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Vol. 105, Issue 6, June 2009, pp.81-93





Modeling and Analysis of a Bimorph PZT Cantilever Beam Based Micropower Generator


1Jyoti AJITSARIA, 1Song-Yul CHOE, 2Phil OZMUN, 3Dongna SHEN
 and 3Dong-Joo KIM

1Department of Mechanical Engineering, Auburn University, Auburn, Alabama, 36849, USA

2Department of Electrical Engineering, Auburn University, Auburn, Alabama, 36849, USA

3Materials Research and Education Center, Auburn University, Auburn, Alabama, 36849, USA

E-mail: ajitsjk@auburn.edu



Received: 7 May 2009   /Accepted: 22 June 2009   /Published: 30 June 2009


Abstract: 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. One method of power harvesting is the use of piezoelectric materials (PZT), which form transducers that are able to interchange electrical energy and mechanical vibration. Many proposed power generation systems employ a piezoelectric component to convert the mechanical energy to electrical energy. In this paper, a formulation of mathematical model is developed that predicts the power conversion for a device that contains a piezoelectric component. Analysis is also done with AC/DC power conversion using a bridge rectifier circuit. Finally, the verification of the models is performed experimentally and comparison has been made with the simulation results. The comparison of simulation results coincide with experimental data quite well.


Keywords: PZT bimorph, PZT cantilever modeling, PZT generator


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