Modeling and comparison of cantilevered piezoelectric energy harvester with segmented and continuous electrode configurations
Date of Issue2013
Active and Passive Smart Structures and Integrated Systems (2013 : San Diego, California, USA)
School of Civil and Environmental Engineering
Continuous electrode configuration (CEC) has been widely used in piezoelectric energy harvesters (PEHs). A PEH with CEC works around the first resonance efficiently but it suffers from low efficiency due to cancellation effect around higher modes. The use of segmented electrode configuration (SEC) can avoid the cancellation effect around higher modes. To achieve this, the output from each electrode pair on the opposite sides of the strain node needs to be rectified separately. In such a case, the theoretical formulation for power estimation becomes challenging because of some nonlinear electrical components included. In this paper, a method based on combining the equivalent circuit model (ECM) and the circuit simulation is proposed to estimate the power outputs of the cantilevered PEH with the SEC. First, the parameters in the ECM considering multiple modes of the PEH with the SEC are identified from the finite element analysis. The ECM is then established and simulated in the SPICE software. The optimal power outputs from the PEH with the SEC are compared with those from the PEH with the CEC. The results illustrate the advantage of the SEC to enhance the power outputs of a PEH at higher resonance frequencies.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). This paper was published in Proceeding of SPIE, Active and Passive Smart Structures and Integrated Systems 2013 and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at the following official DOI: [http://dx.doi.org/10.1117/12.2013816]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.