Carlos Marcano wrote:
>> No, it wasn't missed since it wasn't relevant to the discussion.  The
>> output
>> voltage is a function of the excitation field strength, but has no
>> bearing on the speed of a unloaded generator.
>
> Yes it does. Increasing RPM will raise the terminal voltage of the
> unloaded generator.

You are confusing cause and effect.  The output voltage is a function of th=
e
speed and exitation current.  Voltage is roughly caused by speed times
exitation current.  However, for a unloaded generator this does not feed
back to different load on the shaft since the load is zero by definition of
"unloaded".

Generators aren't perfect, so there will be some friction losses, eddy
current losses, etc.  Some of these will be effected by the exitation field
strength, but not much.  If a generator is 90% efficient, then these effect=
s
are only issues to the 10% inefficient part.


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