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Forum Index : Windmills : magnetic hub work

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brucedownunder2
Guru

Joined: 14/09/2005
Location: Australia
Posts: 1548
Posted: 03:52pm 16 Oct 2006
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Here are a couple pic's of how I replaced the F&P magnetic"tiles" with 192 small narrow Neo magnets 2 end to end and 2 high.

It's a bit tricky getting them to stay put (do it before the bar opens).
I then carefully stick "Gaffa" tape around inside and outside to form a little "Dam".
Polyester resin is then poured . Minor cleaning up after results in a clean job.

This rotor is very powerful and can't be removed if you put it on without the F&P purpose nylon removal nut.Even then it's a hard job to remove.
I found very little cogging ,just some because doing this job in a home workshop surely dosen't align the magnets %100.. The cogging causes a bit of hum when the rotor is spinning ,I'm hoping not too much. I suppose the cogging is less than %10 of what the ceramic arrangement was.

I'll post aome results of it in a couple of days ,if we have any decent wind.




Here you can see the bubbles caused by the polyester resin 's heat during curing.




These are the 192 small neo's 2x end to end and 2x stacked .


Bruce
Bushboy
 
Pt w/field Matt

Senior Member

Joined: 24/02/2006
Location: Australia
Posts: 105
Posted: 05:02pm 16 Oct 2006
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hi bruce nice rotor and i see you took my advice on using apc ups as a cheap 24v pure sine wave inverter i put a fan on the outside of the case for cooling.was down the farm at pt/wakefield for 3 months and a 1400va and 1000va ups did the whole house 400l fridge tv lighting and washing machine. keep up the good work   pt w/field matt
matt down south
 
brucedownunder2
Guru

Joined: 14/09/2005
Location: Australia
Posts: 1548
Posted: 08:29pm 16 Oct 2006
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Hi Matt. Good to hear from you again--wondered where you had gone to --send me an e-mail if you still have my address.
The truck alternator is ready for the Neo's ,so will be contacting you about availability of whatever you think is suitable.
Will post pic's of the truck alternator here later.

Bruce
Bushboy
 
Pt w/field Matt

Senior Member

Joined: 24/02/2006
Location: Australia
Posts: 105
Posted: 09:20am 17 Oct 2006
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hi bruce   you have got the wrong matt,you want matt lines.i live in sa not vic,but on the farm 13 kms off the coast we sure do get plenty of strong winds some days it blows hard all day and night.i cant wait to live there on a permanant basis and make some fp windmills to harness this resouse till then ill use the cheap off peak power to recharge my 1000ah battery bank
matt down south
 
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