Performance analysis of piezoelectric bimorph generator |
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Authors: | Junwu Kan Kehong Tang Hongwei Zhao Chenghui Shao and Guoren Zhu |
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Affiliation: | (1) College of Mechanical Science and Engineering, Jilin University, Changchun, 130025, China |
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Abstract: | In this paper, the theoretical model and simulation of the performance of a piezoelectric (PZT) bimorph generator is introduced.
The generator consists of two piezoelectric plates bonded on a substrate metal plate. For an effective electromechanical coupling
coefficient (EECC) and the generated energy, the analytical formulae are established with the thickness ratio and the Young’s
modulus ratio as variables. After giving correlative material parameters, the EECC and generated energy can be computed. The
results show that there is a optimal thickness ratio for a piezoelectric bimorph generator to achieve the maximum EECC and
electrical energy. The EECC and generated energy decrease with an increase of the Young’s modulus ratio. In addition, the
influence of mechanical source on electrical energy generation and power output is also considered. |
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Keywords: | piezoelectric generator energy harvesting effective electromechanical coupling efficient |
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