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Balduz
For this little Fans and Wires there is a 5 Watt 10 Ohm resistor enough.
The 3055 can handle 7 Amps at the base, but lesser high voltage,
the target is, to bring the Voltage down, just have enough, that it gets triggered.
The Coils with usually 60-80 Ohms in this thin Wires create a higher Resistance,
that you can adjust your Pot at about 200 ohms and more.
That Base Resistor is only for, that you dont burn the Transistor when you turn the Potentionmeter back to Zero.
When you measure the Voltage between the C and Plus, you should usual find a higher Potential,
especially through a Diode as between Plus and Minus.
But only Potential, not amperage.
Theorizer are like High Voltage. A lot hot Air with no Power behind but they are the dead of applied Work and Ideas.
Hi folks, Well that was a learning experience. It seems the large fan had all the 4 stators wound bifilar and were in series. Though since i could not get to the wires i had to rewind my own coils, which wasn't that difficult. The only problem is that i used 30 gauge wire and apparently that is not thin enough. Each series coil pair was 2.5 ohms, whereas a typical pc fan probably is 25 ohms per coil, so 50 ohms per coil pair. So this meant that my 30 gauge coils did not generate enough trigger voltage signal to fire the transistor, even though i also tried a darlington pair and still no luck.
So I dug up a few more fans from the old computer supply bin and found a nice smaller, 3" diameter blade, pc fan. This one did not have bifilar winds. So it started right up on 12 volts. Though at 12 volts the speed is a little low, though it draws 80 milliamps at 12 volts, that could be why. So i tried 24 volts and it really flies on 24 volts @ 150 milliamps and the transistor is stone cold. The fan is sticker rated at 12v, .14A. Haven't tried using the flyback yet, I'll see later today how that is.
Has anyone else rewound their stators and got it to work and if so, what gauge wire did you use, thanks.
peace love light
Tyson
Hi folks, Well that was a learning experience. It seems the large fan had all the 4 stators wound bifilar and were in series. Though since i could not get to the wires i had to rewind my own coils, which wasn't that difficult. The only problem is that i used 30 gauge wire and apparently that is not thin enough. Each series coil pair was 2.5 ohms, whereas a typical pc fan probably is 25 ohms per coil, so 50 ohms per coil pair. So this meant that my 30 gauge coils did not generate enough trigger voltage signal to fire the transistor, even though i also tried a darlington pair and still no luck.
So I dug up a few more fans from the old computer supply bin and found a nice smaller, 3" diameter blade, pc fan. This one did not have bifilar winds. So it started right up on 12 volts. Though at 12 volts the speed is a little low, though it draws 80 milliamps at 12 volts, that could be why. So i tried 24 volts and it really flies on 24 volts @ 150 milliamps and the transistor is stone cold. The fan is sticker rated at 12v, .14A. Haven't tried using the flyback yet, I'll see later today how that is.
Has anyone else rewound their stators and got it to work and if so, what gauge wire did you use, thanks.
peace love light
Tyson
I rewound one of the coils on the five inch fan kit from r-charge. That worked okay. but then one of the other coils had a short and burned out. I
have more wire to rewind it # 24. But Rick on the video said to use thinner gauge wire if possible and rewind all the coils. I burned out the transistors
MJL21194's when the other coil shorted. When I attempted 3 inch fans, the
first one was bifilar . The second was the exact one from the Imhotep video. It was glued together so strongly that I broke all the posts except one. Still
going to keep on trying. I was wondering what transistor you were using ? I
still have one good 2n3055 left if I ever get one of these fans set up properly.
Hi FRC, I'm using a 2n3055 with a 150 ohm base resistor with 10kohm pot. It runs well at around that 150 ohms and if i turn the pot just a little, the fan shuts down. So it probably needs a 200 ohm or less base resistor.
I also checked continuity and polarity with a small magnet before i put it back together, learned my lesson from messing with that bigger fan. I'm sure I could get that 120mm fan working if I used a smaller gauge wire. That's why I'm surprised you got one to work with 24 gauge wire. That must be only like an ohm per coil pair.
I've been charging a 6 volt gel cell with the flyback, it's slow going, but charging nonetheless and giving me a nice breeze for air circulation.
It would be nice to get a little more speed at 12 volts. I notice theremart, in his video shown on imhotep's website, his is running very fast. I wonder if he is using 12 volts or not. Will be doing more tests and probably going to modify a few other old fans i have laying around.
peace love light
Tyson
Thanks for the info Skywatcher. I think I will try the five inch fan with the basic
circuit, maybe with 24 volts. The kit was meant to work with 24 volts anyway.
I just thought you had to have the two mjl21194's bigger diodes and resistors
with this particular fan. Those three inch fans are so hard to see into and work with. Its like you not only need a magnifying glass, you need a microscope.
Hi FRC, thanks for the reply, Ok so then maybe theremart was using 24 volts or he was using a cpu fan, which probably has a higher rpm.
So could you give more info on which fan worked with 24 gauge and any details, thanks. The small 3" fans are not that difficult to work on, though i must say i have a really bright light shining on the work area, so that helps and i'm not using a magnifier.
