The Doubler of Electricity Used as Battery Charger

Queiroz, A.C.M. de; Domingues, Marcelo

doi:10.1109/tcsii.2011.2173963

Cited by 66 publications

(53 citation statements)

References 7 publications

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“…Inserting the piecewise description of U t into f t , in (11), allows a piecewise description of the transducer force, presented in (21). Thus, the simplified model of the system is given by the equation: (13). The figure describes the events during one half cycle of oscillations in the resonator: 0 ≤ τ < T 1 both diodes are off (stage 1), T 1 ≤ τ < T 0 /4 the second diode is on (stage 2), T 0 /2 ≤ τ < T 2 both diodes are off again (stage 3) and T 2 ≤ τ < T 0 /2 the first diode is on (stage 4).…”

Section: Simplified Modelmentioning

confidence: 99%

“…To have a full picture of the coupled electrical and mechanical domains, the system in both domains should be considered in some unified analysis. Very few works have addressed the coupling between the electrical and mechanical forces in eKEHs [12] and to the authors' best knowledge, no such analysis has been undertaken for conditioning circuits implementing a rectangular QV cycle (e.g., the Bennet's doubler, [13]). …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

O'Riordan

Dudka

Galayko

et al. 2015

IEEE Trans. Circuits Syst. I

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Section: Simplified Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

O'Riordan

Dudka

Galayko

et al. 2015

IEEE Trans. Circuits Syst. I

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“…The circuit consists of two variable capacitors, three diodes/switches and one fixed capacitor where the harvested energy is stored. When the voltage across the storage capacitor reaches a certain maximum value, the accumulated charge is then dumped into a battery by using a simple buck converter [12]. An attempt to increase charging current for the doubler circuit was reported in [13].…”

Section: Introductionmentioning

confidence: 99%

Comparative performance of voltage multipliers for MEMS vibration-based energy harvesters

Truong

Halvorsen

2018

J. Phys.: Conf. Ser.

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Abstract. This paper investigates by numerical simulation the performance of an electrostatic vibration energy harvester when it is electrically configured in two different diode-capacitor multiplier topologies. The complete lumped-model of an overlap-varying generator along with power electronic interface circuit is constructed for analysis using a crcuit simulator. Parasitic capacitance of the transducers and nonideal diode traits such as leakage current and junction capacitance are incorporated. We find that both configurations are able to efficiently operate with a ratio of capacitance variation much lower than 2, which overcomes a challenging obstacle of MEMS-based devices. Other advantages and disadvantages of the two topologies are compared and discussed.

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“…In the electrical domain, these circuits show no saturation of the harvested power over time of operation. Moreover, these circuits are inductorless and do not require any external command for synchronization [2,3]. This paper presents the first experiment combining the Bennet's doubler conditioning circuit, which will be called the unstable auto-synchronous conditioning circuit in the rest of the paper, Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic vibration energy harvester using an electret-charged mems transducer with an unstable auto-synchronous conditioning circuit

Karami

Basset

Galayko

2015

J. Phys.: Conf. Ser.

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A new autostabilization mechanism in the Bennet doubler circuit-based electrostatic vibrational energy harvester V.P. Abstract.This paper reports for the first time experiments using an electrostatic vibration energy harvester comprised of a low voltage electret-charged MEMS transducer joined to an unstable autosynchronous conditioning circuit with rectangular charge-voltage characteristic, also known as the Bennet's doubler conditioning circuit. The experimental results show that the electret voltage, even if of low value, can be used as the necessary pre-charge for these type of electrostatic vibration energy harvesters. Also, the use of such a conditioning circuit with a low-voltage electret capacitive MEMS tranducer instead of the previously-reported conditioning circuits with direct connection to load or through a rectifier, can be advantageous in terms of maximal harvested power for a low-voltage electret, showing up to 95% higher converted power. IntroductionIn the recent years, extensive research has been done on electret-based electrostatic vibration energy harvesters (e-VEHs). High-voltages electret have enabled the realization of e-VEHs with relatively high harvested power density from relatively high-gap and/or in-plane moving electrode capacitive transducers [1]. These electret e-VEHs have been experimentally tested using either a direct connection to an impedance-matched load -also known as the primitive conditioning circuit -, or simple conditioning circuits consisting of a diode bridge connected to an impedance-matched load, with or without the use of a smoothing capacitor.However, electrets may be subject to degradation resulting in the decrease of their built-in voltage over time. This problem is strongly linked to the materials and the technology used to implement the charged electret layer. As the electret voltage decreases, so does the converted power if using the previously-mentioned conditioning circuits.Notwithstanding this decrease of the electret built-in voltage, recently, a new class of conditioning circuits was discovered: inspired from the "Bennet's doubler of electricity", they allow an exponential self-increase of their biasing, and thus of the converted power, at the small cost of a low pre-charge voltage. In the electrical domain, these circuits show no saturation of the harvested power over time of operation. Moreover, these circuits are inductorless and do not require any external command for synchronization [2,3]. This paper presents the first experiment combining the Bennet's doubler conditioning circuit, which will be called the unstable auto-synchronous conditioning circuit in the rest of the paper,

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The Doubler of Electricity Used as Battery Charger

Cited by 66 publications

References 7 publications

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

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

Comparative performance of voltage multipliers for MEMS vibration-based energy harvesters

Electrostatic vibration energy harvester using an electret-charged mems transducer with an unstable auto-synchronous conditioning circuit

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