TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Ulrich, Burkhard
A1  - Ohler, Fabian
A1  - Schenzle, Fabian
A1  - Walter, Tobias
T1  - A single stage dual active half-bridge single phase solid-state transformer with wide input-range
T2  - APEC : thirty-ninth annual IEEE applied power electronics conference and exposition, 25-29 February 2024, Long Beach, California, proceedings
N2  - This article proposes a single-phase solid-state transformer with a wide input range. The converter is based on a direct ac/ac dual-active half-bridge topology utilizing four-quadrant switches. A two-mode control concept, combining a phase-shift modulation with a new variable dead time modulation, is proposed to control the output voltage over a varying input voltage and load range. Due to the presented variable dead time modulation concept, the step-down capability can be expanded. Combining the control principle with the topology leads to a very low-complexity system design. The converter structure and operating principle are described and analyzed in detail. Simulation results and measurements on a 600 W prototype, using SiC cascode FETs switching at 250 kHz, with an ac input voltage varying from 120 V to 400 V, verify the proposed concept.
KW  - dead time modulation
KW  - transformer (SST)
KW  - dual-active half-bridge (DAHB)
KW  - direct ac/ac converter
Y1  - 2024
U6  - https://doi.org/10.1109/APEC48139.2024.10509423
DO  - https://doi.org/10.1109/APEC48139.2024.10509423
SP  - 493
EP  - 500
S1  - 8
PB  - IEEE
CY  - Piscataway, NJ
ER  -