Thummala, Prasanth1; Zhang, Zhe1; Andersen, Michael A. E.1; Maksimovic, Dragan3
1 Department of Electrical Engineering, Technical University of Denmark2 Electronics, Department of Electrical Engineering, Technical University of Denmark3 University of Colorado at Boulder
This paper presents a digital control technique toachieve valley switching in a bidirectional flyback converterused to drive a dielectric electro active polymer basedincremental actuator. The incremental actuator consists ofthree electrically isolated, mechanically connected capacitiveactuators. The incremental actuator requires three highvoltage (~2.5 kV) bidirectional DC-DC converters, toaccomplish the incremental motion by charging anddischarging the capacitive actuators. The bidirectional flybackconverter employs a digital controller to improve efficiencyand charge/discharge speed using the valley switchingtechnique during both charge and discharge processes, withoutthe need to sense signals on the output high-voltage side.Experimental results verifying the bidirectional operation of asingle high voltage flyback converter are presented, using afilm capacitor as the load. Energy efficiency measurements are provided.
Proceedings of Ieee Ecce Usa 2014, 2014, p. 3435-3442
Main Research Area:
IEEE Energy Conversion Congress and Exposition 2014