Design and analysis of a corona motor with a novel multi-stage structure

Leng, Jiaming; Liu, Zhiwei; Zhang, Xiaoyong; Huang, Dawei; Qi, Mingjing

doi:10.1016/j.elstat.2020.103538

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…This work uses electric brushes instead of the traditional corona effect 28,29 for charge transfer, which substantially improves the performance of electrostatic motors. Corona 30 is a physical phenomenon under high voltage conditions, where a corona zone is formed near the electrode, and the conductor (rotor blade) can be induced to be charged without contact with the electrode.…”

Section: _ +mentioning

confidence: 99%

Sunlight-powered hovering of an ultra-light micro aerial vehicle

2024

Preprint

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The limited flight duration presents a significant obstacle to the widespread application of micro aerial vehicles (MAVs)1-3, especially for ultra-lightweight ones weighing less than 10 grams, generally having a flight endurance of no more than 10 minutes1,4. Sunlight power5-7 is a potential alternative to improve the endurance of ultra-light micro aerial vehicles, but owing to the restricted payload capacity of the vehicle and low lift-to-power efficiency of traditional propulsion systems, previous studies can not achieve untethered flight or sustaining hovering of MAVs powered by natural sunlight 8,9. To address the challenges, here we present a novel electrostatic-driven propulsion system with ultra-low power consumption (137 mW) and high lift-to-power efficiency (30.7 g·W-1) to realize the first sunlight-powered hovering of a micro aerial vehicle (with a total lift-to-power efficiency of 7.4 g·W-1) under natural sunlight conditions (920 W·m-2). The vehicle mainly consists of an electrostatic-driven propulsion system and an ultra-light kilovolt power system, with a total mass of 4.21 g, which is 1/600 of the existing lightest sunlight-powered aerial vehicle capable of hovering6. The sunlight-powered aerial vehicle we present is the first micro aerial vehicle to achieve untethered flight and sustained hovering under natural sunlight conditions (as opposed to artificial light sources 8,10 and wireless radiofrequency11).

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Section: _ +mentioning

confidence: 99%

Sunlight-powered hovering of an ultra-light micro aerial vehicle

2024

Preprint

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“…Among these, the synchronous type showed superior output performance, such as thrust force in the order of a hundred newtons in a linear configuration [ 10 , 14 ]. Compared to other conventional types of electrostatic actuators, such as corona motors [ 22 , 23 ], liquid motors [ 24 ], and electret motors [ 25 , 26 ], the output performance of the synchronous film motors is found to be outstanding, due to their simple and light-weight structure realized by the use of thin sheets, which shows the advantage of utilizing films in electrostatic actuators.…”

Section: Introductionmentioning

confidence: 99%

Slider Sheet Detection in Charge-Induction Electrostatic Film Actuators

Kojima

Yoshimoto

Yamamoto

2023

Sensors

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This work analyzes a built-in slider detection method for a charge-induction type electrostatic film actuator with a high surface-resistance slider. In the detection method, one stator electrode is detached from the parallel driving electrodes and is dedicated to sensing. When a slider with induced charges moves over the sensing electrode, electrostatic induction occurs in the sensing electrode, which causes an electric current. The current is converted to a voltage through a detection resistance, which will be an output of the sensing circuit. This paper provides a framework to analyze the output signal waveform and shows that the waveform consists of two components. One component is caused by driving voltage and appears regardless of the existence of a slider. The other component corresponds to the movement of a slider, which appears only when a slider is moving over the sensing electrode. Therefore, the slider can be detected by monitoring the latter component. The two components generally overlap, which makes the detection of the latter component difficult in some cases. This paper proposes a method to decouple the two components by switching the detection resistance at an appropriate time. These methods are verified using a prototype actuator that has an electrode pitch of 0.6 mm. The actuator was driven with a set of pulse voltages with an amplitude of 1000 V. The experimental results show similar waveforms to the analytical results, verifying the proposed analytical framework. The performance of the sensing method as a proximity sensor was verified in the experiments, and it was confirmed that the slider can be detected when it approaches the sensing electrode within about 3 mm.

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“…The electrostatic force is the fundamental principle for several very distinct forms of actuation currently under study. These include direct interaction with particulate material [17], compression of elastomeric substrates [16,18] and by exploiting corona discharge [19]. There are also other, more direct, applications such as by using charged metal pegs [20] and thin films [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

An Extended Model for Ripple Analysis of 2–4 Phase Resonant Electrostatic Induction Motors

et al. 2021

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Electrostatic motors are promising forms of actuation for future robotic devices. The study of their different implementations should accelerate their adoption. Current models for resonant electrostatic induction motors were found not to be able to properly describe their behavior, namely, with regard to changes with position. This paper reports a new analytical model for these motors, aiming to address this issue. The model is based on identification of all capacitance harmonics, through a simplified method. Using these, equations for different motor parameters, notably, thrust force, were obtained and compared to previous literature. The new equations model position dependent properties, such as force ripple. The outputs of this model were validated through experimentation with a prototype, with the results confirming the new model better describes motor behavior. An analysis into how to decrease this ripple was also discussed and tested. We concluded that the use of a higher number of harmonics resulted in a much more accurate model, capable of adequately characterizing motor outputs with changes in position.

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Design and analysis of a corona motor with a novel multi-stage structure

Cited by 6 publications

References 27 publications

Sunlight-powered hovering of an ultra-light micro aerial vehicle

Sunlight-powered hovering of an ultra-light micro aerial vehicle

Slider Sheet Detection in Charge-Induction Electrostatic Film Actuators

An Extended Model for Ripple Analysis of 2–4 Phase Resonant Electrostatic Induction Motors

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