Design Considerations for an Aeroelastic Micro-Power Generator

2011 ◽  
Author(s):  
Amin Bibo ◽  
Gang Li ◽  
Mohammed F. Daqaq
Keyword(s):  
Wind Speed ◽  
Output Power ◽  
Numerical Algorithms ◽  
Design Parameters ◽  
Modeling Framework ◽  
Average Wind Speed ◽  
Power Generator ◽  
Chamber Volume ◽  
Micro Power ◽  
Micro Power Generator

In two recent studies [1; 2], the authors have presented the concept and the analytical modeling framework for a scalable wind micro-power generator. The device transforms wind energy into electricity via the self-excited oscillations of a piezoelectric reed embedded within a cavity. Based on the model developed in [2], this effort utilizes the Routh-Hurwitz criterion and numerical algorithms to understand the influence of the design parameters on the device’s response with the goal of minimizing the cut-on wind speed and maximizing the output power. Results indicate that, for a beam of certain design parameters, there exists an optimal chamber volume that minimizes the cut-on wind speed of the device. This optimal volume is inversely proportional to the beam’s first modal frequency. Results also indicate that the cut-on wind speed can be decreased significantly as the aperture’s width is decreased. However, due to the reduced strain rate in the piezoelectric layer, it is observed that minimizing the cut-on wind speed does not always correspond to an increase in the output power. As such, in an attempt to study the influence of the design parameters on the output power, design charts were constructed to select the optimal design parameters for a known average wind speed. Experimental results are also presented to qualitatively verify the theoretical trends.

Micro-power-generator for energy harvesting from vortex induced vibration

2020 ◽  
Vol 64 (1-4) ◽  
pp. 573-580 ◽  
Author(s):  
Yuansheng Chen ◽  
Cong Gu ◽  
Hao Wang ◽  
Jinhao Qiu ◽  
Sunchong Zhao
Keyword(s):  
Wind Speed ◽  
Output Power ◽  
Maximum Output Power ◽  
Sensor Nodes ◽  
Structural Vibration ◽  
Maximum Output ◽  
Power Generator ◽  
Piezoelectric Energy ◽  
Micro Power ◽  
Micro Power Generator

A micro-power-generator is developed with piezoelectric ceramics, which can convert the structural vibration energy generated by wind power into electricity to provide energy for micro-devices such as wireless sensor nodes. The vibration modes of the device are analyzed. The standard interface circuit for piezoelectric energy recovery and LTC3588-1 voltage stabilization circuit are selected, and the hardware circuit of the device is designed. The output voltage and power characteristics of micro-power-generator were analyzed under different loads, frequencies and amplitudes. The experimental results show that under the same wind speed, When the blunt body is a cuboid, the power generation effect of this device is the best under the optimal load, with the maximum output power of 350.7 μW. Under the same load with the same shape and structure, the load voltage and output power increase with the increase of wind speed.

Performance analysis of a harmonica-type aeroelastic micropower generator

2012 ◽  
Vol 23 (13) ◽  
pp. 1461-1474 ◽  
Author(s):  
Amin Bibo ◽  
Gang Li ◽  
Mohammed F Daqaq
Keyword(s):  
Wind Speed ◽  
Output Power ◽  
Design Parameters ◽  
Average Wind Speed ◽  
Chamber Volume ◽  
Average Wind ◽  
Proposed Model ◽  
Basic Physics ◽  
Aperture Width ◽  
Micropower Generator

This article investigates the influence of the design parameters on the performance of an aeroelastic micropower generator with the goal of minimizing its cut-in wind speed and maximizing its output power. The generator, which mimics the basic physics of music-playing harmonicas, transforms wind energy into electricity via the self-excited oscillations of a piezoelectric reed embedded within a cavity. Previously, the authors have presented and validated an analytical aeroelectromechanical model describing the response behavior of the generator. By utilizing the proposed model, this study implements a stability analysis and numerical optimization algorithms to delineate the influence of the design parameters on the device’s response. The effect of the electric load, chamber volume, and aperture size on the cut-in wind speed is investigated. The results illustrate that the cut-in wind speed can be reduced significantly if the device is designed with an optimal chamber volume, which is shown to be inversely proportional to the square of the beam’s first modal frequency. Minimizing the aperture width is also shown to significantly reduce the cut-in speed. However, due to the reduced strain rate in the piezoelectric layer, it is observed that minimizing the wind speed does not always yield an increase in the output power. As such, a numerical investigation of the influence of the design parameters on the output power is utilized to generate design charts that assist in the selection of the optimal parameters for a known average wind speed. Several qualitative verifications of the theoretical trends are also presented through an experimental case study.

Analytical Modeling of a Micro Power Generator Based on MEMS and Piezoelectric Materials

2011 ◽  
Vol 126 (1) ◽  
pp. 106-116 ◽  
Author(s):  
R. I. Rincon-Jara ◽  
R. Ambrosio-L. ◽  
R. Torres ◽  
A. Jimenez-P.
Keyword(s):  
Analytical Modeling ◽  
Piezoelectric Materials ◽  
Power Generator ◽  
Micro Power ◽  
Micro Power Generator

A Novel Multi-Source Micro Power Generator for Harvesting Thermal and Optical Energy

2019 ◽  
Vol 40 (2) ◽  
pp. 349-352 ◽  
Author(s):  
Jiabin Yan ◽  
Xiaoping Liao ◽  
Sichao Ji ◽  
Sen Zhang
Keyword(s):  
Power Generator ◽  
Optical Energy ◽  
Micro Power ◽  
Micro Power Generator

An Integrated Combustor-Thermoelectric Micro Power Generator

2001 ◽  
pp. 34-37 ◽  
Author(s):  
Chunbo Zhang ◽  
Khalil Najafi ◽  
Luis P. Bernal ◽  
Peter D. Washabaugh
Keyword(s):  
Power Generator ◽  
Micro Power ◽  
Micro Power Generator

Design and Fabrication of a High Efficiency Piezoelectric Vibration-Induced Micro Power Generator

2003 ◽  
Author(s):  
Gou-Jen Wang ◽  
Ying-Hsu Lin ◽  
His-Harng Yang ◽  
Cheng-Tang Pan
Keyword(s):  
Theoretical Analysis ◽  
Energy Conversion ◽  
Experimental Results ◽  
Maximum Output ◽  
Vibration Source ◽  
Power Generator ◽  
Resonance Frequencies ◽  
Micro Power ◽  
Piezoelectric Vibration ◽  
Micro Power Generator

To fulfill the increasing self-power demanding of the embedded and remote microsystems, theoretical and experimental study of a piezoelectric vibration-induced micro power generator that can convert mechanical vibration energy into electrical energy is presented. A complete energy conversion model regarding the piezoelectric transducer is discussed first. To verify the theoretical analysis, two clusters of transducer structures are fabricated. The piezoelectric lead zirconate titanate (PZT) material that has better energy conversion efficiency among the piezoelectric materials is chosen to make of the energy conversion transducer. The desired shape of the piezoelectric generator with its resonance frequency in accordance with the ambient vibration source is designed by finite element analysis (FEA) approach. Conducting wires and load resistor are soldered on the electrodes to output and measure the vibration induced electrical power. Experimental results shows that the maximum output voltages are generated at the first mode resonance frequencies of the structure. It is also found from the experimental results that the induced voltage is irrelevant to the width of the structure but is inverse proportion to the length of the structure. It takes 7 minutes to charge a 10,000 μF capacitors array to a 7 V level. The total amount of electricity and energy stored in the capacitors are 0.7 Coulomb and 0.245 J, respectively. The experimental results are coincidence with the theoretical analysis.

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