John_Koorn wrote:
Nice work Alvaro!
John K.
AlvaroHN
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min2oly wrote:
2n2222 - Nice!
Try running it on your 5v and charge the 12 volts, maybe with a simple cap dump via larger transistor or just straight to the 12V...
KR - Patrick
Hi,
I got back into my little ssg motor that I posted in this thread 2~3 years ago.
At that time I had it with a bifilar coil for the motor, 1 trigger and 1 power winding. Now I made a larger coil, with 8 strands of wire, 1 trigger, 7 power.
The circuit is the same as the advanced book, but with small transistors, 2n2222. All matched up and everything.
It runs much faster!, with the old coil it ran 3000++ RPM at 12 volts. and everthing got hot, the coil and transistors.
Now with this coil I have not tryed to run it on 12v... yet.
with 5v input from a phone charger, it runs at 3600++ RPM. o.O
in the past I wondered why mine droped a lot of RPM with the gen coils in place (not connected, just drag from the iron cores). And the SSG from the advanced book didn't drop any RPM with the gen coil. Now I see that I had 1 power winding, and 6 gen coils... the SSG from the book had 7 power windings and 1 gen coil... totally different story.
I have to start new tests now, I have to get other batteries because the lifepo4 that I had at the time are not in the best shape. And I want to try with normal batts, I might get some new 6v 4ah batteries. And see what happens on 6V. It might get up to 4000 RPM.
I don't want to run it on 12V because I am afraid that those magnets escape from the rotor or something. I have to make a better frame...
I might put all 6 gen coils back in, out of phase each with independent diode charging a cap dump circuit. I also have to experiment with the AC cap that John had in the 1984 booklet in the gen coils.
here are some pics that I took just now, with 1 gen coil going to the new cap dump circuit that I made.
best
Alvaro
I got back into my little ssg motor that I posted in this thread 2~3 years ago.
At that time I had it with a bifilar coil for the motor, 1 trigger and 1 power winding. Now I made a larger coil, with 8 strands of wire, 1 trigger, 7 power.
The circuit is the same as the advanced book, but with small transistors, 2n2222. All matched up and everything.
It runs much faster!, with the old coil it ran 3000++ RPM at 12 volts. and everthing got hot, the coil and transistors.
Now with this coil I have not tryed to run it on 12v... yet.
with 5v input from a phone charger, it runs at 3600++ RPM. o.O
in the past I wondered why mine droped a lot of RPM with the gen coils in place (not connected, just drag from the iron cores). And the SSG from the advanced book didn't drop any RPM with the gen coil. Now I see that I had 1 power winding, and 6 gen coils... the SSG from the book had 7 power windings and 1 gen coil... totally different story.
I have to start new tests now, I have to get other batteries because the lifepo4 that I had at the time are not in the best shape. And I want to try with normal batts, I might get some new 6v 4ah batteries. And see what happens on 6V. It might get up to 4000 RPM.
I don't want to run it on 12V because I am afraid that those magnets escape from the rotor or something. I have to make a better frame...
I might put all 6 gen coils back in, out of phase each with independent diode charging a cap dump circuit. I also have to experiment with the AC cap that John had in the 1984 booklet in the gen coils.
here are some pics that I took just now, with 1 gen coil going to the new cap dump circuit that I made.
best
Alvaro
Aaron Murakami wrote:
Yes, you can use those lifepo4's on a small build and they shouldn't explode.
Aaron Murakami wrote:
Depends on the gap.
At the conference, it has 0 rpm loss when the lights were on. The gap at that time was far enough away that there was no difference.
With the gap as it is now at 1/2 the gap, 2% loss in rpm with the lights on. If it is 356 with led's off with that gap, I'd estimate it might pick up another 5-10 rpm if the generator coil was completely removed.
I have some tests planned for that machine and I can measure that at that time by removing the generator coil completely.
Or maybe just let it like that, since the amp draw is proportional to speed, so I don't care if I am losing some rpm since the amp draw also goes down.
Aaron and Peter congratulations on the 2 hours video of the live call, I couldn't make it and the video was very good for me, it was very interesting and also fun.
There is this subject that interested me the most, the lifepo batteries, since I was looking the other day for batteries for my little ssg with gen coils that I making (photos a couple of posts back).
The other day I got some lineal hall sensors so finally I was able to measure my magnets and match them!, now that I have them all matched, I am finally going to tune the SSG circuit, I haven't put an ammeter in the input yet because I didn't had an analog ammeter at the moment, but I bought 1 today, (I lost all my stuff from my olds SSGs).
The thing is that as my calculations I am going to need a very small battery for this. Because if a regular SSG power winding consumes 250 mA at 12V when the power winding is around 1 ohm, and since my power coil is around 12 ohms the amp draw is going to be 250mA/12 = 20 mA !!!. I hope/expect/wish that my calculations are correct, and I going to find out today.
So if my SSG circuit amp draw 20 mA, I would just need a 400mAh battery to run 20 hours.
And that became a problem, because smallest battery I could find was 12v 1ah sealed lead acid batt, which would run 20mA for days making my experimentation very long. And you said that gel cells are crap, sealed lead acid batt is the same as gel cell isn't???
But! on ebay there are these AA size LIFEPO4 batts rated at 3,2 volts 400 mAh, and four of those in series would make 12,8 volts 400mAh.. is perfect!
