Ultra-High-Voltage (7-kV) Bidirectional Flyback Converter Used to Drive Capacitive Actuators

Mottet, Raphael; Almanza, Morgan; Pniak, Lucas; Boegli, Alexis; Perriard, Yves

doi:10.1109/tia.2021.3094460

Cited by 9 publications

(2 citation statements)

References 15 publications

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“…The electronics operating DEAs can integrate strategies to recover the energy from the load and reduce losses. 13 If the actuator is not discharged externally, the energy will dissipate through the resistance R d , and the actuator will self discharge. This self discharge of the DEA can be characterized, allowing to explore the possibility of using a conventional planar DEA by inversing its actuation cycle.…”

Section: Dea Modeling and Self Discharge Characterizationmentioning

confidence: 99%

Inversing the actuation cycle of dielectric elastomer actuators for a facial prosthesis

Konstantinidi,

De Menech,

Martinez

et al. 2024

Electroactive Polymer Actuators and Devices (EAPAD) XXVI

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Dielectric Elastomer Actuators (DEAs) are a type of smart material described as compliant capacitors. They show impressive performances as soft actuators, such as a high strain and fast response. Nonetheless, replicating natural muscle function with DEAs has posed a challenge since DEAs exhibit in-plane expansion, whereas natural muscles contract when stimulated. This publication aims to investigate the use of a normal configuration of DEAs to obtain a contractile movement for post paralysis facial reanimation, by inversing its actuation cycle: the voltage applied on the DEA will constantly be on to keep the DEA stretched and will be off when a contraction movement is wanted, for instance for smiling. Several difficulties linked to this solution need to be considered, such as the self-discharge rate of the DEA, linked to the leakage current flowing through the dielectric when a voltage is applied. The leakage current corresponds to a leakage of charge between the two electrodes and is suggested to influence the self-discharge rate but also the dielectric breakdown and the performance of the actuator. As DEAs present a fast self-discharging rate, the charging frequency of DEAs should be determined to avoid unwanted displacement leading to visible facial spasms. DEAs and their self-discharge rate are characterized, to determine the chosen charging frequency and duty cycle for facial reanimation. The goal is to have the minimum discharge between two actuation cycles. A discharge model was proposed and validated experimentally, allowing to determine a chosen frequency of 2 Hz and 50 % duty cycle, leading to a discharge of less than 3 % between two actuation cycles, and thus allows to consume 1.5% less energy over each cycle compared to a continuous actuation.

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Section: Dea Modeling and Self Discharge Characterizationmentioning

confidence: 99%

Inversing the actuation cycle of dielectric elastomer actuators for a facial prosthesis

Konstantinidi,

De Menech,

Martinez

et al. 2024

Electroactive Polymer Actuators and Devices (EAPAD) XXVI

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“…These converters can be divided into two groups: isolated and nonisolated. Some of classical isolated bidirectional converters proposed in the literature are the flyblack converters, [6][7][8] forwardflyback converters, [9][10][11] half-bridge converters, 12,13 full-bridge converters, 14,15 and resonant isolated converters. 16,17 These converters guarantee a galvanic isolation between both sides using a high-frequency transformer or coupled inductor.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional converter based on boost/buck DC‐DC converter for microgrids energy storage systems interface

Nimitti

Andrade

2022

Circuit Theory & Apps

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SummaryIn this paper, a new bidirectional nonisolated DC‐DC (direct current–direct current) converter to interface microgrid energy storage systems is proposed. This converter is based on the classical bidirectional boost/buck converter, the most used converter in microgrids and can operate both in step‐down and step‐up modes. Besides that, this converter presents low number of components, low voltage and current stress on components, simplicity of operation, low current ripple from low‐side power supply, and two different modes of operation: synchronous and asynchronous. In addition, in this paper, the modeling, control, and power losses estimate of the proposed converter are carried out and the performance of the converter in different aspects of the microgrid application is evaluated, such as step load, abrupt power flux change, and transient analysis. A prototype of 1 kW, 144 to 400 V, is developed in the laboratory to validate the theoretical evaluations of the proposed converter. Besides that, the proposed converter is also evaluated under different dynamic condition which illustrates the effectiveness of the converter. Finally, the maximum efficiency obtained is 97.1% for 500 W working in step‐down operation.

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Miniature High Voltage Capacitor Charging Power Module

Kurariya,

Sharma,

Sanadhya

et al. 2024

Lecture Notes in Electrical Engineering

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Ultra-High-Voltage (7-kV) Bidirectional Flyback Converter Used to Drive Capacitive Actuators

Cited by 9 publications

References 15 publications

Inversing the actuation cycle of dielectric elastomer actuators for a facial prosthesis

Inversing the actuation cycle of dielectric elastomer actuators for a facial prosthesis

Bidirectional converter based on boost/buck DC‐DC converter for microgrids energy storage systems interface

Miniature High Voltage Capacitor Charging Power Module

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