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coil awg
By blueyonder, Section Mechanical Posted on Sat Aug 2nd, 2008 at 12:31:39 PM MST
size counts

i am very near to building a new stator .
on advice given about wire size . it was said if i used a thicker wire than 14awg
it would be much better.
so the 14 awg was what i already had .
but now i am thinking .i dont have 13awg .
but i do have 16awg .
so can i use two wires in hand at 16awg to give me a more heavy wire.
the advice was given free.
so who am i to not bother and go my own way.
i am pretty set in my mind i can do this . and it will be good to go.
the 16awg is 1.30 mm. or .50 thu.
the amount of turns will stay the same. (i think)
at the moment i am at the coil testing stage
but as yet not set up to test . so will wait a few days more.
this is all making sence to me now. as the coil will have more copper
but the same amount of turns .but two thinner wires rather than one thick one.

Resectioned.

coil awg | 2 comments (2 topical, 0 editorial)

Re: coil awg (3.00 / 0) (#1)
by Flux on Sat Aug 2nd, 2008 at 06:54:18 AM MST
(User Info)

I don't know the whole story here but yes 2 in hand is equivalent to 13. This will have lower resistance than 14 and should be a good move.

If you can keep the same turns you will have the same cut in speed and there can be nothing to loose.

Depending on the matching it may bring you nearer stall and if you have a low line resistance you may have to add a bit of resistance but I can't comment on any of this without whole lots of details.

Similarly I can't comment on the cut in speed without much more detail.

Even if you can't quite get as many turns it may still be beneficial so there should be nothing to loose.

If you can replace 14 with 2 in hand 16 with the same turns it must be good and you weren't using all the space with the 14. ( the space factor of two in hand 16 is probably better than single 13 and that could be to your advantage).

In general it pays to use the thickest wire possible even if it need some external resistance. It is better to get the heat outside the stator.

Ultimately this is all tied up with prop size cut in wind speed and many other factors so the improvement may not be spectacular ( especially if your choice of cut in speed is wrong) but it will give a safer machine for the same out.

Confused now, I bet you are!

Flux

Re: coil awg (3.00 / 0) (#2)
by blueyonder (windwoodgood at yahoo dot co dot uk) on Sat Aug 2nd, 2008 at 04:12:26 PM MST
(User Info)

hi flux. thanks again for the advice.
your last words were . CONFUSED NOW.I BET YOU ARE.

no it is clear as a bell now.
only now i am beginning to understand it all. and thats reading the
reply you have put to others questions.
as well as others who have helped explain things to us who are only learning.

in another post i asked about cut in speed. aprox rpm at prop.
you gave me a good answer . i have worked it out .
not a poor wind. not great winds. so have gone for a 220 rpm at prop.
with a six foot prop 8 mags. 2x1x1/2 n42.
and six coils with about 55 turns of 2 in hand 16awg.

now if i could only get my lathe to turn at 220rpm life would be great.
this mill has gone from one rotor to two rotors.
the stator is now no good.

but i did have a great day today running it with a bench motor.
first at 12volt dc. thats with twin rotors fixed.
with just one rotor it wouldent reach cut in till about 550 rpm(to high)
then again with two batteries for 24 volts.
at 12 volt it was stalling hard.
at 24 much better .
this is a stator i made before .

this stator cant be used for much. as it would need mags.
maybe i can nail it to the wall as a bit art or sumthing.
but it was great fun watching it at work .
i will post a few pics of the work done so far.

thanks again flux.

its a ill wind that dos no good
[ Parent ]

coil awg | 2 comments (2 topical, 0 editorial)

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