Hi RyanWiley100, maybe you could explain what you need help with and i'm sure any of us could help you.
peace love light
Tyson
Sorry it was not 24 gauge it must be 26 or 28 it was finer than 24. I had tried to wind the one coil with what must have been 18 because it was a lot thicker
but was not long enough (got it off an old transformer) Now I have replaced that coil with 24 that I bought. don't know if it will work but I have more turns.
The mismatching might just screw things up and maybe will have to rewind all the coils. But then I can get the a whole new 5 inch fan for $15.00 but would have to wait ordering it. The 5 inch fan I have been using is the one that came
with the 5 inch fan kit from r-charge.com used to be potentialtec.com (John
Bedini kits made by Rick Frederich).
Ok, I rewound one of the coils with # 24 gauge and managed to break off one of the wires from another coil. So unwound that one. Rewound this one # 24 again so now even two of each. Put it back together, one set the motor works.
Other set does not. So if hooked up to circuit would get fan but no charging.
Current is going through coils that did not work. So does this mean that coil
was wound backwards instead of clockwise and has to be rewound?
Ok, I rewound one of the coils with # 24 gauge and managed to break off one of the wires from another coil. So unwound that one. Rewound this one # 24 again so now even two of each. Put it back together, one set the motor works.
Other set does not. So if hooked up to circuit would get fan but no charging.
Current is going through coils that did not work. So does this mean that coil
was wound backwards instead of clockwise and has to be rewound?
Can anybody answer please
FRC
Hi FRC, I think you might be right, wound the wrong way would attract I think. Maybe you can try tapping the wire's on a battery the other way around. see what happens. Don't hold the wire on there too long though. I'm not sure if it will require rewinding or if it can be used with the wire's reversed. Maybe someone else can say, i'm not certain.
Maybe you have a bad connection somehow, it took me a few go's to get the fan to work, did you bare the wire ends, I know from experience with my fan it was quite a challenge to solder the wire to the post without melting the plastic part of the stator the pin was mounted in. I'm not good with fine wire so it was frustrating for me, but worth it. I learned a lot from my little fan. Every now and then I let it work on a battery. If it weren't for what that little fan taught me I would be still buying batteries.
Thanks, I already tried switching polarities. This is a 5 inch fan I am working on
right now not the small three inch power supply ones. I have lots of those to try again. I think I will have to rewind again. I am pleased that I got it back working with just the two poles and the different mismatched gauge wire it still worked. It is just the charging poles I have to fix.
In the fan's current state it could work as a Lockridge setup if I could make a
small commutator with two sets of brushes.
Update
-------
Tore the fan apart again and reconfigured the connections without rewinding the two coils
that were not working. Now everything works. Now just have to make another circuit and hook it up.
@ Skywatcher, that bigger fan you started with has a smaller set of coils than the one I have. The model I have is a Comair Botran model # 039730. Hope it works with just the one transistor basic Bedini circuit.
FRC
Last edited by FRC; 01-17-2011, 10:01 PM.
Reason: opdate
Hi farmhand, thanks for jumping in here to help. Hi FRC, glad you got it working.
I'm not sure what you mean by, you have bigger coils, do you mean you have more wire or do you mean your wire gauge is bigger.
Also, i'm not sure what you mean by charging coils.
As far as i know and by the way i have my fan wired, we have one pair of drive power coils and one pair of trigger coils and then we take the flyback off the drive power coils to charge batteries.
I checked my 6volt lead acid gell cell today. It held its charge very well, while charging yesterday it was at 6.12 volts and today it is holding at 6.11-6.12 flipping between the two numbers. So it's definitely NOT a fluffy surface charge.
Though I'm going to guess it's probably better to charge a lower voltage battery off the flyback end.
So if using a 12volt, 7AH input battery, then I would use two 6volt, 7AH batteries in parallel to charge for best results.
Though a 12 volt on charge still seemed to charge, just not sure if it will end up being a fluffy charge, will have to test and see.
Also, i took apart another small 3" fan i had and it had a stator of one continuous winding, with 3 iron stators poles on top and 3 offset on bottom. I've never seen a geometry like that. Only problem is, i can't get the stator off and have already done minor damage to it trying to take it off.
I will be testing more with this other 3" fan. Also, I'm not sure how the lockridge device is supposed to work, since it seems so top secret here, nobody is sharing much details.
peace love light
Tyson
Hi folks, I pulled out the stator from that 3" pc fan, though I had to break the plastic base it was on, though I can superglue it back in place.
Reason i had to break is because it has some kind of metal threaded tube sleeve that was keeping the stator iron pieces and coils from popping out.
Anyway, as you can see in the pic, it has one continuous bifilar coil and if you notice it has 3 stator poles on top and 3 stators poles on the bottom offset.
The fan is a SUNON 12volt and just says 2watts.
I wonder if this will work with the Bedini switching circuit, i think it could work. Let me know what you folks think.
Edit: and each coil is 33 ohms and seems to be a little thicker gauge than my other fan.
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