Wideband excitation of an electrostatic vibration energy harvester with power-extracting end-stops

Le, Cuong Phu; Halvorsen, Einar; Sorasen, O.; Yeatman, Eric M.

doi:10.1088/0964-1726/22/7/075020

Cited by 29 publications

(30 citation statements)

References 34 publications

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“…The errors such as 2Hz frequency shift and 5V output voltage offset, could be attributed to the support conditions of the cantilevered harvester and the measuring system loss. 14,33 Fig . 5(b) shows the open circuit voltage and output power measured from the energy harvester with diverse resistive loads at resonant frequency.…”

Section: B Results and Discussionmentioning

confidence: 99%

“…Among of which, piezoelectric mechanical vibration energy harvesters have attracted the most attentions, in view of the advantages of high electromechanical coupling and no requirement for external voltage source. [12][13][14][15][16][17] The ambient vibration (e.g. vibration of civil engineering structure and heavy machinery) is always stochastic, intermittent, and mainly distributes in the low frequency (<100Hz), 18,19 which usually appear as broad peaks rather than sharp ones when reflected in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Liu

Wang

et al. 2015

AIP Advances

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A utility piezoelectric energy harvester with low frequency and high-output voltage: Theoretical model, experimental verification and energy storage AIP Advances 6, 095208 (2016) As an alternative to traditional cantilever beam structures and their evolutions, a flexible beam based, interdigital structure, vibration energy harvester has been presented and investigated. The proposed interdigital-shaped oscillator consists of a rectangular flexible frame and series of cantilever beams interdigitally bonded to it. In order to achieve low frequency and wide-bandwidth harvesting, Young's modulus of materials, frame size and the amount of the cantilevers have been studied systematically. The measured frequency responses of the designed device (PDMS frame, quintuple piezoelectric cantilever beams) show a 460% increase in bandwidth below 80Hz. When excited at an acceleration of 1.0 g, the energy harvester achieves to a maximum open-circuit voltage of 65V, and the maximum output power 4.5 mW. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

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Section: B Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Liu

Wang

et al. 2015

AIP Advances

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“…The conversion effi ciency of the 3D-TENG under out-of-plane excitation is higher than that of the electrostatic harvester. [ 34 ] Furthermore, the 3D-TENG is capable of harvesting vibrational energy from different directions, while the electrostatic harvester can only work under the circumstance of single-direction vibration. The 135°, and 150°, respectively.…”

Section: Resultsmentioning

confidence: 99%

Broadband Vibrational Energy Harvesting Based on a Triboelectric Nanogenerator

Yang

Chen

Yang

et al. 2013

Advanced Energy Materials

319

185

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. IntroductionOver the past decades, harvesting ambient environmental energy has attracted increasing interest for realizing self-powered systems and for meeting large-scale energy demands. Searching for clean and renewable energy with reduced carbon emissions is urgent to the sustainable development of human civilization. [ 1 ] To date, various energy harvesters for scavenging ambient environmental vibrational energy have been developed that rely on piezoelectric, [2][3][4][5][6] electromagnetic, [ 7,8 ] and electrostatic [ 9,10 ] transduction mechanisms. Considerable research effort has been devoted to improve the effi ciency of vibrational energy harvesters. [11][12][13][14][15][16][17][18] However, regardless of the transduction mechanisms and novel structures, the vibration-to-electric conversion effi ciency is still quite low in the existing harvesters because: 1) most of them are designed as linear resonant structures in order to achieve maximum power generation, which limits their application in realworld environments with stochastic or varying vibration spectra; [ 14 ] and 2) most devices can only effectively harvest vibrational energy from a single motion direction and/or within a small bandwidth. In this case, the harvesters are not effective at scavenging energy from a vibration with multiple or time-variant motion directions. [ 11,12,14 ] Recently, the innovative triboelectric nanogenerator (TENG) has offered a costeffective, simple, and robust approach to convert mechanical energy into electricity based on the coupling between triboelectrifi cation and electrostatic induction. [19][20][21][22][23][24][25][26][27] The triboelectrically charged planes of TENGs change the electric polarization and fi eld across two electrodes by either periodic vertical contact separation [19][20][21] or in-plane sliding, [ 22,23 ] leading to an alternating fl ow of electrons through the external load. The developed TENGs have been successfully applied as sustainable power sources for portable electronics, [ 21 ] magnetic sensors, [ 24 ] environmental monitors, [ 25 ] and other self-powered systems. [ 26,27 ] Here, we demonstrated a newly designed 3D-TENG that is able to scavenge vibrational energy in the out-of-plane direction and arbitrary in-plane directions with considerable wide bandwidth. It works in a hybridized mode of both vertical contact separation and in-plane sliding. Under out-of-plane motion excitation, the 3D-TENG produces an open-circuit voltage up to 123 V, a peak short-circuit current density of 30 mA m −2 , and a peak power density of 1.35 W m −2 . The corresponding electrical outputs are 143 V, 32 mA m −2 , and 1.45 W m −2 , respectively, when the 3D-TENG works under in-plane motion excitation. The remarkable performance enables the 3D-TENG to have tremendous practical applications including harvesting windor rain-droplet-induced vibrational energy from the national grid transmission lines, natural vibration energy from human walking, and rotation energy from vehicles with wheels.

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“…Electrostatic harvesters [12,35,[61][62][63][64][65][66] are made of a variable capacitor whose plates are electrically isolated from each other by air, vacuum, or an insulator, Figure 10. The external mechanical vibrations cause the gap between the plates to vary, changing the capacitance.…”

Section: Electrostatic Transductionmentioning

confidence: 99%

Energy Harvesting Technologies and Equivalent Electronic Structural Models—Review

et al. 2019

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As worldwide awareness about global climate change spreads, green electronics are becoming increasingly popular as an alternative to diminish pollution. Thus, nowadays energy efficiency is a paramount characteristic in electronics systems to obtain such a goal. Harvesting wasted energy from human activities and world physical phenomena is an alternative to deal with the aforementioned problem. Energy harvesters constitute a feasible solution to harvesting part of the energy being spared. The present research work provides the tools for characterizing, designing and implementing such devices in electronic systems through their equivalent structural models.

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Wideband excitation of an electrostatic vibration energy harvester with power-extracting end-stops

Cited by 29 publications

References 34 publications

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Broadband Vibrational Energy Harvesting Based on a Triboelectric Nanogenerator

Energy Harvesting Technologies and Equivalent Electronic Structural Models—Review

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