A single stage dual active half-bridge single phase solid-state transformer with wide input-range
- 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.
| Author of HS Reutlingen | Ulrich, Burkhard; Ohler, Fabian; Schenzle, Fabian; Walter, Tobias |
|---|---|
| DOI: | https://doi.org/10.1109/APEC48139.2024.10509423 |
| Erschienen in: | APEC : thirty-ninth annual IEEE applied power electronics conference and exposition, 25-29 February 2024, Long Beach, California, proceedings |
| Publisher: | IEEE |
| Place of publication: | Piscataway, NJ |
| Document Type: | Conference proceeding |
| Language: | English |
| Publication year: | 2024 |
| Tag: | dead time modulation; direct ac/ac converter; dual-active half-bridge (DAHB); transformer (SST) |
| Page Number: | 8 |
| First Page: | 493 |
| Last Page: | 500 |
| DDC classes: | 600 Technik |
| Open access?: | Nein |
| Licence (German): |  In Copyright - Urheberrechtlich geschützt |
