Optimal Design and Control of Dual Active Bridge based Converters

Dual active bridge (DAB) isolated DC-DC converters are now widely used in medium and high-power applications such as DC distribution systems, electric vehicle chargers, etc. A design methodology has been developed that minimizes current stress and enables lossless switching. Combined with an optimal switching strategy, the proposed design ensures the best possible efficiency over the entire operating range. Contrary to popular belief, this work shows that it is possible to keep the current stress close to its minimum possible value over variation in voltage gain through proper design. Single-stage DAB based DC-AC converter with an optimal switching strategy has been proposed for Vehicle-to-Grid (V2G). This work won second best prize paper award for the year 2019-2020 on IEEE Transactions on Transportation Electrification.

D. Das and K. Basu, “Optimal Design of a Dual-Active-Bridge DC–DC Converter,” in IEEE Transactions on Industrial Electronics, vol. 68, no. 12, pp. 12034-12045, Dec. 2021, doi: 10.1109/TIE.2020.3044781.

D. Das and K. Basu, “Modulation Strategy to Minimise RMS and Peak Currents in Dual Active Bridge Converter,” 2020 IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2020, pp. 969-974, doi: 10.1109/ECCE44975.2020.9236276.

D. Das, N. Weise, K. Basu, R. Baranwal and N. Mohan, “A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC–DC Converter for V2G Application,” in IEEE Transactions on Transportation Electrification, vol. 5, no. 1, pp. 186-199, March 2019, doi: 10.1109/TTE.2018.2886455.