Electromechanical Modelling of a Piezoelectric Stack Energy Harvester

Proceedings

Tao, Kai¹  Bowen, Chris²  Evans, Matthew³  Tang, Lihua⁴  Hu, Aiguo P.⁵  Aw, Kean⁶ 

[1] Author to whom correspondence should be addressed.;Department of Electrical and Computer Engineering, University of Auckland, Auckland 1010, New Zealand;Department of Mechanical Engineering, University of Auckland, Auckland 1010, New Zealand;Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK;Department of Microsystems Engineering, Northwestern Polytechnical University, Xi’an 710072, China;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.

关键词: energy;    harvester;    piezo;    stack;    modelling;   

DOI  :  10.3390/proceedings2130733

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In this paper, the behavior of a piezoelectric stack generator subject to a direct mechanical force, such as that experienced by pedestrian loads, is characterized and modelled. A lumped element model is developed that describes the electrical output of piezoelectric stack generators for quasi-static, off-resonance and random input conditions which are typical of underfloor or supporting structure energy harvesters. This research demonstrates the ability for accurate predictions of output voltage and current based on the material properties and geometry of the piezoelectric stack. The behavior of real-world random loading patterns is incorporated in the model, pairing mechanical input with interfacing circuitry requirements in order to maximize energy transfer. The developed model facilitates time-efficient design by reducing the simulation time to the order of seconds.

【 授权许可】

CC BY