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.
|Title of host publication||Proceedings of SPIE : Electroactive Polymer Actuators and Devices (EAPAD)|
|Publisher||SPIE - International Society for Optical Engineering|
|Publication status||Published - 2011|
|Event||SPIE Smart Structures/NDE: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring - San Diego, United States|
Duration: 6 Mar 2011 → 10 Mar 2011
|Conference||SPIE Smart Structures/NDE|
|Period||06/03/2011 → 10/03/2011|
- Hysteretic control
- High voltage
- Dielectric Electro Active Polymer
- Piezoelectric Transformer
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.