Two-Capacitor Electrostatic Microgenerators

Baginsky, I. L.; Kostsov, E. G.; Kamishlov, Victor F.

doi:10.4236/eng.2013.511a002

Cited by 7 publications

(8 citation statements)

References 29 publications

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“…[1] In response to this challenge, the past decade has seen a huge effort to develop energy harvesters, especially for lowfrequency energy harvesting. [2][3][4] A series of energy harvesters have been developed to convert low-frequency mechanical energy to electrical energy, such as double-electrical-layer energy harvester, [5] two-capacitor electrostatic generator, [6] and triboelectric nanogenerator (TENG). [7] Core working mechanism of these generators can be classified based on the changing behavior of capacitances.…”

Section: Doi: 101002/advs202201098mentioning

confidence: 99%

“…The Zener diode is used to stabilize the voltage to avoid the dielectric elastomer film breakdown by releasing the surplus charges. [14,27] Inspired by alternative-current nanogenerators, [5][6][7]13] external loads, or rectifiers, are placed between the DEC and the pump circuit for harvesting energy ( than the sum of the voltage on two individual capacitors in the circuit, the diode will cause D 2 conduct and therefore two capacitors will be connected in series. The partial charges stored on the DEC will be transferred from the DEC to the circuit, as shown on the left of Figure 1I.…”

Section: Structural Design and Working Mechanism Of Dengmentioning

confidence: 99%

“…A series of energy harvesters have been developed to convert low‐frequency mechanical energy to electrical energy, such as double‐electrical‐layer energy harvester, [ 5 ] two‐capacitor electrostatic generator, [ 6 ] and triboelectric nanogenerator (TENG). [ 7 ] Core working mechanism of these generators can be classified based on the changing behavior of capacitances.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

Bao

et al. 2022

Advanced Science

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Soft, low‐cost, high‐performance generators are highly desirable for harvesting ambient low frequency mechanical energy. Here, a dielectric elastomer nanogenerator (DENG) is reported, which consists of a dielectric elastomer capacitor, an electret electrostatic voltage source, and a charge pump circuit. Under biaxial stretching, DENG can convert tensile mechanical energy into electrical power without any external power supply. Different from traditional DEG with the charge outward transfer in direct current (DC), the DENG works based on shuttle movement of internal charges in an alternating current (AC). Through alternating current (AC) method, the charge density of the DENG can reach 26 mC m−2 per mechanical cycle, as well as energy density of up to 140 mJ g−1. Due to the all‐solid‐state structure without air gap, the DENG is capable of working stably under different ambient humidity (20 RH%–100 RH%). To demonstrate the applications, a water wave harvester based on the DENG is constructed. The integrated device powers a sensing communication module for self‐powered remote weather monitoring, showing the potential application in ocean wave energy harvesting.

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Section: Doi: 101002/advs202201098mentioning

confidence: 99%

Section: Structural Design and Working Mechanism Of Dengmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

Bao

et al. 2022

Advanced Science

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“…Harvesting vibration energy from human body can also be achieved by an electrostatic generator [85]. In essence, such devices are mechanically variable capacitors of which plates are separated by the movement of the source [86]. Accordingly, the electrostatic capacitive energy converter can be employed to realize vibration-to-electricity energy conversion, but the efficiency is not as high as expected [87,88].…”

Section: Electrostatic Energy Conversionmentioning

confidence: 99%

Overview of Human Walking Induced Energy Harvesting Technologies and Its Possibility for Walking Robotics

2019

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This study is mainly to provide an overview of human walking induced energy harvest. Focusing on the proportion of all energy sources provided by daily activity, the available human walking induced energy is divided with respect to the generation principle. The extensive research on harvesting energy results from body vibration, inertial element, and foot press to convert into electricity is overviewed. Over the past decades, various smart materials have been employed to achieve energy conversion. Generators based on electromagnetic induction or the triboelectric effect were developed and integrated. Small captured power and low overall efficiency are criticized. The concept of human walking energy harvest is extended into the wearable walking robotics using other mediums, such as fluid, to transmit power instead of electricity. By comparison, it is indicated that less energy conversion links are involved in energy regeneration of such applications and expected to guarantee less loss and higher efficiency. Meanwhile, in order to overcome the shortage of relatively low power output, comments are made that the harvester should be capable of adaptation under the condition that the mechanical energy of lower limb and feet is subject to change in different gait phases so as to maximize the collected energy.

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“…It was shown [ 5 , 6 , 7 , 8 , 9 , 10 ] that capacitive electrostatic microgenerators create the highest electric field energy density and, consequently, highest power [ 8 , 9 , 10 , 11 ]. In contrast to classical capacitive generators [ 4 ], electret generator [ 12 ] do not require an external power source; therefore, their design is simple and reliable, and they show the most promise for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Single-Capacitor Electret Impact Microgenerator

2016

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A new type of electrostatic microgenerator is presented that converts mechanical microvibrational energy into electric energy. The energy conversion mechanism is as follows. External microvibrations are transmitted to the device frame. The thin electret layer sputtered to the silicon substrate surface was fixed on the frame and the moving electrode was fixed by a weak suspension and comes into contact with the electret surface under the action of vibrations. A two-stage impact process is described: coming into contact with the spring stop that models the undulation of the contact surfaces, and direct impact on the electret surface. A numerical modeling of the generator operation is performed and analytic estimates of the generated power are obtained. It is shown that the energy generated by this motor is significantly higher than the energy generated by the classical mechanism based on the excitation of the forced vibrations of the moving plate. Experimental measurements of the microgenerator prototype parameters confirm the results of the theoretical modeling.

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Two-Capacitor Electrostatic Microgenerators

Cited by 7 publications

References 29 publications

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

Overview of Human Walking Induced Energy Harvesting Technologies and Its Possibility for Walking Robotics

Single-Capacitor Electret Impact Microgenerator

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