The characteristics of diagonally connected subsonic MHD generators operating with and without current control/power shuffle circuits are investigated. The results of the analysis are presented for the 50 MW th CDIF 1B2 generator. It is shown that an axial current flows in the uncontrolled diagonal generator which decreases the generator's performance. Electrode current control circuits can be used as power shufflers to eliminate the axial current and to improve the efficiency. The improved performance efficiency can be maintained to part-load conditions when the inverter, channel, and combustor controls are integrated. Control requirements for generators with midchannel power taps are also discussed.
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