alt.energy.renewable

Hi philkryder;

philkryder < @ > wrote:
> "Duane C. Johnson" wrote:
> > Rich Grise wrote:

> > > What does "unwinding" mean, exactly,
> > > in this context?

> > Windings breaking apart due to
> > centrifugal force at high RPMs.

> > > Thanks,
> > > Rich

> > Duane

> interesting - are they wound on a different axis?
> Why are they immune to "centrifugal force"

Generally yes.
1. Generators have wire windings that go from one
end to the other. This exposes the wire to the
most stress at high speeds since the wire is
laid in relatively strait lines from end to end.
The speed can be higher if the windings are
epoxied in place.

2. Electro magnetic alternators have their windings
wound circumstantially. This places the wire in
the least possible stress and capable of much
higher speeds.

3. Permanent magnet alternators have no windings at
all which can obtain the highest speeds. Of
course anything will fly apart if the speed is
to high.

Duane

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