Experimental study on band merging of non-linear multi-band piezoelectric energy harvester into single broadband using magnetic coupling

Chandwani, Jaya; Somkuwar, Rohit; Deshmukh, Raghavendra B.

doi:10.1007/s00542-019-04597-8

Cited by 6 publications

(6 citation statements)

References 23 publications

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“…This process is observed for wider band at higher frequencies. These results are comparable with similar devices reported earlier (Chandwani et al 2019(Chandwani et al , 2020. The hollow proof mass is filled with liquid to increase the dynamic moving mass of the system.…”

Section: Standard Device With Liquid Filled Pmsupporting

confidence: 91%

“…The device reported in Chandwani et al (2020) with dimensions provided in Table 1 is referred as standard device. The standard device characteristics are plotted in Fig.4a.…”

Section: Standard Device With Liquid Filled Pmmentioning

confidence: 99%

“…Many structures are reported as wideband energy harvesters such as cantilever array (Chen et al 2015;Wen et al 2014;Liu et al 2008), magnetic tuning (Challa et al 2008;Zhu et al 2008Zhu et al , 2010, rolling masses (Somkuwar et al 2018;Chandwani et al 2019Chandwani et al , 2020, sliding mass (Miller et al 2013;Ahn et al 2018) and liquid-filled masses (Jackson et al 2015;Jackson and Stam 2018;Jackson 2020), are some of the methods used to tune the frequency of the system to the variable vibrating signal of the source.…”

Section: Introductionmentioning

confidence: 99%

“…Auto-tuning or self-tuning devices were reported in different literature that changes there CoG with change in input excitation and defines a new natural frequency. The wideband energy harvester is reported in Somkuwar et al (2018), Chandwani et al (2019), Chandwani et al (2020) where hollow PM encapsulates moving solid cylinders. For every shift in input excitation, cylinders roll inside the PM and occupy a new stable position resulting into new CoG for the device.…”

Section: Introductionmentioning

confidence: 99%

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Bandwidth widening of piezoelectric energy harvester by free moving cylinders in liquid medium

2020

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Ambient vibrations are one of the promising sources of energy harvesting to power up IoT and WSN nodes. Harvesting random vibrations requires the energy harvester to dynamically tune to the dominant vibration over large frequency band. The tuning is achieved with the help of auto/self-tunable, wideband or broadband energy harvesters. The reported cantilever based harvester is a wideband energy harvester which increases the bandwidth by immersing the moving mass in liquid medium. Splashing of liquid, viscous resistance offered to the moving mass, and the self weight of the liquid contributes to the improved performance over the moving mass based PEH reported earlier. Increased bandwidth is observed for system with two moving cylinders immersed in different liquids. Harvester's proof-mass height is another constraint used to observe the bandwidth change. Effect of viscosity of liquid, liquid filled percentage and amplitude of vibration are reported. The device with increased height of proof-mass and liquid filled for 50% volume shows 63.75% increase in bandwidth compared to the standard device without liquid.

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Section: Standard Device With Liquid Filled Pmsupporting

confidence: 91%

“…The device reported in Chandwani et al (2020) with dimensions provided in Table 1 is referred as standard device. The standard device characteristics are plotted in Fig.4a.…”

Section: Standard Device With Liquid Filled Pmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bandwidth widening of piezoelectric energy harvester by free moving cylinders in liquid medium

2020

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“…Therefore, the resonance frequency can be adjusted by adjusting the properties of the tip mass, such as the center of gravity of the proof mass. Based on this advantage, auto-tuning or self-tuning devices consisting of hollow masses that encapsulate moving cylinders inside were realized [ 24 , 25 , 26 ]. With the change in input excitation, the moving cylinder will occupy a new position inside the hollow mass, resulting in a new resonance frequency.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

2021

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Using the piezoelectric effect to harvest energy from surrounding vibrations is a promising alternative solution for powering small electronic devices such as wireless sensors and portable devices. A conventional piezoelectric energy harvester (PEH) can only efficiently collect energy within a small range around the resonance frequency. To realize broadband vibration energy harvesting, the idea of multiple-degrees-of-freedom (DOF) PEH to realize multiple resonant frequencies within a certain range has been recently proposed and some preliminary research has validated its feasibility. Therefore, this paper proposed a multi-DOF wideband PEH based on the frequency interval shortening mechanism to realize five resonance frequencies close enough to each other. The PEH consists of five tip masses, two U-shaped cantilever beams and a straight beam, and tuning of the resonance frequencies is realized by specific parameter design. The electrical characteristics of the PEH are analyzed by simulation and experiment, validating that the PEH can effectively expand the operating bandwidth and collect vibration energy in the low frequency. Experimental results show that the PEH has five low-frequency resonant frequencies, which are 13, 15, 18, 21 and 24 Hz; under the action of 0.5 g acceleration, the maximum output power is 52.2, 49.4, 61.3, 39.2 and 32.1 μW, respectively. In view of the difference between the simulation and the experimental results, this paper conducted an error analysis and revealed that the material parameters and parasitic capacitance are important factors that affect the simulation results. Based on the analysis, the simulation is improved for better agreement with experiments.

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Rosso

2024

SpringerBriefs in Applied Sciences and Technology

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Experimental study on band merging of non-linear multi-band piezoelectric energy harvester into single broadband using magnetic coupling

Cited by 6 publications

References 23 publications

Bandwidth widening of piezoelectric energy harvester by free moving cylinders in liquid medium

Bandwidth widening of piezoelectric energy harvester by free moving cylinders in liquid medium

A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

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