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Development of slimline high voltage supply electronics for the dielectric elastomer actuators

Prabhu, Sriram K. (2012):
Development of slimline high voltage supply electronics for the dielectric elastomer actuators.
Darmstadt, TU Darmstadt Institut EMK / MEMS, [Master Thesis]

Abstract

Dielectric elastomer actuators requires a high voltage drive electronics. Power supplies for DEAs should be capable of providing a high voltage AC and DC signal at low power levels. In laboratory environment, it is required to have a supply electronics capable of providing a range of voltage and frequency for testing. Further, due to the nonlinear characteristics of DEA a programmable drive capable of controlling the force output according to a feedback provided is desired. In this thesis, the requirements of drive for DEA is systematically analysed. A survey of available drive electronics for other similar applications is done to get an idea of possible technologies that can be used. A prototype drive electronics is designed and realised. The driving electronics generates a maximum DC voltage of 800 V. The AC signal can be amplified upto 500 V peak. The input to the system is 15 V DC. The DC voltage is converted to high voltage using converter from PICO Electronics. The AC signal amplification module consists of a low voltage H bridge which provides a high frequency switching signal to the transformer. The high voltage transformer output is rectified using a diode full bridge converter and then converted to an alternating signal by modulating the control signal. The DC and AC signals are coupled at the output. The microcontroller Atmega128 is used to control the electronics. The output force can be controlled by providing a feedback to the microcontroller. In the software the Taylor�s series expansion to generate an inverse square function is implemented. This provides an open loop nonlinear control solution for DEAs.

Item Type: Master Thesis
Erschienen: 2012
Creators: Prabhu, Sriram K.
Title: Development of slimline high voltage supply electronics for the dielectric elastomer actuators
Language: English
Abstract:

Dielectric elastomer actuators requires a high voltage drive electronics. Power supplies for DEAs should be capable of providing a high voltage AC and DC signal at low power levels. In laboratory environment, it is required to have a supply electronics capable of providing a range of voltage and frequency for testing. Further, due to the nonlinear characteristics of DEA a programmable drive capable of controlling the force output according to a feedback provided is desired. In this thesis, the requirements of drive for DEA is systematically analysed. A survey of available drive electronics for other similar applications is done to get an idea of possible technologies that can be used. A prototype drive electronics is designed and realised. The driving electronics generates a maximum DC voltage of 800 V. The AC signal can be amplified upto 500 V peak. The input to the system is 15 V DC. The DC voltage is converted to high voltage using converter from PICO Electronics. The AC signal amplification module consists of a low voltage H bridge which provides a high frequency switching signal to the transformer. The high voltage transformer output is rectified using a diode full bridge converter and then converted to an alternating signal by modulating the control signal. The DC and AC signals are coupled at the output. The microcontroller Atmega128 is used to control the electronics. The output force can be controlled by providing a feedback to the microcontroller. In the software the Taylor�s series expansion to generate an inverse square function is implemented. This provides an open loop nonlinear control solution for DEAs.

Place of Publication: Darmstadt
Uncontrolled Keywords: Mikro- und Feinwerktechnik Elektromechanische Konstruktionen
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design > Microtechnology and Electromechanical Systems
Date Deposited: 13 Jul 2012 07:19
Additional Information:

EMK-spezifische Daten:

Lagerort Dokument:Archiv EMK, Kontakt über Sekretariate Bibliotheks-Siegel: 17/24 EMKM1798

Beginn Datum: 05-12-2011

Ende Datum: 04-06-2012

Identification Number: 17/24 EMK M1798
Referees: Schlaak, Prof. Dr. Helmut F.
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