Efficiency of energy conversion for devices containing a piezoelectric component
Recent developments in miniaturized sensors, digital processors and wireless communication systems have many desirable applications. The realization of these applications however, is limited by the lack of a similarly sized power source. Micro-scale concepts to generate electrical power include devi...
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| Veröffentlicht in: | Journal of micromechanics and microengineering 2004-05, Vol.14 (5), p.717-721 |
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| container_end_page | 721 |
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| container_issue | 5 |
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| container_title | Journal of micromechanics and microengineering |
| container_volume | 14 |
| creator | Richards, Cecilia D Anderson, Michael J Bahr, David F Richards, Robert F |
| description | Recent developments in miniaturized sensors, digital processors and wireless communication systems have many desirable applications. The realization of these applications however, is limited by the lack of a similarly sized power source. Micro-scale concepts to generate electrical power include devices which use the stored energy in fuels to those which harvest energy from the environment. Many proposed power generation systems employ a piezoelectric component to convert the mechanical energy to electrical energy. Of primary importance is the efficiency of power conversion. In this paper, an exact formula is developed that predicts the power conversion efficiency for a device that contains a piezoelectric component. This formula transparently and quantitatively reveals a trade-off effect on efficiency caused by the quality factor and electromechanical coupling factor of the device. In particular, decreasing the structural stiffness leads to the largest gains in efficiency, followed by decreasing the mechanical damping and increasing the effective mass. |
| doi_str_mv | 10.1088/0960-1317/14/5/009 |
| format | Article |
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The realization of these applications however, is limited by the lack of a similarly sized power source. Micro-scale concepts to generate electrical power include devices which use the stored energy in fuels to those which harvest energy from the environment. Many proposed power generation systems employ a piezoelectric component to convert the mechanical energy to electrical energy. Of primary importance is the efficiency of power conversion. In this paper, an exact formula is developed that predicts the power conversion efficiency for a device that contains a piezoelectric component. This formula transparently and quantitatively reveals a trade-off effect on efficiency caused by the quality factor and electromechanical coupling factor of the device. 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In particular, decreasing the structural stiffness leads to the largest gains in efficiency, followed by decreasing the mechanical damping and increasing the effective mass.</description><subject>Applied sciences</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Instruments, apparatus, components and techniques common to several branches of physics and astronomy</subject><subject>Mechanical engineering. Machine design</subject><subject>Mechanical instruments, equipment and techniques</subject><subject>Microelectronic fabrication (materials and surfaces technology)</subject><subject>Micromechanical devices and systems</subject><subject>Physics</subject><subject>Precision engineering, watch making</subject><subject>Semiconductor electronics. Microelectronics. Optoelectronics. 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| ispartof | Journal of micromechanics and microengineering, 2004-05, Vol.14 (5), p.717-721 |
| issn | 0960-1317 1361-6439 |
| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Applied sciences Electronics Exact sciences and technology Instruments, apparatus, components and techniques common to several branches of physics and astronomy Mechanical engineering. Machine design Mechanical instruments, equipment and techniques Microelectronic fabrication (materials and surfaces technology) Micromechanical devices and systems Physics Precision engineering, watch making Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices |
| title | Efficiency of energy conversion for devices containing a piezoelectric component |
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