directly on the stator disk.
These drafts are made for six magnets
and this method will have six coils
in one phase. The number of the magnets
is the same as the number of the coils
with these drafts.
(You can as well make the number
of coils different of the number
of the magnets.)
The same method will of course work
for any number of magnets.
First a picture of the method how to make the
coils of the wire. I got the idea
by reading about 'WindstuffEd''s generators.
So all the coils of a phase can be made
of one single wire piece. In practice
it is maybe often good to put many thin
wires in parallel instead of using one
thick wire, because it is easier to bend
a few thin wires than a single thick wires.
To make it three phase we need to have
two other phases 20 degrees from
the first one and from each other.
This will give 120 degrees phase difference.
For making these coils on the stator
I think that it is good to make
the stator disk so that the place where
the coils will reside is thicker than
the center part of the stator. Then the
loops outside the area of the magnets
will have room to make the stator flat.
For the wires it is good to make slots
or another possibility is maybe to use
some kind of tubes where to put the coils?
One more picture of the first phase.
One advantage of this method is that
you can get quite easily three overlaid
phases without making
the stator unnecessary thick?
You can get lots of wires
on the stator so that the
alternator can be made
with low RPM.
For the stator one good material is
industrial formica, good quality
plywood can also be used.
This method will suit to air core
stators and for stators with
laminates, too.
One disadvantage with this plan is maybe,
that when the coil number of one phase
is the same as the number of the magnets
the alternator might vibrate more than
such an alternator, which has got
different number of the coils from
the number of the magnets?
- Hannu
