Maybe this is a language thing - in English, a dynamo is specifically a DC generator
Most foreigners - I think - are not aware of this. In the German language the term Dynamo
is nearly exclusively used for the thing at bicycles.
In a more technical slang Dynamo
would actually describe an AC generator, in contrast to Gleichstrommaschine
which is explicitely DC (=Gleichstrom
). In English it is vice versa: 'dynamo' is DC and 'alternator' is AC...
The term 'generator' is - in both languages - used unspecifically.