The column-R vawt and 3 phase-5 phase pma projects

[vawt]

i have been a member for a while now but never disscussed my projects here, well today i am going to introduce my vawt.
it is a LIFT based vawt, also i have been tesing the pma's and i have built few axial flux to test with.
also in the future i will be building a wider version of the column and the pma will be built specificly to it with the help of a fellow in another forum.

for some of you know me as faroun or sam, on this forum i am called vawt. you are more than welcome to call me Sam.


please take a look at my channel on you tube and tell me waht you think!.

http://www.youtube.com/user/emagnets?feature=mhum#p/u

best regards

sam chamas

[TomW]

She sure puts a wiggle on the platform at speed

Any generation equipment installed?

Seems 99% of the VAWT you tube videos are free running rotors.

Interesting.

Thanks for the share.

Tom

[vawt]

Any generation equipment installed?

i just finished 4 diffrent axial flux pma's.
http://www.youtube.com/watch?v=zDp_fB7iIy4
http://www.youtube.com/watch?v=ZEkQy8eg-CA&feature=mfu_in_order&list=UL
it has been a crazy winter here in the north, so installation is a bit slow.

soon i hope.

regards

sam

[vawt]

3 phase VS 5 phase conclusion
--------------------------------------------------------------------------------
 

bellow is an update to where i am at.
it havs been terrible with snow storms.
things are a bit slow. but moving ahead.

3phase:
1 disc, 24magnets, 10.25"
18coils, 125turns, 18awg,  star config
free spinn= 100rpm=>13.5vdc
under 24vdc light bulb load=> 130rpm=13.5vdc
under 36vdc light bulb load=> 122rpm=13.5vdc
under 48vdc light bulb load=> 115rpm=13.5vdc
@45rpm=1.25amp shorted

5phase:
1 disc, 24magnets, 10.25"
20coils, 100turns, 18awg,  5neutral config
free spinn= 155rpm=>13.5vdc
under 24vdc light bulb load=> 187rpm=13.5vdc
under 36vdc light bulb load=> 182rpm=13.5vdc
under 48vdc light bulb load=> 176rpm=13.5vdc
@85rpm=1.85amp shorted

regards

sam
 

[ghurd]

A 12V battery at about 10.5V?
To me that means it has a 'dead cell'.
It will be easier to make better sense of the numbers with a fully functional battery.
If you are having trouble with making the math understandable, a dead cell makes a big difference.

The rectifier losses are not related to the anode/cathode configuration.
They are related to the type of diode, and the percentage of rated current.
If the loss was less with the individual diodes, they may have less Vf (forward voltage drop) than the bridges.
Your diodes look kind of 'fat' and they could have a lower Vf than the diodes in the bridges, which could account for your measued difference in efficiency.
That kind of thing can be very confusing.
G-

[tecker]

Load it down and you won't see it hit that vibration zone
PVC blades are going to wear you out if they are that long

[vawt]

Load it down and you won't see it hit that vibration zone
PVC blades are going to wear you out if they are that long

huh?!! i am not sure what you are trying to say! the blades are made from
solid wood and coated with resin and each weight around 6.5lb.
true when i load it down it should stay with in the 450rpm i am looking for
in the video #20 i think it reached the 550rpm and that was a mistake on my part.
note: i have shown how i built it all in the previeous videos
regards

sam chamas

[Beaufort]

Is your design self-starting?  Can it go from stopped to full speed in winds around 5-7 mph?

Must say it looks very nice, the proportions are very good too (height vs diameter vs blade size).  It sounds like the speeds are good for direct drive; something the other VAWT's don't seem to understand.  Looking forward to seeing a full power curve.

[vawt]

Is your design self-starting?  Can it go from stopped to full speed in winds around 5-7 mph?

Must say it looks very nice, the proportions are very good too (height vs diameter vs blade size).  It sounds like the speeds are good for direct drive; something the other VAWT's don't seem to understand.  Looking forward to seeing a full power curve.

yep, it starts at 8mph wind speed, i did have an issue woth the smaller one and that is why i went with the wider one and it worked.
i even showed it start at 5mph wind using a savonius on top of it and when the column-r goes on high rpm the savonius disengage using one way baering.
i showhed all that in my videos. it has been a long procces for me and many are waiting for the result.

thanks

sam

[itsandbits]

as a person that flys vawts, I don't know what you mean by not seeming to understand the need for speed for direct drive. I think it is obvious to any person knowledgeable in this area that the speed the magnets pass the wire is a big factor in generating power; not the only one, and it is dealt with in different ways. there are vawts running that put out a good supply of power at 80rpms plus by using the proper configuration of materials. I have also seen large numbers of hawts using gearing for rotor speed; whazza???

Is your design self-starting?  Can it go from stopped to full speed in winds around 5-7 mph?

Must say it looks very nice, the proportions are very good too (height vs diameter vs blade size).  It sounds like the speeds are good for direct drive; something the other VAWT's don't seem to understand.  Looking forward to seeing a full power curve.