Wind energy to electric energy - Page 7 - Electronic Circuits Projects Diagrams Free

williB · 13th January 2005, 03:06 AM

well here it is with the used 5 gal bucket.. You might not be able to see but i have the armatures connected with alligater clips , i suppose i should solder them..
the bucket is connected to the plexiglass with a screw ,as seen in the second picture , i still have to put a bead of hot glue around the bottom of the bucket..
the 5 gal. bucket is connected to the home depot saw blade..
under the blade is the magnets , then the armatures , then the base..

williB · 13th January 2005, 08:24 AM

It seems to have a maximum speed of 128 RPMs .. because i have a three speed fan and the speed of it doesnt change much from low to high under no load conditions..If i gear it down by half , of course i would have to change alot.. but if i do gear it down by half then i could maybe get 64 RPMs out of it.. i guess i just need more power , if i had a lot more power then i could gear it up instead of down..
Also i've had to lower the armatures on the base , away from the magnets because the rotor flexes at high speed..

maybe if i use an automobile brake rotor then i could keep the magnets as close to the armatures as i want .. then i could put another set of magnets on top and another set of armetures on top of that...if i only had more torque.

Vaibhav Birit · 13th January 2005, 09:35 AM

Quote:

Originally Posted by williB

i found this interresting concept, while looking around ..

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

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)"

This is also very interesting. Here all the propellors are driving one common shaft. and power output is wholesome.

williB · 16th January 2005, 02:40 AM

ya its awesome too :wink: tommorrow i am going to finish hooking the generator to a bicycle sprocket set to find out how much power it can produce .
i've allready lit an 1157 auto taillight bulb with it..!
it wasnt at full brightness yet , but it was glowing pretty good, which was amazing for something that I built..
As you can see i have not put a handle on it yet , nor have i mounted the larger sprocket..
but i figure with the 2:1 ratio i should be able to get a lot more power from it, maybe even light the bulb to full brightness..
spinning it by hand is fairly easy even when powering the light bulb , in fact i cant physically spin it any faster, not because of the torque required but it gets to a point where you just cant spin it any faster.. Hence the 2:1 sprocket setup..

williB · 16th January 2005, 07:22 PM

All i can say is WOW !!
here are the stats
peak no load voltage was 35 V , i couldent get the whole peak to peak wave on the scope !! my max is 5V per division..therefore i was getting 70 V peak to peak AC ..
i noticed that once the bulb started to light it got easier to crank, as i would expect..because as it heats up the resistance goes up therefore making it easier to turn..
loaded voltage & current :
through the 1157 bulb .. 15 v Peak @ 337mA .. I guess it wasnt at full brightness , but it got pretty bright..

williB · 18th January 2005, 05:40 AM

I just increased the current by adding a laminated steel ring around the inside ..I wish the rotor/saw blade didnt bend , but it does , very dissapointing.. i have a auto brake rotor :wink: around here somewhere ?? that is what they use on the otherpower site ..
i just got over 340 mA without the gearing

a nice improvement..tomorrow i will test it , with the gears..

williB · 18th January 2005, 02:37 PM

ok i just connected the generator directly to an Ammeter with 0.7 ohms resistance..
Said meter was reading 1200mA max !! Yes over an Amp !! wow

**Nigel Goodwin** · 18th January 2005, 04:02 PM

Quote:

Originally Posted by williB

ok i just connected the generator directly to an Ammeter with 0.7 ohms resistance..
Said meter was reading 1200mA max !! Yes over an Amp !! wow

You will get maximum voltage with no load, and maximum current directly into a meter (like you just have).

The trick now is to find the optimum point that provides maximum POWER, which will be the most efficient use of the generator.

BTW, interesting thread - I know there's not many replies to it (nor any needed), but I enjoy reading how you are getting on!.

williB · 18th January 2005, 04:22 PM

thanks !!

i forgot to add that i it was 0.61 V at 1100 mA ..
hmm only 0.671 Watts .. the amount of energy i was putting into it , i was hoping that it was more.. i could only keep it over an amp for about 30 seconds..

williB · 18th January 2005, 06:27 PM

great suggestion Nigel !!
stats ::

Code:

ohms      Volts  Amps   Power
1         1.26  1.22     1.533 W
6         5.4   0.92     4.97  W
10        7.7   0.7      5.39   W
11        8.03  0.799    6.42  W

williB · 19th January 2005, 06:17 AM

that ring under the armatures is the laminated steel strips i was talking about , seperated by paper.
Does anyone know if it would work better if i segmented them , one for each armeture?
oh i was testing the generator with a 31 ohm resistor , i think the chain came off and pulled one of the rotor mounts out of the wood base.. or the mount came out of the base then the chain came off..
but its fixed now

..
that hole to the left of the arms is where i mounted the larger sprocket.. i would have loved to put some steel strips in the center of each arm , but that puts too much stress on the rotor blade and pulls the magnets into the arms..

jrz126 · 19th January 2005, 12:07 PM

Looks pretty interesting. If I didnt have so many other projects that I'm working on, I'd think about giving that a try.

