Finite Element Analysis of Energy Harvesting With Cymbal Transducer
LU Yigang YAN Zhenfang
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School of Physics, South China University of Technology, Guangzhou 510640, China
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History+
Received
Revised
Published
2011-11-28
2012-03-13
2013-03-25
Issue Date
2013-03-25
Abstract
A finite element analysis model of energy harvesting with Cymbal transducer is established. The influence of structural parameters of the transducer on the output voltage and resonance frequency is calculated and analyzed. The results show that, in order to reduce the operating frequency and increase the output voltage of the transducer, we should increase the bottom diameter of the cavity and reduce the height of the cavity. When choosing the thickness of metal end cap and the thickness of PZT, the stiffness of Cymbal transducer and the characteristics of frequency and acceleration of an external vibration source must take into consideration. A pre-stress, multi-layer structure of Cymbal energy harvesting system are promoted and analyzed. The effect of the external resistance load on the output voltage and the output power of Cymbal transducer is identified. The results shows that, at a specific frequency there always has an optimal external resistance load which makes the transducer generate the maximum output power. The optimal resistance of the load matches with the output impedance of Cymbal transducer at this specific frequency.
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