Power maximization from resonant electromagnetic vibration harvesters feeding bridge rectifiers

Costanzo, Luigi; Schiavo, Alessandro Lo; Vitelli, M.

doi:10.1002/cta.2574

Cited by 15 publications

(4 citation statements)

References 35 publications

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“…The feasibility of piezoelectric energy harvesting (PEH), already successfully demonstrated in many exciting application scenarios, 33–37 allows the conversion of mechanical movements into electricity. However, the application requirement typically mandates the PEH systems to operate in nonresonance conditions, leading to significant energy extraction degradation due to its inherent capacitance ( C p ).…”

Section: Energy Harvesting Interfacesmentioning

confidence: 99%

“…| ENERGY HARVESTING INTERFACESWith the emergence of IoE, the limited battery capacity for supporting various wearable and implantable devices is becoming a major bottleneck. Energy harvesting, which can theoretically achieve full system autonomy and even battery-less operation, is becoming an attractive system-level alternative.4.1 | Capacitive PEH interfaceThe feasibility of piezoelectric energy harvesting (PEH), already successfully demonstrated in many exciting application scenarios,[33][34][35][36][37] allows the conversion of mechanical movements into electricity. However, the application requirement typically mandates the PEH systems to operate in nonresonance conditions, leading to significant energy extraction degradation due to its inherent capacitance (C p ).…”

mentioning

confidence: 99%

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Bird's‐eye view of analog and mixed‐signal chips for the 21st century

Martins

Mak

Chan

et al. 2021

Circuit Theory & Apps

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SUMMARY The Internet of Everything (IoE), clearly a 21st century's technology, brilliantly plays with digital data obtained from analog sources, bringing together two different realities, the analog (physical/real), and the digital (cyber/virtual) worlds. Then, with the boundaries of IoE still analog in nature, the required functions at the interface involve sensing, measuring, filtering, converting, processing, and connecting, which imply that the analog layer governs the entire system in terms of accuracy and precision. Furthermore, such interface integrates several analog and mixed‐signal subsystems that comprise mainly signal transmission and reception, frequency generation, energy harvesting, data, and power conversion. This paper sets forth a state‐of‐the‐art design perspective of some of the most critical building blocks used in the analog/digital interface, covering wireless cellular transceivers, millimeter‐wave frequency generators, energy harvesting interfaces, plus, data and power converters, that exhibit high quality performance achieved through low‐power consumption, high energy‐efficiency, and high speed.

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Section: Energy Harvesting Interfacesmentioning

confidence: 99%

mentioning

confidence: 99%

Bird's‐eye view of analog and mixed‐signal chips for the 21st century

Martins

Mak

Chan

et al. 2021

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Therefore, a second objective to fulfill is the matching of the RVEH with its optimal load impedance, frequency by frequency. This is the aim of the so-called electrical tuning techniques (ETTs) [96][97][98][99][100][101][102]. It is worth noting that the application of the ETTs of course does not change the mechanical resonance frequency of a RVEH.…”

Section: Definition Of Tuning Techniquesmentioning

confidence: 99%

Tuning Techniques for Piezoelectric and Electromagnetic Vibration Energy Harvesters

Costanzo

Vitelli

2020

Energies

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This paper is focused on resonant vibration energy harvesters (RVEHs). In applications involving RVEHs the maximization of the extraction of power is of fundamental importance and a very crucial aspect of such a task is represented by the optimization of the mechanical resonance frequency. Mechanical tuning techniques (MTTs) are those techniques allowing the regulation of the value of RVEHs mechanical resonance frequency in order to make it coincident with the vibration frequency. A very great number of MTTs has been proposed in the literature and this paper is aimed at reviewing, classifying and comparing the main of them. In particular, some important classification criteria and indicators are defined and are used to put in evidence the differences existing among the various MTTs and to allow the reader an easy comparison of their performance. Finally, the open issues concerning MTTs for RVEHs are identified and discussed.

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“…Step-down piezoelectric transformers have been widely studied, and they have been developed with various circuit topologies and control techniques [8], [9], [10]. Most studies have concluded that DC transformers, including piezoelectric-based transformers, need to have a simple cir-cuit structure to take full advantage of their small size, and they should be operated at a frequency with the maximum gain under the maximum load condition to improve efficiency [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Design of High Efficiency Controller for Wide Input Range DC-DC Piezoelectric Transformer Converter

Yun

Kong

2020

IEEE Access

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Owing to the increasing demand for low-power electronic devices, the need for miniaturized, light-weight power supplies with a high power density is growing. A piezoelectric transformer, which is a mechanical resonance-based power transformer, can meet these requirements. However, piezoelectric transformers are based on mechanical resonance, and the resonance characteristics depend on the output current, temperature, and other parameters. Thus, their efficiency may rapidly reduce with changes in the resonance characteristics under specific load and temperature conditions. Therefore, this study proposes a technique that estimating the optimal frequency by using the measurements of the input voltage and current phase difference of the piezoelectric transformer and regulating the output voltage using the duty cycle. Modeling and control system analyses are performed to address the control interference problem caused by the plurality of control variables and control outputs. To demonstrate the proposed technique, a 40 W prototype hardware device is developed. The efficiency improvement is confirmed, and the analysis is validated.

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Power maximization from resonant electromagnetic vibration harvesters feeding bridge rectifiers

Cited by 15 publications

References 35 publications

Bird's‐eye view of analog and mixed‐signal chips for the 21st century

Bird's‐eye view of analog and mixed‐signal chips for the 21st century

Tuning Techniques for Piezoelectric and Electromagnetic Vibration Energy Harvesters

Design of High Efficiency Controller for Wide Input Range DC-DC Piezoelectric Transformer Converter

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