Capacitive Energy Conversion With Circuits Implementing a Rectangular Charge-Voltage Cycle Part 2: Electromechanical and Nonlinear Analysis

O'Riordan, Eoghan; Dudka, Andrii; Galayko, Dimitri; Basset, Philippe; Feely, Orla; Blokhina, Elena

doi:10.1109/tcsi.2015.2451913

Cited by 19 publications

(17 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus the bi modal behavior can only be caused by the nonlinear terms. This behavior of Duffing oscillators is widely discussed in the literature [25][26][27][28]. The two modes correspond to two different forced vibrations in the resonator, one with large amplitude and the other with smaller amplitude.…”

Section: Optimization and Multi-stability Due To Nonlinear Stoppersmentioning

confidence: 74%

A batch-fabricated electret-biased wideband MEMS vibration energy harvester with frequency-up conversion behavior powering a UHF wireless sensor node

O'Riordan

Cottone

et al. 2016

J. Micromech. Microeng.

View full text Add to dashboard Cite

This paper reports a batchfabricated, lowfrequency and wideband MEMS electrostatic vibration energy harvester (eVEH), which implements coronacharged vertical electrets and nonlinear elastic stoppers. A numeric model is used to perform parametric study, where we observe a wideband bimodality resulting from nonlinearity. The nonlinear stoppers improve the bandwidth and induce a frequencyup feature at low frequencies. When the eVEH works with a bias of 45 V, the power reaches a maximum value of 6.6 μW at 428 Hz and 2.0 g rms , and is above 1 μW at 50 Hz. When the frequency drops below 60 Hz, a 'frequencyup' conversion behavior is observed with peaks of power at 34 Hz and 52 Hz. The −3 dB bandwidth is more than 60% of its central frequency, both including and excluding the hysteresis introduced by the nonlinear stoppers. We also perform experiments with wideband Gaussian noise. The device is eventually tested with an RF data transmission setup, where a communication node with an internal temperature sensor is powered. Every 2 min, a data transmission at 868 MHz is performed by the sensor node supplied by the eVEH, and received at a distance of up to 15 m.

show abstract

Section: Optimization and Multi-stability Due To Nonlinear Stoppersmentioning

confidence: 74%

A batch-fabricated electret-biased wideband MEMS vibration energy harvester with frequency-up conversion behavior powering a UHF wireless sensor node

O'Riordan

Cottone

et al. 2016

J. Micromech. Microeng.

View full text Add to dashboard Cite

show abstract

“…The inequality C var(p,n) < C var(p+1,n) comes from the hypothesis (15). Note that, under this hypothesis, at a given cycle at C var = C min , (20) is equivalent to, for the same cycle at…”

Section: B Half-cycle: Increasing Variable Capacitancementioning

confidence: 98%

“…Note that, as the voltages are supposed ordered as in (15), and as the voltages across the capacitors vary continuously t n t n,1 · · · t n,p t n .…”

Section: B Half-cycle: Increasing Variable Capacitancementioning

confidence: 99%

Series-Parallel Charge Pump Conditioning Circuits for Electrostatic Kinetic Energy Harvesting

Karami

Galayko

Basset

2017

IEEE Trans. Circuits Syst. I

Self Cite

View full text Add to dashboard Cite

International audienceThis paper presents a new family of conditioning circuits used in electrostatic kinetic energy harvesters (e-KEHs), generalizing a previously reported conditioning circuit known as the Bennet's doubler. The proposed topology implements a conditioning scheme described by a rectangular charge-voltage cycle (QV-cycle) of tunable aspect ratio. These circuits show an exponential increase of the converted energy over operation time if studied in the sole electrical domain. The QV-cycle's aspect ratio can be set to values that were previously inaccessible with other exponential conditioning circuits. After a brief intuitive presentation of the new topology, its operation is rigorously analyzed and its dynamics are quantitatively derived in the electrical domain. In particular, the aspect ratio of the rectangular QV-cycle describing the biasing scheme of the transducer is expressed as a function of the circuit's parameters. Practical considerations about the use of the reported conditioning circuits in actual e-KEHs are also presented. These include a discussion on the applications of the proposed conditioning, a description of the effects of electrical nonidealities, and a proposition of an energy extracting interface

show abstract

“…An equation can be derived from (10) which describes the resonance frequency shift of the oscillations, given by: Even in cases when the MSM approach is not as accurate, eq. (13) provides a very good indication of the magnitude of the shift in oscillations [27]. Equation (13) highlights the dependence of the resonance frequency shift on the first Fourier cosine term of the transducer force, and as this term is nonzero we will have a frequency shift for different system parameters.…”

Section: Resonance Frequency Shiftmentioning

confidence: 99%

“…The occurrence of more than one stable solution of the system is caused by the nonlinear electromechanical coupling. The Method of Multiple Scales can provide further insight into such regions of nonlinear behaviour [27].…”

Section: Resonance Frequency Shiftmentioning

confidence: 99%

Complete electromechanical analysis of electrostatic kinetic energy harvesters biased with a continuous conditioning circuit

O'Riordan

Galayko

Basset

et al. 2016

Sensors and Actuators A: Physical

Self Cite

View full text Add to dashboard Cite

Capacitive Energy Conversion With Circuits Implementing a Rectangular Charge-Voltage Cycle Part 2: Electromechanical and Nonlinear Analysis

Cited by 19 publications

References 23 publications

A batch-fabricated electret-biased wideband MEMS vibration energy harvester with frequency-up conversion behavior powering a UHF wireless sensor node

A batch-fabricated electret-biased wideband MEMS vibration energy harvester with frequency-up conversion behavior powering a UHF wireless sensor node

Series-Parallel Charge Pump Conditioning Circuits for Electrostatic Kinetic Energy Harvesting

Complete electromechanical analysis of electrostatic kinetic energy harvesters biased with a continuous conditioning circuit

Contact Info

Product

Resources

About