Electrostatic energy harvesting using capacitive generators without control circuits

Queiroz, A.C.M. de

doi:10.1007/s10470-015-0577-0

Cited by 17 publications

(5 citation statements)

References 8 publications

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“…Therefore, the maximum output power improvement ratio of the FAR-FC circuit can be expressed as: 20) Optimization of an SSHC-Based Full Active Rectifier for PEH…”

Section: Voltage Regulator (Vr)mentioning

confidence: 99%

“…These are often used where mechanical vibration permanently or frequently occurs, such as the passing of vehicles, engines, or human movements [11,[17][18][19]. Among all vibration-based energy harvesting implementations, piezoelectric energy harvesting (PEH) is widely employed due to its high power density, scalability and compatibility with conventional integrated circuit technologies compared to other implementations, such as electromagnetic and electrostatic harvesters [20,21]. The direct effect of the piezoelectric material causes the generating of an electrical charge when a mechanical strain is applied to it.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of an SSHC-based full active rectifier for piezoelectric energy harvesting

Wassouf,

Jamshidpour,

Frick

2023

Analog Integr Circ Sig Process

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This paper presents a compact and efficient integrated interface circuit for piezoelectric energy harvesting. While the state-of-the-art interface circuits require the use of either an external inductor or a significant number of additional capacitors to achieve high voltage flip and improve power efficiency, the proposed Full Active Rectifier on Flipping Capacitor (FAR-FC) is based on a reduced set of flipping capacitors and an active rectifier to efficiently flip the voltage across the piezoelectric transducer. In addition, this optimized SSHC circuit reaches better power efficiency when the piezoelectric transducer is operating under low mechanical excitation, i.e. when the open-circuit voltage of the piezoelectric transducer is V oc = 1V , while this value is usually V oc ≥ 2V in literature. Furthermore, the FAR-FC supports piezoelectric transducers with higher inherent capacitance values compared to those usually reported in literature, which makes the circuit potentially suitable for a larger variety of MEMS applications. The interface circuit was designed and fabricated in a 0.35-µm CMOS process. Measurement results show that the voltage flip efficiency goes up to 90%. It also reveals that the proposed FAR-FC circuit achieves power performance up to 5.64× higher than a conventional full-bridge rectifier.

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“…Therefore, the maximum output power improvement ratio of the FAR-FC circuit can be expressed as: 20) Optimization of an SSHC-Based Full Active Rectifier for PEH…”

Section: Voltage Regulator (Vr)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of an SSHC-based full active rectifier for piezoelectric energy harvesting

Wassouf,

Jamshidpour,

Frick

2023

Analog Integr Circ Sig Process

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“…Yen and Lang [168] have developed an asynchronous diode-based charge pump-based electrostatic harvester, which can generate 1.8 μW outputs. To overcome the pre-charging problem, the idea of the ‘‘doubler of electricity’’ or ‘‘Bennet’s doubler’’ is adapted to eliminating the need of batteries or other devices for pre-charging [169,170,171]. Although the researchers have designed various circuit structures to exclude the external power supply requirements, the low output power means that electrostatic EH technology cannot be used alone in the process of self-powered WSN-based machine condition monitoring.…”

Section: Energy Harvesting Techniques and Applicationsmentioning

confidence: 99%

Energy Harvesting Technologies for Achieving Self-Powered Wireless Sensor Networks in Machine Condition Monitoring: A Review

Tang

Wang

Cattley

et al. 2018

Sensors

192

106

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Condition monitoring can reduce machine breakdown losses, increase productivity and operation safety, and therefore deliver significant benefits to many industries. The emergence of wireless sensor networks (WSNs) with smart processing ability play an ever-growing role in online condition monitoring of machines. WSNs are cost-effective networking systems for machine condition monitoring. It avoids cable usage and eases system deployment in industry, which leads to significant savings. Powering the nodes is one of the major challenges for a true WSN system, especially when positioned at inaccessible or dangerous locations and in harsh environments. Promising energy harvesting technologies have attracted the attention of engineers because they convert microwatt or milliwatt level power from the environment to implement maintenance-free machine condition monitoring systems with WSNs. The motivation of this review is to investigate the energy sources, stimulate the application of energy harvesting based WSNs, and evaluate the improvement of energy harvesting systems for mechanical condition monitoring. This paper overviews the principles of a number of energy harvesting technologies applicable to industrial machines by investigating the power consumption of WSNs and the potential energy sources in mechanical systems. Many models or prototypes with different features are reviewed, especially in the mechanical field. Energy harvesting technologies are evaluated for further development according to the comparison of their advantages and disadvantages. Finally, a discussion of the challenges and potential future research of energy harvesting systems powering WSNs for machine condition monitoring is made.

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“…The fundamental transduction pathways that can be utilized for this purpose were explained by them, as well as a simplified lumped-parameter base excitation framework to simulate the electrical power generation for electromagnetic energy harvesting [1]. Electrostatic [2], piezoelectric [3,4] and electromagnetic [5] transductions are the three basic vibration-to-electric energy conversion mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermal Performance of Bimorph Piezoelectric Energy Harvesters

Shirbani

Alavi

Hassani

2023

Preprint

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Temperature gradients haven't been discussed much in the past, but these harvesting systems might be exposed to them. Temperature changes will affect the shape of the piezoelectric layers, so in order to bring the study conditions of these harvesters closer to the real conditions, the effect of temperature gradient should be investigated. The proposed method employs a clamped beam with a three-layer configuration. Two layers of PZT-5H piezoelectric material and a middle layer of aluminum material are used. The base vibrations applied to the harvester beam and the temperature difference between the layers of the harvester will cause mechanical stress in the piezoelectric layers. With the analytical modeling of the governing structural equations and the use of Ohm's and Gauss's laws, as well as considering the temperature difference of the harvester beam surfaces and assuming constant heat transfer without a heat source, coupled mechanical-electrical-thermal differential equations based on Euler-Bernoulli's assumptions are extracted. The results for two symmetric and asymmetric modes have been presented in this work, and temperature changes have been modeled. The results indicate that the best case for harvesting energy is one where the thickness of the piezoelectric layers is twice that of the homogeneous layer, and the best connection is also a series connection. The highest harvested power density corresponds to 70°C.

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Electrostatic energy harvesting using capacitive generators without control circuits

Cited by 17 publications

References 8 publications

Optimization of an SSHC-based full active rectifier for piezoelectric energy harvesting

Optimization of an SSHC-based full active rectifier for piezoelectric energy harvesting

Energy Harvesting Technologies for Achieving Self-Powered Wireless Sensor Networks in Machine Condition Monitoring: A Review

Analysis of Thermal Performance of Bimorph Piezoelectric Energy Harvesters

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