Piezoelectric Energy Harvesting under High Pre-Stressed Cyclic Vibrations

Kim, Hyeoung Woo; Priya, Shashank; Uchino, Kenji; Newnham, R. E.

doi:10.1007/s10832-005-0897-z

Cited by 177 publications

(108 citation statements)

References 6 publications

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“…The conversion efficiency is small and around 18% for very small load at r = 0.1, and is increasing as the resistance becomes large. According to (23), it achieves its maximum value…”

Section: Weak Electromechanical Couplingmentioning

confidence: 99%

Efficiency of energy conversion for a piezoelectric power harvesting system

Shu

Lien

2006

J. Micromech. Microeng.

284

204

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This paper studies the energy conversion efficiency for a rectified piezoelectric power harvester. An analytical model is proposed, and an expression of efficiency is derived under steady-state operation. In addition, the relationship among the conversion efficiency, electrically induced damping and ac-dc power output is established explicitly. It is shown that the optimization criteria are different depending on the relative strength of the coupling. For the weak electromechanical coupling system, the optimal power transfer is attained when the efficiency and induced damping achieve their maximum values. This result is consistent with that observed in the recent literature. However, a new finding shows that they are not simultaneously maximized in the strongly coupled electromechanical system.

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“…The conversion efficiency is small and around 18% for very small load at r = 0.1, and is increasing as the resistance becomes large. According to (23), it achieves its maximum value…”

Section: Weak Electromechanical Couplingmentioning

confidence: 99%

Efficiency of energy conversion for a piezoelectric power harvesting system

Shu

Lien

2006

J. Micromech. Microeng.

284

204

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show abstract

“…The recent progress in power harvesting from mechanical vibration to power generation was performed at Pennsylvania State University. [8][9][10] These studies were made on a cymbal transducer having a ceramic dise with a diameter of 29 mm and 1 mm thickness. A power of 39 mW can be transferred across the low impedance load under a dynamic force of 7.8 N at 100 Hz.…”

mentioning

confidence: 99%

Energy harvesting with piezoelectric drum transducer

Wang

Lam

Sun

et al. 2007

Applied Physics Letters

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Piezoelectric materials can convert ambient vibrations into electrical energy. In this letter, the capability of harvesting the electrical energy from mechanical vibrations in a dynamic environment through a piezoelectric drum transducer has been investigated. Under a prestress of 0.15 N and a cyclic stress of 0.7 N, a power of 11 mW was generated at the resonance frequency of the transducer ͑590 Hz͒ across an 18 k⍀ resistor. It is found that the energy from the transducer increases while the resonance frequency of the transducer decreases when the prestress increases. The results demonstrate the potential of the drum transducer in energy harvesting. © 2007 American Institute of Physics. ͓DOI: 10.1063/1.2713357͔With the recent advances in wireless and microelectromechanical systems technology, the demand for portable electronics and wireless sensors is growing rapidly. Since these devices are portable, it becomes necessary to carry their own power supply. Piezoelectric materials are ideal sources of such energy because they can convert mechanical strain energy into electrical energy or vice versa. Energy can be reclaimed and stored for later use to recharge a battery or power a device through a process called energy harvesting. Many researchers have studied the concept of utilizing piezoelectric material for energy generation over the past few decades. 1-5 In one prototype of power harvesting system, a polyvinylidene fluoride film was used and implemented in vivo on a mongrel dog. The feasibility of extracting energy from the expansion and contraction of the rib cage during breathing was explored in 1984. 6 The power harvesting system produces a peak voltage of 18 V, which corresponded to a power of about 17 W. Another investigation for power harvesting from ambulation to provide supplemental power to operate artificial organs by using lead zirconate titanate ͑PZT͒-based piezoelectric stacks during walking or jogging was performed by Antaki et al. in 1995. 7 An average power of 250-700 mW was extracted from walking, and over 2 W was obtained from jogging. The recent progress in power harvesting from mechanical vibration to power generation was performed at Pennsylvania State University. [8][9][10] These studies were made on a cymbal transducer having a ceramic dise with a diameter of 29 mm and 1 mm thickness. A power of 39 mW can be transferred across the low impedance load under a dynamic force of 7.8 N at 100 Hz. The effective piezoelectric field constant of the material is a crucial parameter for selecting an element of the piezoelectric energy harvesting device, which is proportional to the harvested power. In this letter, a drum transducer was studied as the energy harvesting device because it was reported previously that the drum transducer has good electrical and mechanical performance. 11 It is expected that the energy harvesting performance of the drum transducer can be better than that of the cymbal transducer. The electrical power generation from a single drum transducer element under a cyclic force ...

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“…The displacement difference percent with and without cymbal can be calculated by Eq. (12). As shown in …”

Section: Coupling With Pavementmentioning

confidence: 78%

“…12) Based on the same Cymbal, the stress distribution in PZT of the Cymbal under 70 N at 100 Hz was explored via FEA.…”

Section: Literature Reviewmentioning

confidence: 99%

Finite element analysis of Cymbal piezoelectric transducers for harvesting energy from asphalt pavement

Zhao

Ling

2010

J. Ceram. Soc. Japan

122

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The purpose of this paper is to design a Cymbal for harvesting energy from asphalt pavement. Asphalt pavement is used popular on road. Part of the energies in the pavement caused by vehicle and gravity can be harvested by piezoelectric transducers. Cymbal is selected to harvest energy from asphalt pavement because of its low cost, high reliability and reasonable efficiency. The efficiency and coupling effects with pavement of Cymbals with various sizes are discussed through finite element analysis (FEA). The displacement difference at pavement surface between with and without Cymbal is developed to considering the coupling effects. The results show that the potential electric energy harvested from pavement increases with the diameter of Cymbal. However, the efficiency decreases with the increasing of Cymbal size. The diameter at 32 mm is suggested as the size of Cymbal. The potential electric energy increases near linearly with the diameter of end cap cavity base. Enough bonding area should be left to bond the end steel cap and PZT. There is a maximum electric energy existing when the top diameter of the end steel cap changes. The maximum electric energy is generated when the thickness of cap steel is about 0.3 mm. There is also a maximum electric energy existing when the height of end cap cavity changes. The Cymbals with thicker PZT can generate higher electric potential and storage electric energy. Considering the storage electric energy, cost, bonding between end steel cap and PZT and the pavement surface displacement, the Cymbal with 32 mm of total diameter, 22 mm of cavity base diameter, 10 mm of end cap top diameter, 0.3 mm of cap steel thickness, 2 mm of cavity height and 2 mm of PZT thickness is suggested as the optimum one for harvesting energy from asphalt pavement. The electric potential is about 97.33 V of the design Cymbal. 0.06 J electric energy can be storage in that Cymbal. Its potential maximum output power is about 1.2 mW at 20 Hz vehicle load frequency.

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Piezoelectric Energy Harvesting under High Pre-Stressed Cyclic Vibrations

Cited by 177 publications

References 6 publications

Efficiency of energy conversion for a piezoelectric power harvesting system

Efficiency of energy conversion for a piezoelectric power harvesting system

Energy harvesting with piezoelectric drum transducer

Finite element analysis of Cymbal piezoelectric transducers for harvesting energy from asphalt pavement

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