Rotational energy harvesting using bi-stability and frequency up-conversion for low-power sensing applications: Theoretical modelling and experimental validation

Fu, Hailing; Yeatman, Eric M.

doi:10.1016/j.ymssp.2018.04.043

Cited by 214 publications

(85 citation statements)

References 53 publications

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“…Rotational mechanical energy is one of the important power sources for piezoelectric energy harvesting. Different types of rotational power sources have been used in the past decades for piezoelectric energy harvestings, such as rotational machines [6][7][8][9][10], human motion [11,12], vehicle tires [13][14][15][16][17], and even air, wind and fluids [18][19][20][21][22][23][24]. They have been applied in different applications such as WSNs in any rotary machine [8,25], tire pressure-monitoring systems (TPMSs) [26][27][28], wearable devices, and medical implants [29][30][31][32].…”

Section: Of 25mentioning

confidence: 99%

Harvesting Energy from Planetary Gear Using Piezoelectric Material

et al. 2020

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In the present study, a rotational piezoelectric (PZT) energy harvester has been designed, fabricated and tested. The design can enhance output power by frequency up-conversion and provide the desired output power range from a fixed input rotational speed by increasing the interchangeable planet cover numbers which is the novelty of this work. The prototype ability to harvest energy has been evaluated with four experiments, which determine the effect of rotational speed, interchangeable planet cover numbers, the distance between PZTs, and PZTs numbers. Increasing rotational speed shows that it can increase output power. However, increasing planet cover numbers can increase the output power without the need to increase speed or any excitation element. With the usage of one, two, and four planet cover numbers, the prototype is able to harvest output power of 0.414 mW, 0.672 mW, and 1.566 mW, respectively, at 50 kΩ with 1500 rpm, and 6.25 Hz bending frequency of the PZT. Moreover, when three cantilevers are used with 35 kΩ loads, the output power is 6.007 mW, and the power density of piezoelectric material is 9.59 mW/cm3. It was concluded that the model could work for frequency up-conversion and provide the desired output power range from a fixed input rotational speed and may result in a longer lifetime of the PZT.

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Section: Of 25mentioning

confidence: 99%

Harvesting Energy from Planetary Gear Using Piezoelectric Material

et al. 2020

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“…Hoffmann et al [23,24] developed a harvesting system capable to autonomously adapt the magnetic field strength, acting on the resonator, by adjusting the orientation of a diametrically polarized permanent magnet. Another bistable rotational energy harvester operating at low frequencies has been proposed by Fu and Yeatman in [25,26]. The harvesting is achieved by magnetic plucking of a piezoelectric cantilever using a driving magnet mounted on a rotating platform.…”

Section: Introductionmentioning

confidence: 99%

System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

et al. 2020

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In this paper, we present a macroscale multiresonant vibration-based energy harvester. The device features frequency tunability through magnetostatic actuation on the resonator. The magnetic tuning scheme uses external magnets on linear stages. The system-level model demonstrates autonomous adaptation of resonance frequency to the dominant ambient frequencies. The harvester is designed such that its two fundamental modes appear in the range of (50,100) Hz which is a typical frequency range for vibrations found in industrial applications. The dual-frequency characteristics of the proposed design together with the frequency agility result in an increased operative harvesting frequency range. In order to allow a time-efficient simulation of the model, a reduced order model has been derived from a finite element model. A tuning control algorithm based on maximum-voltage tracking has been implemented in the model. The device was characterized experimentally to deliver a power output of 500 µW at an excitation level of 0.5 g at the respected frequencies of 63.3 and 76.4 Hz. In a design optimization effort, an improved geometry has been derived. It yields more close resonance frequencies and optimized performance.

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“…Kan et al [33] presented a piezo-windmill that is excited by rotating magnets to harvest low and wide range wind speed. Fu and Yeatman [34] developed a rotational harvester with bi-stability and frequency up-conversion to harness low rotation speed kinetic energy with a wide bandwidth. Zou et al [35] designed a magnetically coupled flextensional rotation energy harvester that consists of flextensional transducers and rotating magnets.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Investigation of a Piezoelectric Rotation Energy Harvester Using Bistable and Frequency Up-Conversion Mechanisms

et al. 2018

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Harvesting energy from rotational motion for powering low-power electrical devices is attracting increasing research interest in recent years. In this paper, a magnetic-coupled buckled beam piezoelectric rotation energy harvester (MBBP-REH) with bistable and frequency up-conversion is presented to harvest low speed rotational energy with a broadband. A buckled beam attached with piezoelectric patches under dynamical axial load enables the harvester to achieve high output power under small excitation force. The electromechanical coupling dynamical model is developed to characterize the MBBP-REH. Both the simulations and experiments are carried out to evaluate the performance of the harvesters in various conditions under different excitations. The experimental results indicate that the proposed harvester is applicable for low speed rotation and can generate stable output power under wideband rotating excitation. For the harvester with two magnets that produce attractive forces with the center magnet of the buckled beam, the average power is 682.7 μW and the maximum instantaneous power is 1450 μW at 360 r/min.

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Rotational energy harvesting using bi-stability and frequency up-conversion for low-power sensing applications: Theoretical modelling and experimental validation

Cited by 214 publications

References 53 publications

Harvesting Energy from Planetary Gear Using Piezoelectric Material

Harvesting Energy from Planetary Gear Using Piezoelectric Material

System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

Design and Experimental Investigation of a Piezoelectric Rotation Energy Harvester Using Bistable and Frequency Up-Conversion Mechanisms

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