Details
| Original language | English |
|---|---|
| Title of host publication | Smart Structures and Materials 2006 |
| Subtitle of host publication | Damping and Isolation |
| Publication status | Published - 17 Mar 2006 |
| Externally published | Yes |
| Event | SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring - San Diego, United States Duration: 26 Feb 2006 → 2 Mar 2006 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 6169 |
| ISSN (Print) | 0277-786X |
Abstract
In the design process of energy harvesting systems based on piezoelectric elements, achievable energy output is the most interesting factor. To estimate this amount a priori manufacturing of prototypes a mathematical model is very helpful. Within this contribution we will introduce a model based on electro-mechanical circuit theory. Its parameters are identified by measurements and the model is validated by comparison to experimental results. The model is designed to support the development-engineer in the dimensioning of energy harvesting units to specific application demands. Two main challenges in device design are investigated with the mathematical model: influence of the ambient excitation frequency, and influence of the load impedance. Typically, the equivalent model approach delivers models for piezoelectric elements that are driven in resonance by electrical excitation. In the case of energy harvesting the piezoelectric elements are excited mechanically and most often non-resonant. Thus, we first set up a mechanical equivalent model for base excited systems. In first approximation it represents an energy harvesting unit around one resonance frequency. The model is expandable for a wider frequency range using the superpositioning of multiple circuits. From the viewpoint of optimum energy transformation between mechanical and electrical energy it is favorable to drive piezoelectric elements at resonance or anti-resonance. Thus, an energy harvesting system should be tuned to the excitation frequency.
Keywords
- Autonomous Systems, Energy Harvesting, Energy Supply, Piezoelectric Elements
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
Smart Structures and Materials 2006: Damping and Isolation. 2006. 616909 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6169).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Model based design of Piezoelectric Energy Harvesting Systems
AU - Twiefel, Jens
AU - Richter, Björn
AU - Hemsel, Tobias
AU - Wallaschek, Jörg
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/3/17
Y1 - 2006/3/17
N2 - In the design process of energy harvesting systems based on piezoelectric elements, achievable energy output is the most interesting factor. To estimate this amount a priori manufacturing of prototypes a mathematical model is very helpful. Within this contribution we will introduce a model based on electro-mechanical circuit theory. Its parameters are identified by measurements and the model is validated by comparison to experimental results. The model is designed to support the development-engineer in the dimensioning of energy harvesting units to specific application demands. Two main challenges in device design are investigated with the mathematical model: influence of the ambient excitation frequency, and influence of the load impedance. Typically, the equivalent model approach delivers models for piezoelectric elements that are driven in resonance by electrical excitation. In the case of energy harvesting the piezoelectric elements are excited mechanically and most often non-resonant. Thus, we first set up a mechanical equivalent model for base excited systems. In first approximation it represents an energy harvesting unit around one resonance frequency. The model is expandable for a wider frequency range using the superpositioning of multiple circuits. From the viewpoint of optimum energy transformation between mechanical and electrical energy it is favorable to drive piezoelectric elements at resonance or anti-resonance. Thus, an energy harvesting system should be tuned to the excitation frequency.
AB - In the design process of energy harvesting systems based on piezoelectric elements, achievable energy output is the most interesting factor. To estimate this amount a priori manufacturing of prototypes a mathematical model is very helpful. Within this contribution we will introduce a model based on electro-mechanical circuit theory. Its parameters are identified by measurements and the model is validated by comparison to experimental results. The model is designed to support the development-engineer in the dimensioning of energy harvesting units to specific application demands. Two main challenges in device design are investigated with the mathematical model: influence of the ambient excitation frequency, and influence of the load impedance. Typically, the equivalent model approach delivers models for piezoelectric elements that are driven in resonance by electrical excitation. In the case of energy harvesting the piezoelectric elements are excited mechanically and most often non-resonant. Thus, we first set up a mechanical equivalent model for base excited systems. In first approximation it represents an energy harvesting unit around one resonance frequency. The model is expandable for a wider frequency range using the superpositioning of multiple circuits. From the viewpoint of optimum energy transformation between mechanical and electrical energy it is favorable to drive piezoelectric elements at resonance or anti-resonance. Thus, an energy harvesting system should be tuned to the excitation frequency.
KW - Autonomous Systems
KW - Energy Harvesting
KW - Energy Supply
KW - Piezoelectric Elements
UR - http://www.scopus.com/inward/record.url?scp=33745861328&partnerID=8YFLogxK
U2 - 10.1117/12.658623
DO - 10.1117/12.658623
M3 - Conference contribution
AN - SCOPUS:33745861328
SN - 0819462225
SN - 9780819462220
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Smart Structures and Materials 2006
T2 - SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring
Y2 - 26 February 2006 through 2 March 2006
ER -