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windman1000
Regular Member

Joined: 21/06/2009
Location: United States
Posts: 91

Posted: 06:10pm 19 Apr 2010

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iv been trying to login here for a while now , kept getting a cookie enable message so now im on the wifes computer to login here.

i posted my newest axfx gen at buildyourownwindturbine.com link

let me know what you think
windman1000

VK4AYQ
Guru

Joined: 02/12/2009
Location: Australia
Posts: 2539

Posted: 02:55am 20 Apr 2010

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Hi Windman

That is one powerful looking turbine and the engineering is very good I look forward to hearing and seeing more of the machine on the forum, I to live in a low wind area and at present doing a VSWT as most of the time I get a 5 mph wind but 12 mph only on storm fronts,I look forward to seeing performance figures.

Keep up the good work and keep us informed as this is a really worthwhile project.

All the best

Bob

Foolin Around

oztules

Guru

Joined: 26/07/2007
Location: Australia
Posts: 1686

Posted: 08:28am 20 Apr 2010

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I agree with Bob,

Nice engineering. Not sure why you decided on this design, but the implementation is very nice.
How many phase is it?

...........oztules

Village idiot...or... just another hack out of his depth

niall1

Senior Member

Joined: 20/11/2008
Location: Ireland
Posts: 331

Posted: 09:05pm 20 Apr 2010

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its interesting , one thing that kind off comes to mind is the use of smaller multiple rotors instead of two very large much thicker ones

my rotors were 400 mm 12mm thick , the friendly man at the machine shop who cut them offered to true up the magnet faces as there was no guarantee the steel plate was perfectly flat to begin with

but he commented after that diameter was the biggest his lathe would take...getting another rotor at this size would have been ok , so if i had the grey matter (which i most certainly dont) to build a three rotor machine it might have been worth dreaming about

maybe spreading the load using two stators would help dissipating some heat if that were to be an issue

its certainly quite a machine .....

...hope you get the log in thing sorted windman Edited by niall1 2010-04-22

niall

GWatPE

Senior Member

Joined: 01/09/2006
Location: Australia
Posts: 2127

Posted: 11:27pm 20 Apr 2010

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Hi windman1000,

You have quoted some power figs, viz. on Eirebyte.

24 volt system
3amps 69.75watts 96rpms 1.3 mph wind ( aprox 0.50 m/s )
15.6 amps 368watts 312 rpm 12mph wind ( aprox 5.50 m/s )

I am surprised at the size of your alternator to get these power levels, at the quoted rpm. I think you have access to tooling and machining resources much beyond my own. You have put considerable effort into this unit. How much time was spent with optimizing and testing prior to building.

I can't help thinking the alternator should be much smaller. Are these very weak magnets? This could explain a lot.

All aside, a great effort, and I am all for the enclosed designs, as my own, in a seaside salt air environment still shows no signs of corrosion on the internal surfaces, even though the outside had started to show surface rust signs.

Gordon.

become more energy aware

windman1000
Regular Member

Joined: 21/06/2009
Location: United States
Posts: 91

Posted: 10:38pm 24 Apr 2010

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ok im back
i deleted my cookies and now i have no problem logging in here.

i have replyed to you guys over at buildyourownwindturbine.com Link
but i will reply back here now too.

windman1000

windman1000
Regular Member

Joined: 21/06/2009
Location: United States
Posts: 91

Posted: 12:15pm 30 Apr 2010

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I went from almost zero wind to gal winds for this area,
so i got to see what my 2 stator wired in wyes could do.

amps are calibrated with a 100 amp meter , rpm is a 100 pulse encoder and it was calibrated on my lathe from 70 to 1700 rpms, the wind encoder is 100 pulse but i have not calibrated it yet but it close.

24 volt system
4.74 amps , 110 watts , 50 rpms , 5.5 mph , 2.5 m/s
28.4 amps , 682 watts , 186 rpms , 35 mph , 16 m/s

i think my blades are starting to stall at around 20 mph 9 m/s
and i see it furl at 25 mph 11.5 m/s

Edited by windman1000 2010-05-01

windman1000
Regular Member

Joined: 21/06/2009
Location: United States
Posts: 91

Posted: 01:45pm 03 May 2010

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i took my wind indicator and mounted it on my truck , with a spare piclog and laptop and drove it around to calibrate wind, i was way off from what you see above here.
i had it set at 20 pulses but ended up with a setting of 30 pulses.

final readings
at 5 mph it read 4.9 mph ,at 10 mph it read 10.2 ,at 15 mph it read 15 mph,at 20 mph it read 20.3 mph,at 25 mph it read 25.5 mph,at 30 mph it read 30 mph.

so i think it was reading 8-10 mph to high before.

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