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JimBo911

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Joined: 26/03/2009
Location: United States
Posts: 262

Posted: 08:29pm 15 Nov 2009

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Karlj

You might want to recheck the balance of your blades and hub assembly after you rivet your blades on. I know when I changed the blade pitch after balancing I had to re-balance?

Jim

KarlJ

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Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 01:44am 16 Nov 2009

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This should do the trick.

16mm2 cable paid a little over scrap value at $1.20/m or $7 per KG.

Resistance was measured at 0.2Ohms for 100M
thus
I calculate a 6.4% loss at 20A
or 3.2% drop at 10A for my 100m (300') run.
(thanks Cameron for the link to the wire size calculator)

Should be heaps even for the dual stator.

place was called RE-Scrap Australia Pty Ltd
at 130 Dynon Rd West Melbourne,
the guy has heaps of various cable and its new but somehow ended up as scrap.

BTW where I'm having the trouble is where they have been previously bent, need that neat look.

Edited by KarlJ 2009-11-17

Luck favours the well prepared

KarlJ

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Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 07:30am 22 Nov 2009

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IS this re-wire OK?
this is intended as 7x2p delta

still new to this so much easier to diagnose a no-output stator on the ground

Luck favours the well prepared

Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5123

Posted: 08:13am 22 Nov 2009

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That would be a 2X7C ( 2 times 7 coils in series )Delta, we dont use P anymore, causing too much confusion.
http://www.thebackshed.com/windmill/FPRewire.asp
I think its OK, the back wire is a little hard to follow. You'll know as soon as you slip on the hub and try to turn it. Put a meter across each pair of terminals and you should get the same AC readings when you spin by hand.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

KarlJ

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Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 10:14am 22 Nov 2009

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Great tip,
spin the motor over by hand and if no good will behave like its been shorted
I still cant work out why but when I rewired again without being smart, this rewire much uglier but clearer with separate colours and works

Luck favours the well prepared

KarlJ

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Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 10:32am 22 Nov 2009

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Found the one that I just rewired today at a whitegoods repair shop in their trash area! win win! a good clean one
next question is this worth bothering with or destined for the bin?
Cracked stator 1

this stator has some corrosion on the windings and is cracked also

Luck favours the well prepared

brucedownunder2
Guru

Joined: 14/09/2005
Location: Australia
Posts: 1548

Posted: 09:14pm 22 Nov 2009

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The cracks are not a problem,most of them have some cracks.
The coils are a bit of a worry,,check out the resistance of each phase,,if they are the same then it's only surface corrosion ,(from detergent). wash it with some mineral turps ,sponge it dry and check with a magnifing glass,, Now ,if you see bare copper wire , then you might like to unwind that portion ,solder a new length in ,,heatshrink it and , that should be as new again.

Bruce

Bushboy

KarlJ

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Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 11:17pm 22 Nov 2009

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Cheers Bruce i'll give that a run, due to not wanting to wreck a good one, I rounded the poles a little on this one to see if i could without damaging the coils.
if its ok I'll give it a run

Luck favours the well prepared

KarlJ

Guru

Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 05:53am 27 Nov 2009

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Ahh F&P I really had no idea how many millions of these are out there, everytime I go out for a drive I score a couple more.

Stripped the one with corrosion and answer to this is
STUFFED !!
But 1.3KG copper!!!!!
now interestingly enough the scrap rate for insulated copper is about half what it is for good clean copper
thus theoretically if I scrap another 15 of these (at 1hr each to strip mind you) I'll have enough scrap copper to exchange for 200M of 16mm copper cable (insulated) and everyone will be happy......

Today I got my first 60 series and the thinking begins again.......

It doesn't seem obvious at first, perhaps the site needs more data, it tell us the different types of stators out there and the different re-wire options but does not tell us any more.

My thinking is this
60 has more turns than 80 which has more turns than 100.
thus 60 High voltage low amps, low cutin
80 lower voltage more amps and so on

80s in 2x7c in star produces more/less than
60s in 2x7c in delta

.....enlighten me !

Now that I'm getting better at finding them (now have got 6 including the stripped one and the one on the mill.)
I can be a little more picky at the ones i use.

I actually threw away a magnet ring and stripped stator today ....
and to think the first one I found I cherished as gold...Edited by KarlJ 2009-11-28

Luck favours the well prepared

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