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MAN B&W Diesel A/S    S60MC-C Project Guide

DMG/CFE Generators Option: 4 85 259

Fig. 4.01 alternative 5, shows the DMG/CFE (Direct Mounted Generator/Constant Frequency Electrical) which is a iow speed generator with its rotor mounted directly on the crankshaft and its stator boited on to the frame box as shown in Figs. 4.08 and 4.09.

The DMG/CFE is separated from the crankcase by a piąte, and a labyrinth stuffing box.

The DMG/CFE system has been developed in coop-eration with the German generator manufacturers Siemens and AEG, but similar types of generators can be supplied by others, e.g. Fuji, Nishishiba and Shinko in Japan.

Forgenerators in the normai output rangę, the mass of the rotor can normaily be carried by the foremost main bearing without exceeding the permissible bearing load (see Fig. 4.09), but this must be checked by the engine manufacturer in each case.

If the permissible load on the foremost main bearing is exceeded, e.g. because atuning wheel is needed, this does not preclude the use of a DMG/CFE.

485 600 100

Statlc f requenc/ converter system

Fig. 4.08: Standard engine, with direct mounted generator (DMG/CFt)

198 18 59

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