: 0003-6951
DOI: 10.1063/1.4994111
Rights: © 2017 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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