Wind energy to electric energy - Page 6 - Electronic Circuits Projects Diagrams Free

williB · 7th January 2005, 12:01 AM

thanks for the links ..
I think that i am going to use one of my 5 1/4 hard drive spindle /motor assemblies for the lathe , i allready used it to fabricate the plexi glass , that and a dremmel , worked pretty well..
the nice thing about using the assembly is that you can bolt it down with three screws , the holes are allready there..
one of hard drive (assemblies) also had a linear slide which could be used as a tool holder with some modifications..

williB · 7th January 2005, 05:04 AM

williB · 8th January 2005, 02:04 AM

another update ::
I just mounted ONE armature , and when i spin it fast , I get 4 Volts p-p !! .. from one armature !!
that works out to 32 V single phase p-p ..Eight armatures at 4 V each.. i wonder if it will turn out that way..
i have the spindle mounted on a very flat board of mahagany and the armature mounted to the board .. the spacing between the magnets and the armatures is less than 0.010 of an inch , which i believe is critical to get maximum voltage ..

williB · 8th January 2005, 02:37 AM

that white paper between the base and everything else is a layout of where to put the armatures..
as you can see i am only using two pieces of threaded rod to mount the armatures that seems for now to be enough..

williB · 8th January 2005, 03:18 AM

neat waveform huh ?
this is from one armature and two magnets , and a light spin . and 1 V/ Div
its amazing how This turns into a sinusoidal wave with evenly spaced magnets and armatures..
the first negetive going pulse is when the armature encounters the first magnet..
the positive spike is when the armature encounters both magnets ..
the second negetive going pulse is when the second magnet leaves the armature..
when you spin it the other way the waveform is inverted.

williB · 9th January 2005, 06:19 AM

These are some pics of today.

williB · 9th January 2005, 06:30 AM

More pics..
The dial indicator came in handy to level out the height of the arms.
But still the one in the back is touching a little bit , GRRRRR ..

williB · 9th January 2005, 05:59 PM

Ok i'm getting at least 30 V p-p no load .
the wave looks similiar to the one above .. just bigger..
hmmm , not really sinusoidal .. i had a nice sine wave before..
oh well .. :roll:
late last night i put the sanonius wind turbine on top of the permenent magnet generator .. and discovered ..I need a BIGGER wind collector..lol
my 2 gal bucket isnt cuttin it..
the reason is , when i put a load on the generator it slows down too much

on the bright side i was able to light a mini mag light bulb with wind power from a fan .. :!:
i hooked it up right to the raw output of the generator it was really cool the way it was frickering ..

williB · 9th January 2005, 08:53 PM

Got some data here
Spinning the generator by hand ( with a pen stuck in one of the holes )
and four 1N 4001 diodes in a bridge rectifer setup..

with no load V = 13-14 V..
with 12 ohms load V= 1.23 v , A = 0.24 A
with 3.3 ohms load V= 0.62v , A = 0.36 A
with 1.3 ohms load V= 0.37v , A = 0.502 A ( just the meter)
spinning it as fast as i could with just the meter i got 0.6 A ..

williB · 9th January 2005, 09:18 PM

I think i am finally able to answer the origional question..
Yes ..
the generator will indeed charge Rechargeable Batteries ( with not too much effort either !!
just hooked two NiMH batteries in series , and as soon as it started turning it started charging them..
Rest voltage on the two batteries = 2.61 V
i was able to get the voltage up to 2.82 V @ 200 mA ..
so yes it can be done..just need a larger wind turbine.

Vaibhav Birit · 10th January 2005, 03:58 AM

Well done,
Nice work, now just do some thinking into how it will spin by natural wind. That will be marvellous.

williB · 10th January 2005, 06:23 AM

Vaibhav glad to see you .. i thought at first that you got hit by the tsunami but after looking at map i saw that you were on the west coast....
i believe that it WILL charge , by natural wind , because as soon as it started spinning , it started charging ..so even at very slow speed it will charge.. ..maybe you (or i ) would be better off with the propeller type ..
although i really dont have the room for a 8 to 10 foot dia. propeller blade..

williB · 10th January 2005, 08:55 PM

things that i would like to try next ..
1) make the armatures smaller , i origionally designed them for the much larger Home Depot Magnets .. i figure a little bit thinner , and not as wide , about as wide as the magnets 1/2 " would be better.. and i can shave 1/2 " off the length.. this will give me more area for the flux to cut through.. also i found a chunk of laminate that i can use to check to see if it would work better than no laminate..
2) although the saw blade works very well it unfortunatly does flex a little bit , a few thousandths of an inch , if the 10" diameter one is thicker that would be a better choice..

williB · 12th January 2005, 06:00 AM

i found this interresting concept, while looking around ..

http://www.speakerfactory.net/wind.htm
http://www.speakerfactory.net/wind954c.jpg

Doug produces these in much larger versions up to 6 KW , Wow !!

