A miniature generator using piezoelectric bender with elastic base

Li, W.; Liu, T.S.; Hsiao, Chin-Chai

doi:10.1016/j.mechatronics.2011.07.004

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…Wang et al (2012) presented a type of vibration energy harvester combining a piezoelectric cantilever and a single degree of freedom elastic system to improve the harvester output performances. Li et al (2011) studied a miniature generator using piezoelectric bender with elastic base; Aldraihem and Baz (2011) researched a dynamic magnifier consisting of a spring-mass system that is placed between a piezoelectric element and the moving base, and Arafa et al (2011) experimentally studied a cantilevered piezoelectric energy harvester with a dynamic magnifier. There have been numerous papers that have researched the effects of an EM with a BPH although lacking the bistable interaction.…”

Section: Introductionmentioning

confidence: 99%

A bistable piezoelectric oscillator with an elastic magnifier for energy harvesting enhancement

Wang

Liao

2016

Journal of Intelligent Material Systems and Structures

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Bistable oscillator has been recognized as an effective means by which to improve the linear resonant energy harvesting performance for its unique double-well restoring force potential. As oscillating in a high-energy orbit, the oscillator should be located at a distance from one stable to the other with a much higher velocity or acceleration. However, the vibration level in environment would be too low to provide the oscillator with a larger velocity to overcome the potential well barrier. This article is focused on the enhancement of a bistable piezoelectric oscillator with an elastic magnifier for high-energy orbit harvesting. The elastic magnifier positioned between the bistable piezoelectric oscillator and the base is to amplify the base vibration level in order to provide the bistable piezoelectric harvester with large movement. A 2-degree-of-freedom nonlinear lumped-parameter model of the bistable piezoelectric harvester with an elastic magnifier (bistable piezoelectric harvester + elastic magnifier) is derived to exhibit the large-amplitude periodic oscillation behaviors. With the comparison of the electromechanical responses obtained from theory and experiment, the results show that the output displacement, tip velocity, and harvesting voltage under open-circuit condition of the bistable piezoelectric harvester + elastic magnifier configuration are 15 mm, 1500 mm s−1, and 13 V, respectively, while those of the only bistable piezoelectric harvester configuration are 1 mm, 120 mm s−1, and 2 V under the excitation level of 8.69 m s−2 and frequency of 16 Hz. It is verified that the bistable piezoelectric harvester with an elastic magnifier can generate larger output performance than that of the bistable piezoelectric harvester without elastic magnifier at several excitation frequencies and levels.

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Section: Introductionmentioning

confidence: 99%

A bistable piezoelectric oscillator with an elastic magnifier for energy harvesting enhancement

Wang

Liao

2016

Journal of Intelligent Material Systems and Structures

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“…Unlike previous studies [23][24][25][26][27], the improved model takes into account the important information on the dynamic mode shape and strain distribution of the CPEH. This important information is involved in the key parameters of equivalent mass eq and stiffness eq of the CPEH.…”

Section: Definitions Of Improved Model Parametersmentioning

confidence: 99%

“…However, the developed mathematical model does not take into account in detail the electromechanical coupling between the mechanical and electrical fields and does not consider the effect of the design parameters of the dynamic magnifier or the external resistance on the output power of the energy harvester. Li et al [24] investigated a miniature electric generator consisting of piezoelectric benders and elastic magnifier and derived the lumped parameter analytical model. The developed model, however, ignores the effect of the dynamic mode shape and the strain distribution of the CPEH and the electrical loads on the output power.…”

Section: Introductionmentioning

confidence: 99%

Experiments and Electromechanical Properties of a Broadband Piezoelectric Vibration Energy Harvester

Wang

Gao

2016

Shock and Vibration

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A broadband piezoelectric energy harvester (BPEH), consisting of a conventional linear piezoelectric energy harvester (CPEH) and an elastic magnifier, was presented in this paper. The improved two-degree-of-freedom lumped-parameter electromechanical model of the BPEH was established and the optimal external resistances under short-circuit and open-circuit resonance conditions were investigated to maximize the output power of the BPEH. The output voltage and output power of the BPEH obtained from the theoretical model were verified and found to be in reasonable agreement with the experimental results. The obtained results have shown that the maximal output powers under short-circuit and open-circuit resonance conditions are both 24 times that generated by the CPEH without elastic magnifier. The frequency space between the two peaks of the frequency-response curve of the BPEH is 14 Hz which is 7 times that of CPEH.

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“…But the energy-conversion capability of the conventional piezoelectric energy harvesters is still too low to be used widely, especially for low-level and low-frequency vibration. Methods to enhance energy generation and lower optimal frequency of a piezoelectric energy harvester are key technologies in the future [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A Magnet-Coupled Piezoelectric Vibration Energy Harvester

Kan

Wen

Zhou

et al. 2013

AMM

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To improve energy harvesting performance, a magnet-coupled piezoelectric vibration energy harvester (MCPEH) for low-level and low-frequency vibration was presented and investigated experimentally. The MCPEH consisted mainly of a piezo-cantilever with a permanent magnet at its free-end and another excitation magnet fixed on vibration structure. The magnets are used to produce magnetic attractive force to enhance energy generation. A MCPEH was fabricated with a piezo-cantilever measured 60x10x0.5mm3 and two magnets sized ø12x3mm3. The testing results show that the magnetic force, denoted by the initial separated distance between the magnetic dipoles (SDMD), exerts great influence on all of the generated voltage, optimal frequency, and effective bandwidth. With the SDMD reducing from 40mm to 15mm, the optimal frequency decrease from 32.75Hz to 30.5Hz, the effective bandwidth for the MCPEH to generated voltage of 15V rises from 2.5Hz to 7.5Hz, and the generated voltage rises from 30.4V to 44.4V.

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A miniature generator using piezoelectric bender with elastic base

Cited by 7 publications

References 11 publications

A bistable piezoelectric oscillator with an elastic magnifier for energy harvesting enhancement

A bistable piezoelectric oscillator with an elastic magnifier for energy harvesting enhancement

Experiments and Electromechanical Properties of a Broadband Piezoelectric Vibration Energy Harvester

A Magnet-Coupled Piezoelectric Vibration Energy Harvester

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