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3 April 2012 Bidirectional power electronics for driving dielectric elastomer transducers
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The operation of Dielectric Elastomer Transducers typically requires high voltages in the kilovolt range and relatively low currents. Therefore, for driving Dielectric Elastomer Transducers a high voltage power electronics is necessary. For realization of energy efficient actuator and generator applications bidirectional switched-mode converter topologies should be used enabling a bidirectional energy transfer as well as a high efficiency. In this contribution a modular converter system consisting of several switched-mode converter modules featuring galvanic isolation is presented as a basic concept for realization of a high voltage power supply. Three converter topologies - bidirectional flyback, Dual Active Bridge and Isolated Bidirectional Full-Bridge converter - are investigated and suitable modulation schemes are presented, which are based on hysteretic current-mode control, enabling a high converter dynamic and limitation of the converter output current in order to prevent electrode damage. Simulation results for the proposed converter topologies are presented and experimental results for a single bidirectional flyback converter module are shown.
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L. Eitzen, C. Graf, and J. Maas "Bidirectional power electronics for driving dielectric elastomer transducers", Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 834018 (3 April 2012);

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