Performance of bistable piezoelectric cantilever vibration energy harvesters with an elastic support external magnet

This paper presents a folded nonlinear electro-magneto-mechanical (EMM) vibration-based piezoelectric energy harvester system, which is built on the cantilevered beam structure and consists of one host beam and two substrate plates. The performance of the linearity and nonlinearity to the proposed EMM system is evaluated and compared. Moreover, the voltage response in time history and the phase portrait are studied under an external rectifier circuit with a resistor. The results show that the nonlinearity of the reported EMM system changes the coherent resonance vibration mode from single to double under a harmonic base excitation within the frequency range of 20 Hz–50 Hz. Meanwhile, the substrate plate D contributes more averaged voltage output at a lower frequency while the substrate plate A contributes the voltage output at the relatively higher frequency for the nonlinear EMM system. The experimental study indicates that the proposed nonlinear EMM vibration-based piezoelectric energy harvester can yield a total voltage of 8.133 V@35.53 Hz while the baseline structure only produces 1.724 V@38.81 Hz. In addition, the bandwidth range of high-power output is enlarged by the nonlinear EMM system, which makes this device more flexible and applicable to absorb the wasted vibration energy generated by industrial machines and public facilities.

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“…Because the magnet is assumed as the rectangular one, then the repulsive force between them can be calculated by the following equation [25,26]:…”

Section: Design and Modeling Analysismentioning

confidence: 99%

Theoretical and Experimental Study of Nonlinear and Electro‐Magneto‐Mechanical‐Based Piezoelectric Vibration Energy Harvester

Sun

Zhang

2019

Shock and Vibration

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“…Suppose that a DE membrane undergoes a mechanical deformation that causes an increase in the effective area and reduction of its thickness, as shown in Figure 1(a). Therefore, the deformed DE membrane has an increased capacitance according to (1). The deformed DE membrane is then charged from an electrical power source.…”

Section: Basic Principle Of Dementioning

confidence: 99%

“…Vibrational energy recovered from various sources of ambient vibrations is considered to be renewable, clean and can be converted into electrical energy. The majority of investigations on energy harvesting (EH) from ambient vibrations so far have been focused on the use of piezoelectric (PZT) materials [1][2][3]. These PZT EH devices have simple structures and relatively high energy conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Energy harvesting from a DE-based dynamic vibro-impact system

Yurchenko

Val

Lai

et al. 2017

Smart Mater. Struct.

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Dielectric elastomer (DE) generators may be used in harvesting energy from ambient vibrations. Based on existing research on the mechanical properties of a circular DE membrane, a DEbased dynamic vibro-impact system is proposed in this paper to convert vibrational energy into electrical one. The dimensional, electrical and dynamic parameters of the DE membrane are analysed and then used to numerically estimate the output voltage of the proposed system. The system output performances under harmonic excitation are further discussed. At last, the comparison study has been conducted with an electromagnetic energy harvesting system, served as a "shaking" flashlight.

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“…e influence of bistable structure behavior in energy harvesting was further explored in several studies using an elastic support with an external magnet to induce bistable motion in the system at low-intensity vibrations [5,6]. Additional works on variations of this design have focused on optimizing the active piezoelectric area in the system [7], utilizing the softening nonlinearities of the piezoelectric materials to lower the operating frequency [8], and investigating a vertical configuration of the cantilevered beam to work as an energy harvester [9].…”

Section: Introductionmentioning

confidence: 99%

Snap‐Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester

Derakhshani

Berfield

2019

Shock and Vibration

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Vibration-based energy harvesting via microelectromechanical system- (MEMS-) scale devices presents numerous challenges due to difficulties in maximizing power output at low driving frequencies. This work investigates the performance of a uniquely designed microscale bistable vibration energy harvester featuring a central buckled beam coated with a piezoelectric layer. In this design, the central beam is pinned at its midpoint by using a torsional rod, which in turn is connected to two cantilever arms designed to induce bistable motion of the central buckled beam. The ability to induce switching between stable states is a critical strategy for boosting power output of MEMS. This study presents the formulation of a model to analyze the static and dynamic behaviors of the coupled structure, with a focus on the evolution of elongation strain within the piezoelectric layer. Cases of various initial buckling stress levels, driving frequencies, and driving amplitude were considered to identify regimes of viable energy harvesting. Results showed that bistable-state switching, or snap-through motion of the buckled beam, produced a significant increase in power production potential over a range of driving frequencies. These results indicate that optimal vibration scavenging requires an approach that balances the initial buckling stress level with the expected range of driving frequencies for a particular environment.

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Performance of bistable piezoelectric cantilever vibration energy harvesters with an elastic support external magnet

Cited by 74 publications

References 36 publications

Theoretical and Experimental Study of Nonlinear and Electro‐Magneto‐Mechanical‐Based Piezoelectric Vibration Energy Harvester

Theoretical and Experimental Study of Nonlinear and Electro‐Magneto‐Mechanical‐Based Piezoelectric Vibration Energy Harvester

Energy harvesting from a DE-based dynamic vibro-impact system

Snap‐Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester

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