This caption is under the picture.
"The car headlight at Doug's feet is 50 watts The rotor size is only fourteen inches! Wind speed in the 20's mph (more rotors produce more power)"

williB · 12th January 2005, 09:49 PM

The 5 gallon bucket i tried actually works :lol: ..
It is charging two 1.2 V NiMH Batteries at this moment..

I have also been experimenting with a savonius shroud which funnels the incomming wind into the cup part of the collector and blocks the wind from the convex part of the collector..

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7th January 2005, 12:01 AM	(permalink)
williB	thanks for the links .. I think that i am going to use one of my 5 1/4 hard drive spindle /motor assemblies for the lathe , i allready used it to fabricate the plexi glass , that and a dremmel , worked pretty well.. the nice thing about using the assembly is that you can bolt it down with three screws , the holes are allready there.. one of hard drive (assemblies) also had a linear slide which could be used as a tool holder with some modifications..

8th January 2005, 02:04 AM	(permalink)
williB	another update :: I just mounted ONE armature , and when i spin it fast , I get 4 Volts p-p !! .. from one armature !! that works out to 32 V single phase p-p ..Eight armatures at 4 V each.. i wonder if it will turn out that way.. i have the spindle mounted on a very flat board of mahagany and the armature mounted to the board .. the spacing between the magnets and the armatures is less than 0.010 of an inch , which i believe is critical to get maximum voltage ..

9th January 2005, 05:59 PM	(permalink)
williB	Ok i'm getting at least 30 V p-p no load . the wave looks similiar to the one above .. just bigger.. hmmm , not really sinusoidal .. i had a nice sine wave before.. oh well .. :roll: late last night i put the sanonius wind turbine on top of the permenent magnet generator .. and discovered ..I need a BIGGER wind collector..lol my 2 gal bucket isnt cuttin it.. the reason is , when i put a load on the generator it slows down too much on the bright side i was able to light a mini mag light bulb with wind power from a fan .. :!: i hooked it up right to the raw output of the generator it was really cool the way it was frickering ..

9th January 2005, 08:53 PM	(permalink)
williB	Got some data here Spinning the generator by hand ( with a pen stuck in one of the holes ) and four 1N 4001 diodes in a bridge rectifer setup.. with no load V = 13-14 V.. with 12 ohms load V= 1.23 v , A = 0.24 A with 3.3 ohms load V= 0.62v , A = 0.36 A with 1.3 ohms load V= 0.37v , A = 0.502 A ( just the meter) spinning it as fast as i could with just the meter i got 0.6 A ..

9th January 2005, 09:18 PM	(permalink)
williB	I think i am finally able to answer the origional question.. Yes .. the generator will indeed charge Rechargeable Batteries ( with not too much effort either !! just hooked two NiMH batteries in series , and as soon as it started turning it started charging them.. Rest voltage on the two batteries = 2.61 V i was able to get the voltage up to 2.82 V @ 200 mA .. so yes it can be done..just need a larger wind turbine.

10th January 2005, 03:58 AM	(permalink)
Vaibhav Birit	Well done, Nice work, now just do some thinking into how it will spin by natural wind. That will be marvellous. __________________ www.vaibhavbirit.bravehost.com

10th January 2005, 06:23 AM	(permalink)
williB	Vaibhav glad to see you .. i thought at first that you got hit by the tsunami but after looking at map i saw that you were on the west coast.... i believe that it WILL charge , by natural wind , because as soon as it started spinning , it started charging ..so even at very slow speed it will charge.. ..maybe you (or i ) would be better off with the propeller type .. although i really dont have the room for a 8 to 10 foot dia. propeller blade..

10th January 2005, 08:55 PM	(permalink)
williB	things that i would like to try next .. 1) make the armatures smaller , i origionally designed them for the much larger Home Depot Magnets .. i figure a little bit thinner , and not as wide , about as wide as the magnets 1/2 " would be better.. and i can shave 1/2 " off the length.. this will give me more area for the flux to cut through.. also i found a chunk of laminate that i can use to check to see if it would work better than no laminate.. 2) although the saw blade works very well it unfortunatly does flex a little bit , a few thousandths of an inch , if the 10" diameter one is thicker that would be a better choice..

12th January 2005, 09:49 PM	(permalink)
williB	The 5 gallon bucket i tried actually works :lol: .. It is charging two 1.2 V NiMH Batteries at this moment.. I have also been experimenting with a savonius shroud which funnels the incomming wind into the cup part of the collector and blocks the wind from the convex part of the collector..