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  4. Control Strategy for the Discharge Phase of an Ultra-High Voltage (>7kV) Bi-Directional Flyback Converter Driving Capacitive Actuators
 
conference paper

Control Strategy for the Discharge Phase of an Ultra-High Voltage (>7kV) Bi-Directional Flyback Converter Driving Capacitive Actuators

Mottet, Raphaël Johannes Charles  
•
Boegli, Alexis  
•
Perriard, Yves  
December 22, 2020
2020 23rd International Conference on Electrical Machines and Systems (ICEMS)
ICEMS 2020 - The 23rd International Conference on Electrical Machines and Systems

Dielectric Elastomer Actuators (DEAs) require ultra high voltages in the order of several kilo volts to operate. To supply such voltages, a DC-DC flyback converter topology was selected. One of the main advantage of using such a structure is the possibility to modify it to work bidirectionally. Meaning that electrical energy can not only flow from the power supply to the actuator, but also from the actuator back to the power supply. This characteristic is of significant importance because of the need to recuperate the electrical energy stored in DEAs to improve the overall efficiency of the system instead of dissipating it as heat. Indeed, due to their capacitive nature, DEAs can store an important amount of energy when fully deformed which needs to be removed to bring the actuator back to its original shape. This paper focuses on the control aspect to remove the stored energy when using a bi-directional flyback converter capable to supply a voltage of up to 7 kV to the load from a 12V power supply. After a brief presentation of the working principle of the discharge procedure, the implemented control strategy is detailed in depth with the presentation of the hardware used and the control algorithm put in place. Experimental results then show that the control strategy works well with an output voltage of up to 7 kV but is nonetheless close to its limits because of increasingly small measuring time spans going down to several micro seconds.

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Type
conference paper
DOI
10.23919/ICEMS50442.2020.9290814
Author(s)
Mottet, Raphaël Johannes Charles  
Boegli, Alexis  
Perriard, Yves  
Date Issued

2020-12-22

Publisher

IEEE

Published in
2020 23rd International Conference on Electrical Machines and Systems (ICEMS)
Total of pages

5

Start page

1326

End page

1330

Subjects

dielectric elastomer actuators

•

flyback converter

•

ultra-high voltage gain

•

high voltage power supply

•

discharge control

Note

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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Event nameEvent placeEvent date
ICEMS 2020 - The 23rd International Conference on Electrical Machines and Systems

Hamamatsu, Japan

November 24-27, 2020

Available on Infoscience
December 14, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/174052
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