Wind energy to electric energy - Page 5 - Electronic Circuits Projects Diagrams Free

**Nigel Goodwin** · 30th December 2004, 06:50 AM

Quote:

Originally Posted by williB

does it seem right that with 6V peak to peak pre rectified volts..
that i am only getting about 3.3V no load rectified volts ??

Yes, peak to peak is double the value of peak, so when you rectify it the zero to peak value will only be 3 volts or so.

williB · 30th December 2004, 04:36 PM

i got my magnets today from www.windstuffnow.com

that was quick !!!
man O' man are they strong.!!

williB · 30th December 2004, 05:25 PM

ok after i put just two magnets on a strip of steel..
and passed them over "just one" of the thinner wire armatures ..
i got 2V peak to peak !!!!
that is amazing !!
imagine how much voltage i could get with a magnet on either side of the coil.. like the double rotors of earlier discussion..
that is , an armature set , sandwiched between two rotors with magnets attracting each other..

williB · 30th December 2004, 08:21 PM

this is my current test fixture..
i need a lathe damnit! lol
the smaller silvery magnets are much more powerful than the larger magnets..
With the eight home depot magnets still in place and the eight new Neodymium magnets i just got 10V p-p

williB · 31st December 2004, 06:21 AM

i am pondering the idea of putting some iron core/ laminates in the center each winding , anyone have any thoughts . would it be a good or bad idea ? and why ?
would it be a waste of time or could i get more voltage out of it if i used laminates or would they just interfere with the simplicity of the generator ?

bryan1 · 31st December 2004, 07:12 AM

Eh WilliB,
I'm sure on windstuffnow you can but 10" disc's off them cheap about 10 bucks I think. I'm sure Ed could supply you with a disc you need just take a look.

Cheers Bryan1

williB · 31st December 2004, 04:54 PM

i'm at the point in the design stage where i need more info..
i need to know how much torque the savonios wind generator can produce ..
i am thinking of one the size of a 5 gal bucket..
i need to know if a 3 to 2 gear ratio is to much or if a 1 to 1 is best..
i found a source for sprockets and chains..
https://sdp-si.com/eStore/Direct.asp?CP=Index.htm
i am going to use a chain because
1) low losses involved in transferring power
2) so i dont have to connect the savonius wind generator directly to the top of the rotor..
just thinking out loud so to speak..

williB · 1st January 2005, 08:02 AM

i found a 8 inch plywood saw blade at home depot to use for the rotor ( just gotta grind off the teeth..) $6.95
and i found a 2 gal bucket for the savonius part at the dollar store..

williB · 3rd January 2005, 06:30 AM

another update on the output of the Permenant Magnet Generator project ::
i am now getting 15 V p-p with 7 armatures and 16 mannets spaced as above .. the plan is to use 8 armatures .. Each armature has a resistance of about 0.9 to 1.0 ohms..
the sine wave is sweet , BTW .. the faster it goes the more voltage you get from it..
This is all spinning the rotor by hand , somewhere around 150 RPMs ..

williB · 4th January 2005, 11:19 PM

am i talking to myself here ?
anyway

the first pic is the new rotor built on an 8 inch saw blade.. with the http://www.windstuffnow.com/ magnets mounted sort of where they will end up..
the second pic is the savonius wind generator part with a cd on top for size reference..it is built with a 2 gal bucket
i have another disk like the base to put on top courtesy of home depot , it came from a used spool from the electrical wire section ..
as for bearings , i have two that i can use , i am going to ues fiberglass resin to secure them in place..

williB · 5th January 2005, 03:19 AM

Oh well

the plywood disks arent cutting it.. too heavy
too much mass to react fast enough to a gust of wind..
i'm thinking 1/8" plexyglass would work much better..

williB · 6th January 2005, 02:27 PM

Plexi-glass works much better..

it turns with the air from two 12V pc fans..

