Modeling and performance analysis of a novel M-shaped piezoelectric energy harvester employing magnets
- PDF / 1,579,265 Bytes
- 11 Pages / 595.22 x 842 pts (A4) Page_size
- 18 Downloads / 195 Views
DOI 10.1007/s12206-020-0807-y
Journal of Mechanical Science and Technology 34 (9) 2020 Original Article DOI 10.1007/s12206-020-0807-y Keywords: · Piezoelectric energy harvester · Magnet · Voltage frequency response · Broadband · Power
Correspondence to: Hong Hee Yoo [email protected]
Citation: Lim, S. K., Yoo, H. H. (2020). Modeling and performance analysis of a novel Mshaped piezoelectric energy harvester employing magnets. Journal of Mechanical Science and Technology 34 (9) (2020) ?~?. http://doi.org/10.1007/s12206-020-0807-y
Received February 24th, 2020 Revised
Modeling and performance analysis of a novel M-shaped piezoelectric energy harvester employing magnets Sun Keol Lim1 and Hong Hee Yoo2 1
2
Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Korea, School of Mechanical Engineering, Hanyang University, Seoul 04763, Korea
Abstract
Piezoelectric energy harvesters convert the vibration energy of a mechanical system into the electrical energy. Among them, cantilever type is the most popular one. With the cantilever type harvester, however, generated voltage decreases rapidly when excitation frequency deviates from the natural frequency of the harvester. To overcome the weakness and achieve good voltage generation performance, we proposed a new M-shaped energy harvester using two sets of magnets. We derived the coupled electromechanical equations and investigated the performance of generated voltage and power using the equation model. By controlling the distance between two magnets in a set, we could design an energy harvester having either a large single peak or broadband voltage frequency response characteristic. We could also achieve a better power generation performance with the novel M-shaped piezoelectric harvester.
May 19th, 2020
Accepted June 22nd, 2020 † Recommended by Editor No-cheol Park
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
1. Introduction Energy harvesting refers to the technology of producing electrical energy using external energy that exists in surrounding environment, such as solar energy, wind energy, thermal energy, and vibration energy. Recently, due to the necessity to develop small size electronic products, technologies to reduce the size of battery have greatly progressed. For the purpose of battery size minimization, energy harvesting technology has come into the spotlight. We also have used the energy harvesting technology for a system in which it is difficult to include a battery. We can classify the energy harvesting technology into thermoelectric, electromagnetic, photoelectric, and piezoelectric groups. Among them, piezoelectric harvesting refers to a technology that uses pressure or vibration applied to piezoelectric material to generate electricity. Piezoelectric energy harvesters generate electricity by taking advantage of piezo material deformation that usually results from the vibration of the body where we attach the piezo material. Among piezoelectric energy har
Data Loading...
