Publication detail

Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

RUBEŠ, O. MACHŮ, Z. ŠEVEČEK, O. HADAŠ, Z.

Original Title

Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration

Type

journal article in Web of Science

Language

English

Original Abstract

Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.

Keywords

energy harvesting; piezoelectrics; bimorph; lead free ceramic; bistable energy harvester; nonlinear resonators

Authors

RUBEŠ, O.; MACHŮ, Z.; ŠEVEČEK, O.; HADAŠ, Z.

Released

14. 10. 2020

Publisher

MDPI

ISBN

1424-8220

Periodical

SENSORS

Year of study

20

Number

20

State

Swiss Confederation

Pages from

1

Pages to

18

Pages count

18

URL

https://www.mdpi.com/1424-8220/20/20/5808

Full text in the Digital Library

http://hdl.handle.net/11012/195586

BibTex

@article{BUT165594,
  author="Ondřej {Rubeš} and Zdeněk {Machů} and Oldřich {Ševeček} and Zdeněk {Hadaš}",
  title="Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration",
  journal="SENSORS",
  year="2020",
  volume="20",
  number="20",
  pages="1--18",
  doi="10.3390/s20205808",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/20/20/5808"
}