Study on the Fabrication Process of a MEMS Bistable Energy Harvester Based on Coupled Component Structures

2018 ◽  
pp. 75-79 ◽  
Author(s):  
Masoud Derakhshani ◽  
Brian E. Allgeier ◽  
Thomas A. Berfield
Keyword(s):  
Energy Harvester ◽  
Fabrication Process ◽  
Bistable Energy Harvester

Bistable energy harvester using easy snap-through performance to increase output power

Energy ◽  
2021 ◽  
Vol 226 ◽  
pp. 120414
Author(s):  
Wu Nan ◽  
He Yuncheng ◽  
Fu Jiyang
Keyword(s):  
Output Power ◽  
Energy Harvester ◽  
Bistable Energy Harvester

scholarly journals Load Resistance Optimization of a Broadband Bistable Piezoelectric Energy Harvester for Primary Harmonic and Subharmonic Behaviors

2021 ◽  
Vol 13 (5) ◽  
pp. 2865 ◽  
Author(s):  
Sungryong Bae ◽  
Pilkee Kim
Keyword(s):  
Energy Harvester ◽  
Load Resistance ◽  
Oscillation Period ◽  
Ambient Vibration ◽  
Ambient Vibrations ◽  
Frequency Dependency ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Optimal Load ◽  
Bistable Energy Harvester

In this study, optimization of the external load resistance of a piezoelectric bistable energy harvester was performed for primary harmonic (period-1T) and subharmonic (period-3T) interwell motions. The analytical expression of the optimal load resistance was derived, based on the spectral analyses of the interwell motions, and evaluated. The analytical results are in excellent agreement with the numerical ones. A parametric study shows that the optimal load resistance depended on the forcing frequency, but not the intensity of the ambient vibration. Additionally, it was found that the optimal resistance for the period-3T interwell motion tended to be approximately three times larger than that for the period-1T interwell motion, which means that the optimal resistance was directly affected by the oscillation frequency (or oscillation period) of the motion rather than the forcing frequency. For broadband energy harvesting applications, the subharmonic interwell motion is also useful, in addition to the primary harmonic interwell motion. In designing such piezoelectric bistable energy harvesters, the frequency dependency of the optimal load resistance should be considered properly depending on ambient vibrations.

Piezoelectric materials for bistable energy harvester: A comparative study

2016 ◽  
Vol 176 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Vishrut Shah ◽  
Rajeev Kumar ◽  
Mohammad Talha ◽  
Rahul Vaish
Keyword(s):  
Comparative Study ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Bistable Energy Harvester

scholarly journals Design and Fabrication of Energy Harvester using VIVACE (Vortex Induced Vibrations Aquatic Clean Energy)

2019 ◽  
Vol 8 (2S3) ◽  
pp. 1023-1027
Keyword(s):  
Developing Countries ◽  
Population Growth ◽  
Energy Harvester ◽  
Clean Energy ◽  
Fabrication Process ◽  
Energy Crisis ◽  
Environmental Concerns ◽  
Cfd Simulations ◽  
Vortex Induced Vibrations ◽  
Global Demand

Massive industrialization and population growth have led to a surge in the global demand for energy in recent years. Electricity is the new currency and developing countries are in desperate need of insatiable units of electricity. There is so much potential in Hydropower which when harnessed efficiently can show a phenomenal way in addressing the energy crisis. The conventional methods of harnessing the hydropower like generating electricity by damming, etc. have many limitations concerning environmental concerns, aquatic ecological imbalance and other issues. The paper is on Vortex Induced Vibrations Aquatic Clean Energy (VIVACE). It focuses on Clean Energy, making use of Vortex Induced Vibrations (VIV) to generate electricity. This paper describes the design and fabrication process related to energy harvester to harness VIVACE. CFD simulations done to obtain the feasible values of some important parameters involved in VIVACE are also discussed

Impulsively-Excited Bistable Energy Harvester Combined With Electromagnetic Mechanism

2018 ◽  
Author(s):  
Shitong Fang ◽  
Wei-Hsin Liao
Keyword(s):  
Energy Harvester ◽  
Damping Ratio ◽  
High Amplitude ◽  
High Energy ◽  
Living Environment ◽  
Energy Output ◽  
Energy Harvesters ◽  
Hybrid Configuration ◽  
Promising Source ◽  
Bistable Energy Harvester

Impulsive energy provides a promising source for energy harvesting techniques due to their high amplitude and abundance in a living environment. The sensitivity to excitation of bistable energy harvesters makes them feasible for impulsive-type events. In this paper, a novel impulsively-excited bistable energy harvester with rotary structure and plectrum is proposed to achieve plucking-based frequency up-conversion. The input excitation is converted to plucking force on the bistable energy harvester, so as to help it go into the high-energy orbit. The piezoelectric and electromagnetic transduction mechanisms are combined by incorporating a coil to the structure in order to overcome the increase of damping introduced by the bistable configuration. As a result, high-energy output and broadband performance could be realized. Impact mechanics is employed to develop a comprehensive model, which could be used to analyze the nonlinear dynamics and predict the system responses under various plucking velocities and overlap lengths. Numerical simulation shows that the bistable energy harvester could experience large-amplitude oscillation under impulsive excitation and the hybrid configuration outperforms the standalone ones under high damping ratio and low coupling coefficient. The proposed design is targeted to be applied on the turnstile gates of the subway station. Less human effort would be needed when passengers pass the turnstile gate due to the snap-through motion of bistability.

Nonlinear characterization and performance optimization for broadband bistable energy harvester

2020 ◽  
Vol 36 (3) ◽  
pp. 578-591 ◽  
Author(s):  
Ting Tan ◽  
Zhimiao Yan ◽  
Kejing Ma ◽  
Fengrui Liu ◽  
Linchuan Zhao ◽  
...  
Keyword(s):  
Performance Optimization ◽  
Energy Harvester ◽  
Nonlinear Characterization ◽  
And Performance ◽  
Bistable Energy Harvester

Optimal Impedance Load of a Bistable Energy Harvester

PAMM ◽  
2015 ◽  
Vol 15 (1) ◽  
pp. 249-250
Author(s):  
Matthias Heymanns ◽  
Peter Hagedorn
Keyword(s):  
Energy Harvester ◽  
Bistable Energy Harvester
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