Like Nigel said, it's pretty interesting to see your progress.

oh yeah and congrats on your 100'th post in this thread

williB · 20th January 2005, 05:10 AM

this time i measured the test resistance , including the ammeter..
according to the graph , somewhere between 13 & 14.7 ohms is where i will get maximum power ..

Although i am not sure why ??
Maybe somone familiar with power generation can answer..??
i would have thought that a resistance equal the source's internal resistance would yeald maximum power ..
the resistance of all the armatures together is 1.9 to 2.0 ohms...
All eight arms are connected in series , since each magnet pair, passes over an armeture at the same time..
it must have something to do with the diode bridge ..

the second pic is the current setup with a door knob mounted for easier turning..

FRIED · 20th January 2005, 07:40 AM

Go here:http://www.fp.co.nz/ and ask them about smart drive motors. They already do what you want.

**Nigel Goodwin** · 20th January 2005, 09:07 AM

Quote:

Originally Posted by williB

this time i measured the test resistance , including the ammeter..
according to the graph , somewhere between 13 & 14.7 ohms is where i will get maximum power ..

Although i am not sure why ??
Maybe somone familiar with power generation can answer..??
i would have thought that a resistance equal the source's internal resistance would yeald maximum power ..
the resistance of all the armatures together is 1.9 to 2.0 ohms...

The generator outputs AC, so it's probably it's impedance which is about 14 ohms (impedance of a coil will be higher than it's DC resistance).

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13th January 2005, 08:24 AM	(permalink)
williB	It seems to have a maximum speed of 128 RPMs .. because i have a three speed fan and the speed of it doesnt change much from low to high under no load conditions..If i gear it down by half , of course i would have to change alot.. but if i do gear it down by half then i could maybe get 64 RPMs out of it.. i guess i just need more power , if i had a lot more power then i could gear it up instead of down.. Also i've had to lower the armatures on the base , away from the magnets because the rotor flexes at high speed.. maybe if i use an automobile brake rotor then i could keep the magnets as close to the armatures as i want .. then i could put another set of magnets on top and another set of armetures on top of that...if i only had more torque.

16th January 2005, 07:22 PM	(permalink)
williB	All i can say is WOW !! here are the stats peak no load voltage was 35 V , i couldent get the whole peak to peak wave on the scope !! my max is 5V per division..therefore i was getting 70 V peak to peak AC .. i noticed that once the bulb started to light it got easier to crank, as i would expect..because as it heats up the resistance goes up therefore making it easier to turn.. loaded voltage & current : through the 1157 bulb .. 15 v Peak @ 337mA .. I guess it wasnt at full brightness , but it got pretty bright..

18th January 2005, 05:40 AM	(permalink)
williB	I just increased the current by adding a laminated steel ring around the inside ..I wish the rotor/saw blade didnt bend , but it does , very dissapointing.. i have a auto brake rotor :wink: around here somewhere ?? that is what they use on the otherpower site .. i just got over 340 mA without the gearing a nice improvement..tomorrow i will test it , with the gears..

18th January 2005, 02:37 PM	(permalink)
williB	ok i just connected the generator directly to an Ammeter with 0.7 ohms resistance.. Said meter was reading 1200mA max !! Yes over an Amp !! wow

18th January 2005, 04:22 PM	(permalink)
williB	thanks !! i forgot to add that i it was 0.61 V at 1100 mA .. hmm only 0.671 Watts .. the amount of energy i was putting into it , i was hoping that it was more.. i could only keep it over an amp for about 30 seconds..

18th January 2005, 06:27 PM	(permalink)
williB	great suggestion Nigel !! stats :: Code: ohms Volts Amps Power 1 1.26 1.22 1.533 W 6 5.4 0.92 4.97 W 10 7.7 0.7 5.39 W 11 8.03 0.799 6.42 W

19th January 2005, 12:07 PM	(permalink)
jrz126	Looks pretty interesting. If I didnt have so many other projects that I'm working on, I'd think about giving that a try. Like Nigel said, it's pretty interesting to see your progress. oh yeah and congrats on your 100'th post in this thread __________________ Jeff To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be.

20th January 2005, 07:40 AM	(permalink)
FRIED	Go here:http://www.fp.co.nz/ and ask them about smart drive motors. They already do what you want.