Originally Posted by
gordon_s1942
I had a book one time on generators and wiring used on aircraft and in it were what they called 'Motor/Generator' sets.
This was 2 sets of wiring on a single shaft, one end was the 'Motor', the other end the 'generator'.
I dont know if the windings were connected or separate but it made for a fairly compact set.
Also I cant remember now if they were only DC in and out or mixed but I doubt it was AC back then.
My idea of a 'Motor/Generator' set is either a Petrol or Diesel powered engine driving a generator/alternator to produce electricity.
Even now I have a hard time understanding why you would run an electric motor coupled to a generator to produce a different voltage but maybe when the book was written this was the most viable and practicable option available to them.
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