Hybrid vibration energy harvesting based on piezoelectric polyline beams with electret coupling

Abstract

Aiming at harvesting vibration energy more efficiently, a hybrid energy harvester is proposed, which integrates the piezoelectric and electrostatic effects. It is composed of two piezoelectric polyline beams and an electret film. The two piezoelectric polyline beams stand closely, of which one is covered by an electret film, while the other is covered by a counter-electrode. Under base excitations, the electret film interacts with the electrode, by which the two polyline beams can excite each other and form a broad frequency band of large vibration, thereby generating a large output. The dynamical equations are derived and the simulations are carried out. For validation, the experiments are conducted. The experimental results prove that the hybrid harvester is more efficient in harvesting stochastic vibration energy. For PSD = 0.0041 g2/Hz, the two piezoelectric polyline beams can generate the power outputs of 47.9 and 23.6 µW, respectively.

Harvesting vibration energy through a cantilever beam with enhanced harvesting capability

“…To achieve the maximum power output, many researches focused on the optimization of energy harvesting configurations to match the resonant conditions. Thus, proof masses (Friswell et al, 2012; Garg and Dwivedy, 2019) or different shape beams (Pan et al, 2021; Raju et al, 2019) are generally required, through which the natural frequencies of the harvesters can match with the ones of the external excitations. In literature, Zhao and Yang (2015) attached a beam stiffener to the substrate of the aeroelastic energy harvester, which dramatically enhanced its power generation ability.…”

Frequency‐tunable resonant hybrid vibration energy harvester using a piezoelectric cantilever with electret‐based electrostatic coupling

“…Compared to the bulk limitation of the magnet and the mechanical contacts required for triboelectricity, electretbased vibration energy harvesters featuring MEMS compatibility and high electric damping are easily integrated with PVEH on the micro scale to improve the output performance [19][20][21]. Pan et al [22] reported a hybrid energy harvester integrating a piezoelectric polyline beam and electret film. Affected by the electrostatic force introduced by electret film, the working frequency band of the harvester was expanded by 40% without necessitating additional volume.…”

“…Pan et al. [22] reported a hybrid energy harvester integrating a piezoelectric polyline beam and electret film. Affected by the electrostatic force introduced by electret film, the working frequency band of the harvester was expanded by 40% without necessitating additional volume.…”

Mechanically-driven energy harvester in railway freight system: Integrated modeling and performance analysis

“…Advanced energy harvesting technology and diverse renewable energy sources offer many implementation forms for energy conversion, such as solar (Cao et al, 2014; Perez-Rosado et al, 2015; Wang et al, 2021a), thermal (Ji et al, 2021; Sarris et al, 2022), wind (Sirohi and Mahadik, 2011; Wang et al, 2019), vibration energy harvesters (VEHs) (Yang et al, 2021; Zhou and Zuo, 2018; Zhou et al, 2017), and their hybrid application (Chen et al, 2021; Pan et al, 2022). In recent years, with the progress in performance and efficiency, vibration energy harvesting is considered to be promising and becomes a research hotspot (Bosso et al, 2021).…”