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Description and Efficiency Comparison of Two 25kVA DC/AC Isolation Modules
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| Author(s) |
Daniel Siemaszko; Frédéric Zurkinden; Lukas Fleischli; Irma Villar; Yales R. De Novaes; Alfred Rufer. |
| Abstract |
In the frame of the European project UNIFLEX-PM, two AC/AC converter topologies have been studied and implemented. Both converters, rated for 25 kVA, are isolated by a medium frequency power transformer. The first topology is based on a dual active bridge containing two additional voltage source inverters for the connection of both DC links to the interfaced grids. The second topology is based on a cycloconverter for the connection of the secondary side of the transformer to the grid without a DC link capacitor. Both topologies have an identical primary side so the efficiency study is focussed on the chain link from one DC link to a 25 kW output load. Experimental efficiencies are compared to theoretical expectations. Due to soft-switching operation in the dual active-bridge, the cycloconverter based solution shows a lower efficiency than in the symmetrical topology. |
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| Filename: | Unnamed file |
| Filesize: | 426.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2010-04-07 by System |
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