Performance Comparison of Ferrite and Nanocrystalline Cores for Medium-Frequency Transformer of Dual Active Bridge DC-DC Converter
| Autor: | Toshiro Sato, Akekachai Pannawan, Pornnipa Nunocha, Sakda Somkun, Viboon Chunkag, Tawat Suriwong |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Materials science 020209 energy Energy Engineering and Power Technology 02 engineering and technology Medium frequency law.invention ferrite material soft magnetic material nanocrystalline material law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Transformer Engineering (miscellaneous) Saturation (magnetic) Power density Toroid Renewable Energy Sustainability and the Environment business.industry 020208 electrical & electronic engineering dual active bridge DC-DC converters Ferrite core Nanocrystalline material transformer Ferrite (magnet) Optoelectronics business Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 2407, p 2407 (2021) Energies; Volume 14; Issue 9; Pages: 2407 |
| ISSN: | 1996-1073 |
| Popis: | This article reports an investigation into ferrite and nanocrystalline materials for the medium-frequency transformer of a dual active bridge DC-DC converter, which plays a key role in the converter’s efficiency and power density. E65 MnZn ferrite cores and toroidal and cut nanocrystalline cores are selected for the construction of 20-kHz transformers. Transformer performance is evaluated with a 1.1-kW (42–54 V)/400 V dual active bridge DC-DC converter with single-phase shift and extended phase shift modulations. The experimental results indicate that the toroidal nanocrystalline transformer had the best performance with an efficiency range of 98.5–99.2% and power density of 12 W/cm3, whereas the cut-core nanocrystalline transformer had an efficiency range of 98.4–99.1% with a power density of 9 W/cm3, and the ferrite transformer had an efficiency range of 97.6–98.8% with a power density of 6 W/cm3. A small mismatch in the circuit parameters is found to cause saturation in the nanocrystalline toroidal core, due to its high permeability. The analytical and experimental results suggest that cut nanocrystalline cores are suitable for the dual active bridge DC-DC converter transformers with switching frequencies up to 100 kHz. |
| Databáze: | OpenAIRE |
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