1 April 2015 Comparison of bidirectional power electronics with unidirectional topologies using active discharging circuits for feeding DEAP transducer
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Abstract
To enable a continuous operation of a DEAP transducer, the feeding power electronics must provide the capability to charge and discharge the transducer to enable a continuous voltage adjustment. While in case of energy harvesting applications a bidirectional power electronics is mandatory, for actuator applications also unidirectional power electronics with active discharging circuits can be used. Thus, in this contribution a bidirectional flyback-converter is compared to a unidirectional with different discharging circuits. For this purpose, the design of a resistive and an inductive-resistive discharging circuit is proposed, that are connected in parallel to the DEAP and activated when required. Modulation schemes for both discharging circuits are derived that enable a continuous voltage control. Based on realized prototypes of the investigated topologies the different converters are finally compared to each other.
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Thorben Hoffstadt, Jürgen Maas, "Comparison of bidirectional power electronics with unidirectional topologies using active discharging circuits for feeding DEAP transducer", Proc. SPIE 9430, Electroactive Polymer Actuators and Devices (EAPAD) 2015, 943007 (1 April 2015); doi: 10.1117/12.2085120; https://doi.org/10.1117/12.2085120
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