scholarly journals Power Consideration in a Piezoelectric Generator

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Rémi Tardiveau ◽  
Frédéric Giraud ◽  
Adrian Amanci ◽  
Francis Dawson ◽  
Christophe Giraud-Audine ◽  
...  
Keyword(s):  
Phase Shift ◽  
Energy Harvesting ◽  
Resonant Frequency ◽  
Piezoelectric Material ◽  
Power Flow ◽  
Mechanical Energy ◽  
Power Losses ◽  
Vibration Excitation ◽  
Piezoelectric Generator ◽  
Energy Harvesting Devices

A piezoelectric generator converts mechanical energy into electricity and is used in energy harvesting devices. In this paper, synchronisation conditions in regard to the excitation vibration are studied. We show that a phase shift of ninety degrees between the vibration excitation and the bender’s displacement provides the maximum power from the mechanical excitation. However, the piezoelectric material is prone to power losses; hence the bender’s displacement amplitude is optimised in order to increase the amount of power which is converted into electricity. In the paper, we use active energy harvesting to control the power flow, and all the results are achieved at a frequency of 200 Hz which is well below the generator’s resonant frequency.

Microfluidic Synthesis of Polymer Ionic Liquid Gel Beads for Energy Harvesting Applications

2016 ◽  
Author(s):  
Kaushik A. Kudtarkar ◽  
Thomas W. Smith ◽  
Patricia Iglesias ◽  
Michael J. Schertzer
Keyword(s):  
Ionic Liquid ◽  
Energy Harvesting ◽  
Uv Light ◽  
Mechanical Energy ◽  
Electrostatic Energy ◽  
Chemical Compositions ◽  
Carrier Fluid ◽  
Energy Harvesters ◽  
Gel Beads ◽  
Energy Harvesting Devices

In the operation of many common devices and processes, more than 60% of consumed energy is wasted in many common processes. These loses come in many forms including heat, friction, and vibration. Energy harvesters are devices that can recapture some of this waste energy and convert it into electrical energy. This work will focus on electrostatic energy harvesting devices that recapture vibrational energy. Electrostatic energy harvesters recapture mechanical energy when a conductive mass translates or deforms in an electric field. Polymer ionic liquid gel beads may serve as a useful replacement for fluid droplets in electrostatic energy harvesters. This work uses a recently developed method for reliable synthesis of polymer gel beads. These beads are synthesized using a micro-reactor, which generates monomeric droplets in a silicon oil carrier fluid. The monomer solution also contains a photoinitiator and cross linker, which enables the monomer to polymerize when exposed to UV light. The present work demonstrates a method to rapidly synthesize uniform beads with a variety of chemical compositions. These chemical compositions can be used to tune the electromechanical properties of the beads to improve performance in applications such as energy harvesting devices.

scholarly journals Triboelectric Nanogenerators for Energy Harvesting in Ocean: A Review on Application and Hybridization

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5600
Author(s):  
Ali Matin Matin Nazar ◽  
King-James Idala Idala Egbe ◽  
Azam Abdollahi ◽  
Mohammad Amin Hariri-Ardebili
Keyword(s):  
Energy Harvesting ◽  
Mechanical Energy ◽  
Ocean Waves ◽  
Energy Resources ◽  
Advantages And Disadvantages ◽  
Natural Energy ◽  
Electromagnetic Generators ◽  
Triboelectric Nanogenerators ◽  
High Level ◽  
Energy Harvesting Devices

With recent advancements in technology, energy storage for gadgets and sensors has become a challenging task. Among several alternatives, the triboelectric nanogenerators (TENG) have been recognized as one of the most reliable methods to cure conventional battery innovation’s inadequacies. A TENG transfers mechanical energy from the surrounding environment into power. Natural energy resources can empower TENGs to create a clean and conveyed energy network, which can finally facilitate the development of different remote gadgets. In this review paper, TENGs targeting various environmental energy resources are systematically summarized. First, a brief introduction is given to the ocean waves’ principles, as well as the conventional energy harvesting devices. Next, different TENG systems are discussed in details. Furthermore, hybridization of TENGs with other energy innovations such as solar cells, electromagnetic generators, piezoelectric nanogenerators and magnetic intensity are investigated as an efficient technique to improve their performance. Advantages and disadvantages of different TENG structures are explored. A high level overview is provided on the connection of TENGs with structural health monitoring, artificial intelligence and the path forward.

Comparison of monolithic and composite piezoelectric material–based energy harvesting devices

2014 ◽  
Vol 25 (14) ◽  
pp. 1825-1837 ◽  
Author(s):  
Hyun J Song ◽  
Young-Tai Choi ◽  
Norman M Wereley ◽  
Ashish Purekar
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Material ◽  
Energy Harvesting Devices

Powering Pacemakers With a Nonlinear Hybrid Rotary-Translational Energy Harvester

2014 ◽  
Author(s):  
Benjamin Kuch ◽  
M. Amin Karami
Keyword(s):  
Energy Harvesting ◽  
Multiple Scales ◽  
Mechanical Energy ◽  
Sine Wave ◽  
Translational Energy ◽  
Medical Problems ◽  
Energy Harvesting System ◽  
Energy Harvesting Devices ◽  
Insight Into ◽  
Nonlinear Hybrid

