Bi-Directional Piezoelectric Transformer Based Converter Driving Dielectric Electro Active Polymer Actuators
Noliac A/S, Kvistgaard, Denmark
The dielectric electro active polymer (DEAP) technology has some unique features in terms of flexibility and dynamics, it has a high potential in various applications and in achieving a lower production cost. However it has the drawback of requiring a very high operational voltage, as well of having a relative low electromechanical coupling. In this paper a piezoelectric transformer based DEAP actuator driver is presented, which not only is capable of generating high voltages, but also incorporates a bi-directional power stage that will provide better system efficiency. Due to the low electromechanical coupling, only a small fraction of the supplied electrical energy is converted to mechanical energy. The bi-directional power stage enables the recovery of the electrical stored energy in the actuator, improving the system efficiency significantly. The main achievements of this work are the demonstration of bi-directional functionality and energy recovery, as well as an evaluation of the efficiency.
ACTUATOR 2014 Manuscript B3.1
Publication date: 08/04/2015
Manuscript B3.1 published in Conference Proceedings ACTUATOR 2014
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