| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6745858 | Fusion Engineering and Design | 2015 | 6 Pages |
Abstract
A set of 16 in-vessel saddle coils is installed in the ASDEX Upgrade (AUG) nuclear fusion experiment for mitigation of edge localized modes (ELM) and feedback control of resistive wall modes (RWM). The coils were driven by DC current only during previous campaigns. Now, a new inverter system “BUSSARD” (German abbr. for “Bayerischer Umrichter, schnell schaltend für AUGs rasche Drehfelder”, translated: “bavarian fast switching inverter for AUG's fast rotating fields”) is built for the experiment. A four-phase system has been assembled to simultaneously operate up to 4 groups of coils consisting of up to 4 serial-connected coils each. The maximum current is 1.3Â kA with a ripple in the range of 7% and the frequency is variable between DC and approx. 100Â Hz. The switching frequency is variable between approximately 3 and 10Â kHz. As a first application, rotating fields are generated. The system can be enhanced in two stages to 16-phase operation with a bandwidth of 500Â Hz and a 24 phase system with a bandwidth of up to 3Â kHz.
Related Topics
Physical Sciences and Engineering
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Energy Engineering and Power Technology
Authors
Markus Teschke, Nils Arden, Horst Eixenberger, Michael Rott, Wolfgang Suttrop, the ASDEX Upgrade Team the ASDEX Upgrade Team,