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.

scholarly journals A Micro-Power Generator Based on Two Piezoelectric MFC Films

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 861
Author(s):  
Yongxin Ma ◽  
Jia Wang ◽  
Chong Li ◽  
Xiaorui Fu
Keyword(s):  
Output Voltage ◽  
Fiber Composite ◽  
Maximum Output Power ◽  
High Energy ◽  
High Energy Density ◽  
Maximum Output ◽  
Power Generator ◽  
Piezoelectric Generator ◽  
Micro Power ◽  
Micro Power Generator

In order to realize the collection of micro or small vibration energy, a micro-power generator based on two piezoelectric Macro Fiber Composite (MFC) films is proposed. The piezoelectric generator consists of a double piezoelectric MFCs type vibrator and a displacement amplifying mechanism, which can achieve the output of high energy density. The design process of this kind of piezoelectric generator is presented. Based on LabVIEW platform and NI Data Acquisition (DAQ) card, the output voltage acquisition system of the generator is built, and the output voltage and power are collected and calculated. Experimental results show that the maximum output power is 6.2 mW under transient excitation. Under continuous excitation with a load resistance of 10 kΩ and an excitation frequency of 26 Hz, the maximum output of the generator is up to 11.9 mW. The research results lay a foundation for the application of the proposed micro-power piezoelectric generator.

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.

Study of Cantilever Structures Based on Piezoelectric Materials for Energy Harvesting at Low Frequency of Vibration

2014 ◽  
Vol 976 ◽  
pp. 159-163 ◽  
Author(s):  
Roberto Ambrosio ◽  
Hector Gonzalez ◽  
Mario Moreno ◽  
Alfonso Torres ◽  
Rafael Martinez ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Output Power ◽  
Lead Zirconate Titanate ◽  
Maximum Output Power ◽  
Low Frequency ◽  
Electrical Contacts ◽  
Piezoelectric Energy Harvesting ◽  
Maximum Output ◽  
Coupling Coefficients ◽  
Piezoelectric Energy

In this work is presented a study of a piezoelectric energy harvesting device used for low power consumption applications operating at relative low frequency. The structure consists of a cantilever beam made by Lead Zirconate Titanate (PZT) layer with two gold electrodes for electrical contacts. The piezoelectric material was selected taking into account its high coupling coefficients. Different structures were analyzed with variations in its dimensions and shape of the cantilever. The devices were designed to operate at the resonance frequency to get maximum electrical power output. The structures were simulated using finite element (FE) software. The analysis of the harvesting devices was performed in order to investigate the influence of the geometric parameters on the output power and the natural frequency. To validate the simulation results, an experiment with a PZT cantilever with brass substrate was carried out. The experimental data was found to be very close to simulation data. The results indicate that large structures, in the order of millimeters, are the ideal for piezoelectric energy harvesting devices providing a maximum output power in the range of mW

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.

Analytic Modeling and Experimental Verification of Thin-Film Piezoelectric Vibration-Induced Micro Power Generator

2004 ◽  
Author(s):  
Shi-Lun Chen ◽  
Gou-Jen Wang ◽  
Wen-Chin Yu
Keyword(s):  
Mechanical Strain ◽  
Electrical Power ◽  
Excitation Frequency ◽  
Damping Factor ◽  
Maximum Output ◽  
Analytic Model ◽  
Induced Voltage ◽  
Power Generator ◽  
Micro Power ◽  
Micro Power Generator

In this article, a novel electromechanical energy conversion model of a piezoelectric cantilever bimorphs micro transducer is proposed. In this new piezoelectric-base power generator modeling, the coupling relationship between the mechanical strain and the piezoelectric polarization, rather than the curvature basis approach, is adopted to deduce the vibration-induced voltage and electrical power. In addition to the working equation for piezoelectric sensors, the damping effect is included to enable the resonance frequency, the maximum induced voltage at the resonance, the conversion power, and the dimensions of the piezoelectric micro power generator to be analytic estimated. The analytic model shows that the vibration-induced voltage is proportional to the excitation frequency and the width of the device but is inverse proportional to the length of cantilever beam and the damping factor. To verify the theoretical analysis, two clusters of micro transducers are fabricated. Experimental results demonstrate that the maximum output voltages and the power conversion are only little derivations from the analytic model.

