2019
DOI: 10.1088/1361-665x/ab1931
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Exploring coupled electromechanical nonlinearities for broadband energy harvesting from low-frequency rotational sources

Abstract: This paper presents a methodology to effectively harness low-frequency broadband rotational energy using coupled electromechanical non-linearities. This design integrates bi-stability and a synchronized switch harvesting on inductor (SSHI) circuit into a frequency up-converting harvester. The bistable behaviour enables improved output power due to the increased vibration amplitude under the same input plucking force. The SSHI circuit exhibits enhanced conversion capability, contributing higher electrical dampi… Show more

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Cited by 20 publications
(3 citation statements)
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“…The overall system-level efficiency will generally be substantially lower. The component-or system-level conversion efficiency and fundamental methods have been discussed in [190,191]. In summary, conversion efficiency enhancement, electronic component count reduction and power loss reduction can all be realized in a power management circuit by designing the system in a holistic manner.…”
Section: Performance Comparison and Discussionmentioning
confidence: 99%
“…The overall system-level efficiency will generally be substantially lower. The component-or system-level conversion efficiency and fundamental methods have been discussed in [190,191]. In summary, conversion efficiency enhancement, electronic component count reduction and power loss reduction can all be realized in a power management circuit by designing the system in a holistic manner.…”
Section: Performance Comparison and Discussionmentioning
confidence: 99%
“…To increase the output power and broaden the operating bandwidth of the vibration generators, various approaches, such as oscillator arrays [ 27 ], multi-modal oscillators [ 28 , 29 ], and active or passive frequency tuning technologies [ 30 ] have been proposed. In addition, researchers have exploited numerous approaches to introduce nonlinearity into vibration generators, including monostable Duffing oscillators [ 31 , 32 ], bistable oscillators [ 33 , 34 , 35 ], and frequency-up-conversion technologies [ 36 , 37 ] etc. The above mechanisms are commonly used in PEGs, EMGs, and TENGs.…”
Section: Introductionmentioning
confidence: 99%
“…However, regardless of the adopted conversion mechanism [7], most VEHs are designed based on linear oscillator with narrow working bandwidth [8]. Therefore, extensive mechanisms are proposed for broadband energy harvesting [9,10], and bi-stable nonlinearity attracts much attention due to the advantages of the large-amplitude snap-through behavior in enhancing energy output over wider frequency range [11][12][13][14].…”
Section: Introductionmentioning
confidence: 99%