IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia 2018)

359 / 2017-12-11 10:13:11

Charging Speed Optimization of Bidirectional Flyback Converter for High Speed Dielectric Elastomer Actuator

bidirectional flyback converter,GaN device,Dielectric Elastomer Actuator,Charging Speed Optimization

Plenary track > Applications in renewable energy and storage, transportation, industrial drives, and grid power

Dielectric elastomer(DE) has been widely used as actuators in bionic robots. The frequency response of this material can reach to 20kHz1, but the frequency of actuation is still limited by how fast the power supply charges and discharges the electrodes. Bidirectional flyback converter with high efficiency and simply structure is particularly suitable in this application2. In this paper, the impact of several important circuit parameters on charging and discharging speed are discussed. A novel bidirectional flyback converter (12V input and 2500V output) based on traditional flyback circuit with an auxiliary unit is proposed in this paper. The auxiliary unit collects discharge energy and generates higher voltage (up to 80V) on transformer primary side, which can dramatically reduce charge and discharge time. Experimental results verify the prototype can reduce the charging and discharging cycle from 25.8ms to 10.4ms.