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#Post#: 1460--------------------------------------------------
Re: Seagull DIY Discussion
By: burnit0017 Date: February 7, 2014, 7:25 pm
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Hi, do not forget the relationship between wind speed and the
VAWT size. A good strategy is make more than one and run them
in parallel.
#Post#: 1463--------------------------------------------------
Re: Seagull DIY Discussion
By: burnit0017 Date: February 8, 2014, 7:54 am
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Hi, drag styles VAWTs are slow, you would need a PMA that has a
high output at a low RPM.
#Post#: 1464--------------------------------------------------
Re: Seagull DIY Discussion
By: sut Date: February 8, 2014, 8:17 am
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Humm the reason I asked is if you look at some of lynx windmill
(gull 40 ) he has 16 magnets on his plate, I don't know how
many coils he uses but just thinking I could get more power out
of this little 3 coil 6 magnet windmill by placing 6 more
magnets on the plate
I am using neodymium magnets on a 1/4 inch plate I have 6 more
neo magnets from a 3 phase alt I made (first try ) that was not
a success!I must of had one of the coils upside down or
something not wired correctly.
When my windmill is turning slow I notice a bump in volts
about every second then it drops back to almost 0 then back up
so I figured if I filled the space in between magnets that
would smooth things out. I am sure there is a formula for
figuring this out but I have 2 things working against me 1. math
2 electronics! both areas are my week spot
#Post#: 1466--------------------------------------------------
Re: Seagull DIY Discussion
By: burnit0017 Date: February 8, 2014, 8:36 am
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HTML http://www.6pie.com/faradayslaw.php
Hi sut , try this site. All the info you need. The bottom of the
page is the site directory. I hope this helps.
#Post#: 1468--------------------------------------------------
Re: Seagull DIY Discussion
By: burnit0017 Date: February 8, 2014, 8:59 am
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hi, thanks for posting
#Post#: 1470--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: February 8, 2014, 9:45 am
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To test if a stator is wired wrong (which unfortunately is all
too easy) you can place three simple refrigerator magnets on the
stator (for a three coil stator). Apply 3-6 volts DC (lantern
battery) to the leadouts of the alternator. All three N or S
facing magnets should center on the coils with a quick shot of
DC. If a coil is wired backwards from the other three, one
magnet will push away or flip over.
The single phase alternator should have all coils wired in
series in the same orientation.
When the magnets rotate past the coil legs they will induce a
current to flow. This causes high spikes of voltage in a sine
wave (AC). If one coil is wired backwards voltage will be much
lower and the alternator will be easier to turn against a load.
Under load these alternators sound like distant motorcycles
purring.
If you want a stronger alternator you can build a 4-9 coil alt
and use 8-18 magnets. The Gull alternators use 9 coils and 18
magnets. The Seagull design is an introductory budget design.
It relies on far more turns, higher rpm and fewer magnets. To
get power the blades are a bit taller than the diameter.
Smaller diameter gives higher rpms.
#Post#: 1471--------------------------------------------------
Re: Seagull DIY Discussion
By: sut Date: February 8, 2014, 10:23 am
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@CG well its hard to count but it looks like 4 or 5 bumps per
revolution and I am read it it on an analog meter on ac one
lead of meter to each leg of alt
@LW I used that test to make sure I had it wired correctly
before I poured the stator! glad to have done that ! I suppose I
should be trying to get it to spin more (higher in air or better
location ) to get more wind . I need to change my bolt in the
magnet plate to take up some slop (thicker bolt ) so I can get
magnets closer to the stator with out magnets hitting stator .
#Post#: 1473--------------------------------------------------
Re: Seagull DIY Discussion
By: sut Date: February 8, 2014, 4:56 pm
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LOL Glad you made that remark ! and not me! But I am afraid
you hit it right on the head (no DR can help me ) I don't get
enough wind here to make this thing spin enough . Most days when
I go outside and I see the leaves on my beach nut tree rustling
and go over to it and help it get going it will spin for the
longest time and put out about 3 volts so I know its working
like it should .I just am thinking out loud and planing my next
move to make it better (top secret plan )
#Post#: 1478--------------------------------------------------
Re: Seagull DIY Discussion
By: sut Date: February 8, 2014, 6:57 pm
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yes i agree I should but it will have to wait till spring ,I
don't have boots tall enough to get me through the snow ! or the
horse power lol
#Post#: 1517--------------------------------------------------
Re: Seagull DIY Discussion
By: lynx wind Date: February 13, 2014, 3:42 pm
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Looks good. Those shiny aluminum blades are cool looking. A
nice balance will pay off. Are these blades filled with foam?
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