An application of a nonlinear Hybrid Rotary-Translational (HRT) generator is presented. An HRT generator differs from traditional energy harvesting devices in that it has the ability to harvest multi-axis base excitation. The device consists of a pendulum-like system whose rotations are caused by the base excitations. The swinging pendulum is coupled to a direct current micro generator to generate electricity. The considered application is the energy harvesting from heartbeat induced vibrations. The motivation behind studying the effectiveness of this application comes from battery hindrance. The use of relatively large batteries to power pacemakers presents many medical problems, including increasing the size of the device to accommodate the battery causing surgery complications as well as needing periodic battery replacement. An energy harvesting device can eliminate the need for such a battery, relying instead on the power generated by the beating heart. The nonlinearity of the device allows constant power to be generated across a wider range of frequencies (heartbeats per minute). The contractions of the heart are considered to be the base excitations of the device, causing the pendulum to swing. To validate and then optimize the design of the HRT system, the behavior and the power generation of the system will be studied under different parameters: size of generator, mass and length of pendulum components as well as frequency of heart beats (beats per minute). This presents an interesting design problem whose goal is to find the best HRT parameters that would result in generating the sufficient amounts of power required by pacemakers. A method in approximating the nonlinear dynamics of the electro-mechanical energy harvesting system is also presented. By studying the analytical solutions to the nonlinear electromechanical system under a sine wave excitation, we can gain insight into the problem. The extent of this paper will only cover the analytical solution to the vertically excited pendulum. Perturbation methods, specifically the multiple scales method will be employed to study the effects of forcing amplitude and frequency on the system behavior and the energy harvesting system.

scholarly journals Mathematical and Computer Modeling of Piezoelectric Generator for Energy Harvesting Devices

2019 ◽  
pp. 1-14
Author(s):  
A. N. Soloviev ◽  
D. A. Ermakov
Keyword(s):  
Energy Storage ◽  
Energy Harvesting ◽  
Computer Modeling ◽  
Numerical Experiments ◽  
Three Dimensional ◽  
Inertial Mass ◽  
Storage Device ◽  
Energy Storage Device ◽  
Piezoelectric Generator ◽  
Energy Harvesting Devices

The paper deals with modeling a Piezoelectric Generator (PEG) that includes piezoactive elements, inertial mass, plate and rack. The PEG under consideration can be an element of the energy storage device in the capacity of the source of energy provided from vibrations of elements of structures and machines.The main objective of the paper is to gain the PEG efficiency by finding the optimal geometric parameters for finding the highest output potential.The elastic and piezoceramic media are modeled within the framework of the linear theory of electroelasticity. As a research tool, CAE package ACELAN is used in which three-dimensional and axisymmetric device models are built. The numerical experiments performed a modal and harmonic analysis that enabled us to identify the most effective operating frequencies.

scholarly journals High-k dielectric screen-printed inks for mechanical energy harvesting devices

2022 ◽  
Author(s):  
Hannah S Leese ◽  
Miroslav Tejkl ◽  
Laia Vilar ◽  
Leopold Georgi ◽  
Hin Chun Yau ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Mechanical Energy ◽  
Local Environment ◽  
Electrical Energy ◽  
High K ◽  
High K Dielectric ◽  
Energy Harvesting Devices ◽  
Screen Printed

There are a range of promising applications for devices that can convert mechanical energy from their local environment into useful electrical energy. Here, mechanical energy harvesting devices have been developed...

scholarly journals Preliminary Study of Optimum Piezoelectric Cross-Ply Composites for Energy Harvesting

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
David N. Betts ◽  
H. Alicia Kim ◽  
Christopher R. Bowen
Keyword(s):  
Energy Harvesting ◽  
Numerical Investigation ◽  
Piezoelectric Material ◽  
Electrical Energy ◽  
State Change ◽  
Power Extraction ◽  
Wide Range ◽  
Preliminary Study ◽  
Rectangular Laminate ◽  
Energy Harvesting Devices

Energy harvesting devices based on a piezoelectric material attached to asymmetric bistable laminate plates have been shown to exhibit high levels of power extraction over a wide range of frequencies. This paper optimizes for the design of bistable composites combined with piezoelectrics for energy harvesting applications. The electrical energy generated during state-change, or “snap-through,” is maximized through variation in ply thicknesses and rectangular laminate edge lengths. The design is constrained by a bistability constraint and limits on both the magnitude of deflection and the force required for the reversible actuation. Optimum solutions are obtained for differing numbers of plies and the numerical investigation results are discussed.

Comparing Linear and Essentially Nonlinear Vibration-Based Energy Harvesting

2008 ◽  
Author(s):  
D. Dane Quinn ◽  
Angela L. Triplett ◽  
Lawrence A. Bergman ◽  
Alexander F. Vakakis
Keyword(s):  
Energy Harvesting ◽  
Environmental Conditions ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Ambient Vibration ◽  
Ambient Conditions ◽  
Harvesting Systems ◽  
Linear Elements ◽  
And Performance ◽  
Energy Harvesting Devices

Self-contained long-lasting energy sources are rapidly increasing in importance as portable electronics and inaccessible devices such as wireless sensors are finding wider and more varied applications. However, in many circumstances replacing power supplies, such as conventional batteries, becomes impractical and the development of a self-renewing source of energy is paramount to the continued development of such devices. The ability to convert ambient mechanical energy to usable electrical energy fills these requirements and one aspect of current research seeks to increase the efficiency and performance of these energy harvesting systems. However, to achieve acceptable performance conventional vibration-based energy harvesting devices based on linear elements must be specifically tuned to match environmental conditions such as the frequency and amplitude of the external vibration. As the environmental conditions vary under ambient conditions the performance of these linear devices is dramatically decreased. The strategy to efficiently harvest energy from low-level, intermittent ambient vibration, proposed herein, relies on the unique properties of a particular class of strongly nonlinear vibrating systems that are referred to as “essentially” nonlinear.

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