williB · 6th January 2005, 04:30 PM

EDIT : just the savonius part turns with the wind from the pc fans i havnt hooked the generator to it yet
i think that i will put the generater underneath after all..

williB · 6th January 2005, 05:11 PM

I havnt mentioned it yet but i plan on using a PIC controller to monitor the rotation speed of the generator and compare it to an Anemometer..
If the generator slows down compared to the speed of the wind meter then i could disconnect the load till it speeds up again..

slodown · 6th January 2005, 07:10 PM

Quote:

Originally Posted by williB

this is my current test fixture..
i need a lathe damnit! lol
the smaller silvery magnets are much more powerful than the larger magnets..
With the eight home depot magnets still in place and the eight new Neodymium magnets i just got 10V p-p

"Still living...not dead yet" :lol: Still reading along, mate. Great work.

You can make a lathe from a hand drill, but I cannot find the link just yet.

*********
found a One for a CNC machine
http://www.pathcom.com/~vhchan/cnc/cnc.html

foam lathe
http://www.dansworkshop.com/Hot%20wi...0cutting.shtml

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30th December 2004, 04:36 PM	(permalink)
williB	i got my magnets today from www.windstuffnow.com that was quick !!! man O' man are they strong.!!

30th December 2004, 05:25 PM	(permalink)
williB	ok after i put just two magnets on a strip of steel.. and passed them over "just one" of the thinner wire armatures .. i got 2V peak to peak !!!! that is amazing !! imagine how much voltage i could get with a magnet on either side of the coil.. like the double rotors of earlier discussion.. that is , an armature set , sandwiched between two rotors with magnets attracting each other..

31st December 2004, 07:12 AM	(permalink)
bryan1	Eh WilliB, I'm sure on windstuffnow you can but 10" disc's off them cheap about 10 bucks I think. I'm sure Ed could supply you with a disc you need just take a look. Cheers Bryan1

31st December 2004, 04:54 PM	(permalink)
williB	i'm at the point in the design stage where i need more info.. i need to know how much torque the savonios wind generator can produce .. i am thinking of one the size of a 5 gal bucket.. i need to know if a 3 to 2 gear ratio is to much or if a 1 to 1 is best.. i found a source for sprockets and chains.. https://sdp-si.com/eStore/Direct.asp?CP=Index.htm i am going to use a chain because 1) low losses involved in transferring power 2) so i dont have to connect the savonius wind generator directly to the top of the rotor.. just thinking out loud so to speak..

1st January 2005, 08:02 AM	(permalink)
williB	i found a 8 inch plywood saw blade at home depot to use for the rotor ( just gotta grind off the teeth..) $6.95 and i found a 2 gal bucket for the savonius part at the dollar store..

3rd January 2005, 06:30 AM	(permalink)
williB	another update on the output of the Permenant Magnet Generator project :: i am now getting 15 V p-p with 7 armatures and 16 mannets spaced as above .. the plan is to use 8 armatures .. Each armature has a resistance of about 0.9 to 1.0 ohms.. the sine wave is sweet , BTW .. the faster it goes the more voltage you get from it.. This is all spinning the rotor by hand , somewhere around 150 RPMs ..

5th January 2005, 03:19 AM	(permalink)
williB	Oh well the plywood disks arent cutting it.. too heavy too much mass to react fast enough to a gust of wind.. i'm thinking 1/8" plexyglass would work much better..

6th January 2005, 02:27 PM	(permalink)
williB	Plexi-glass works much better.. it turns with the air from two 12V pc fans..

6th January 2005, 04:30 PM	(permalink)
williB	EDIT : just the savonius part turns with the wind from the pc fans i havnt hooked the generator to it yet i think that i will put the generater underneath after all..

6th January 2005, 05:11 PM	(permalink)
williB	I havnt mentioned it yet but i plan on using a PIC controller to monitor the rotation speed of the generator and compare it to an Anemometer.. If the generator slows down compared to the speed of the wind meter then i could disconnect the load till it speeds up again..