Low voltage driven dielectric electro active polymer actuator with integrated piezoelectric transformer based driver

Thomas Andersen, Martin Schøler Rødgaard, Ole Cornelius Thomsen, Michael A. E. Andersen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    Abstract

    Today’s Dielectric Electro Active Polymer (DEAP) actuators utilize high voltage (HV) in the range of kilo volts to fully stress the actuator. The requirement of HV is a drawback for the general use in the industry due to safety concerns and HV regulations. In order to avoid the HV interface to DEAP actuators, a low voltage solution is developed by integrating the driver electronic into a 110 mm tall cylindrical coreless Push InLastor actuator. To decrease the size of the driver, a piezoelectric transformer (PT) based solution is utilized. The PT is essentially an improved Rosen type PT with interleaved sections. Furthermore, the PT is optimized for an input voltage of 24 V with a gain high enough to achieve a DEAP voltage of 2.5 kV. The PT is simulated and verified through measurements on a working prototype. With the adapted hysteretic based control system; output voltage wave forms of both impulse response and sinusoidal shapes up to 2.5 kV are demonstrated. The control system, together with a carefully designed HV output stage, contributes to low power consumption at a static DEAP force. The HV stage consists of a HV measurement circuit and a triple diode voltage doubler optimized for low leakage current drawn from the DEAP. As a result, a 95 mm x 13 mm x 7 mm driver is integrated in a 110 mm x 32 mm actuator, forming a low voltage interfaced DEAP actuator.
    Original languageEnglish
    Title of host publicationProceedings of SPIE : Electroactive Polymer Actuators and Devices (EAPAD)
    Volume7976
    PublisherSPIE - International Society for Optical Engineering
    Publication date2011
    Pages7976-95
    Publication statusPublished - 2011
    EventSPIE Smart Structures/NDE: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring - San Diego, United States
    Duration: 6 Mar 201110 Mar 2011

    Conference

    ConferenceSPIE Smart Structures/NDE
    Country/TerritoryUnited States
    CitySan Diego
    Period06/03/201110/03/2011

    Keywords

    • PolyPower
    • Integrate
    • Hysteretic control
    • Actuator
    • High voltage
    • Dielectric Electro Active Polymer
    • Converter
    • Piezoelectric Transformer

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