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

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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
CountryUnited States
CitySan Diego
Period06/03/201110/03/2011

Keywords

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

Cite this

Andersen, T., Rødgaard, M. S., Thomsen, O. C., & Andersen, M. A. E. (2011). Low voltage driven dielectric electro active polymer actuator with integrated piezoelectric transformer based driver. In Proceedings of SPIE: Electroactive Polymer Actuators and Devices (EAPAD) (Vol. 7976, pp. 7976-95). SPIE - International Society for Optical Engineering.