scholarly journals Bidirectional Piezoelectric Energy Harvester

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3845 ◽  
Author(s):  
Andrius Čeponis ◽  
Dalius Mažeika ◽  
Artūras Kilikevičius
Keyword(s):  
Output Power ◽  
Energy Harvester ◽  
Maximum Output Power ◽  
Geometrical Parameters ◽  
Maximum Output ◽  
Electrical Characteristics ◽  
Harmonic Vibrations ◽  
Piezoelectric Energy ◽  
Out Of Plane ◽  
Bending Modes

This paper represents a numerical and experimental investigation of the bidirectional piezoelectric energy harvester. The harvester can harvest energy from the vibrating base in two perpendicular directions. The introduced harvester consists of two cantilevers that are connected by a particular angle and two seismic masses. The first mass is placed at a free end of the harvester while the second mass is fixed at the joining point of the cantilevers. The piezoelectric energy harvester employs the first and the second out of plane bending modes. The numerical investigation was carried out to obtain optimal geometrical parameters and to calculate the mechanical and electrical characteristics of the harvester. The energy harvester can provide stable output power during harmonic and impact-based excitation in two directions. The results of the investigations showed that energy harvester provides a maximum output power of 16.85 µW and 15.9 4 µW when the base has harmonic vibrations in y and z directions, respectively. Maximum output of 4.059 nW/N and 3.1 nW/N in y and z directions were obtained in case of impact based excitation

Effect of Wind Speed and Blade Deflection Angle on the Output Power of Horizontal-Axis Wind Turbines

2018 ◽  
Vol 6 (2) ◽  
pp. 75-81
Author(s):  
Muhammad Al Badri
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Turbine ◽  
Output Power ◽  
Deflection Angle ◽  
Maximum Output Power ◽  
Simulation Software ◽  
Horizontal Axis ◽  
Maximum Output ◽  
Horizontal Axis Wind Turbine

This study is aimed to optimize the conversion of kinetic wind energy into electrical energy. Wind energy is a sustainable energy that is preferred to generate electricity for its low generation cost and low CO2 emissions. The considerations of physical principles of a horizontal axis wind turbine were involved in the study. Controlling of the blade angle deviation and the turbine rotation direction was also considered. For this purpose, a complete wind turbine system was setup by using the computerized simulation software (PSCAD). The system was running at five different cases with different wind speeds and different angles of the blade. The system was successfully generating a maximum output power from the wind turbine based on the changing of the deflection angle of the blade. Also the system would shut down if there were no matching between the wind speed and its direction with the angle of the blade.

Complex Impedance Matching for Power Improvement of a Circular Piezoelectric Energy Harvester

2011 ◽  
Vol 148-149 ◽  
pp. 169-172 ◽  
Author(s):  
Hong Yan Wang ◽  
Xiao Biao Shan ◽  
Tao Xie
Keyword(s):  
Output Power ◽  
Power Output ◽  
Energy Harvester ◽  
Impedance Matching ◽  
Maximum Output Power ◽  
Complex Impedance ◽  
Complex Conjugate ◽  
Maximum Output ◽  
Piezoelectric Energy ◽  
Matching Load

The impedance matching and the optimization of power from a circular piezoelectric energy harvester with a central-attached mass are studied. A finite element model is constructed to analyze the electrical equivalent impedance of the circular piezoelectric energy harvester. Furthermore, the complex conjugate matching load is used to extract the maximum output power of the energy harvester. The power output from complex conjugate matching load is compared with the power output from the resistive matching load and a constant resistance, separately. The results suggest that the complex conjugate matching can result in a significant increase of the output power for all frequencies. The effective bandwidth of the piezoelectric energy harvester is extended significantly.

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