Is ok to use those batts? or they would explode?
best,
Alvaro
There is this subject that interested me the most, the lifepo batteries, since I was looking the other day for batteries for my little ssg with gen coils that I making (photos a couple of posts back).
The other day I got some lineal hall sensors so finally I was able to measure my magnets and match them!, now that I have them all matched, I am finally going to tune the SSG circuit, I haven't put an ammeter in the input yet because I didn't had an analog ammeter at the moment, but I bought 1 today, (I lost all my stuff from my olds SSGs).
The thing is that as my calculations I am going to need a very small battery for this. Because if a regular SSG power winding consumes 250 mA at 12V when the power winding is around 1 ohm, and since my power coil is around 12 ohms the amp draw is going to be 250mA/12 = 20 mA !!!. I hope/expect/wish that my calculations are correct, and I going to find out today.
So if my SSG circuit amp draw 20 mA, I would just need a 400mAh battery to run 20 hours.
And that became a problem, because smallest battery I could find was 12v 1ah sealed lead acid batt, which would run 20mA for days making my experimentation very long. And you said that gel cells are crap, sealed lead acid batt is the same as gel cell isn't???
But! on ebay there are these AA size LIFEPO4 batts rated at 3,2 volts 400 mAh, and four of those in series would make 12,8 volts 400mAh.. is perfect!
Is ok to use those batts? or they would explode?
best,
Alvaro
Aaron the RPM measurements that I did was with the coils unconnected to anything. That is why I say that my RPM decrease is just because of the iron core alone.
I saw in the book video preview that you did loose 5 RPM when the leds where on.
But my question is. Les say you have 356 RPM with leds off. And 351 RPM with leds on. But what is your RPM with no gen coil in the frame? Is still 356? Or more?
Best
Alvaro
I saw in the book video preview that you did loose 5 RPM when the leds where on.
But my question is. Les say you have 356 RPM with leds off. And 351 RPM with leds on. But what is your RPM with no gen coil in the frame? Is still 356? Or more?
Best
Alvaro
Aaron my RPM drop is with no gen coils installed vs 6 gen coils installed. The RPM drop is just because of the iron cores. When I rectify the gen coils to a cap I didn't noticed any significant RPM drop.
In your demo ssg did you measure rpm without gen coil in place vs gen coil in place?
In the book says that core net drag is 0, which makes perfect sense to me. But I do loose RPM because of the core.
About the gen coils voltage: I get 12 v from each pair of gen coils but the input voltage is 5v. Yesterday I used a death battery as input standing at 9 volts under load, with that input voltage the RPM went up to 2200 and the gen coils would give 20 volts.
I'm attaching pics.
Best
Alvaro
In your demo ssg did you measure rpm without gen coil in place vs gen coil in place?
In the book says that core net drag is 0, which makes perfect sense to me. But I do loose RPM because of the core.
About the gen coils voltage: I get 12 v from each pair of gen coils but the input voltage is 5v. Yesterday I used a death battery as input standing at 9 volts under load, with that input voltage the RPM went up to 2200 and the gen coils would give 20 volts.
I'm attaching pics.
Best
Alvaro
Yesterday I changed around my 6 gen coils, and put them in 3 groups of 2 in series, now I get 12 volts out of each pair, the 3 groups are out of phase.
I received a package of a laser tachometer that I bought on china (US$ 16), and did measurements of the rotor speed without gen coils, and with gen coils in place without connect, and I do lose some RPM with the gen coils in place.
It was 1950 RPM with no gen coils installed, and 1550 with the 6 gen coils in place. This little crap is going faster that I thought, probably because the small size isn't? The diameter of the rotor is 10 cm.
Today I will connect the output of the 3 pairs of gen coils to a cap, and then I have to dump it.
Can someone suggest an easy cap dump method? In the future I would buy one of the John B comparator cap dump circuits, but I have to find some other method for now. Any ideas? zener + transistor or SCR is viable? or not?. Or is better something with a 555, I have a 555 circuit that made when I was waiting for the rotor/magnets/magnet wire/etc. (But I would have to modify it since is 50% 50% duty cycle.
I have another question: can I mix in the same cap the radiant output of the ssg coil, with the output of the gen coils? or I have to use different caps and different dump cap for each?
best,
Alvaro
I received a package of a laser tachometer that I bought on china (US$ 16), and did measurements of the rotor speed without gen coils, and with gen coils in place without connect, and I do lose some RPM with the gen coils in place.
It was 1950 RPM with no gen coils installed, and 1550 with the 6 gen coils in place. This little crap is going faster that I thought, probably because the small size isn't? The diameter of the rotor is 10 cm.
Today I will connect the output of the 3 pairs of gen coils to a cap, and then I have to dump it.
Can someone suggest an easy cap dump method? In the future I would buy one of the John B comparator cap dump circuits, but I have to find some other method for now. Any ideas? zener + transistor or SCR is viable? or not?. Or is better something with a 555, I have a 555 circuit that made when I was waiting for the rotor/magnets/magnet wire/etc. (But I would have to modify it since is 50% 50% duty cycle.
I have another question: can I mix in the same cap the radiant output of the ssg coil, with the output of the gen coils? or I have to use different caps and different dump cap for each?
best,
Alvaro
lol, I had the same problem the other day.
Aaron Murakami wrote:
If you do make 2 sets of 3 coils in series, when putting the output in parallel, probably have to go through diodes so they don't discharge into each other.
If your generator coils are charging a cap that you want to dump to a battery, I would dump it from that cap without further discharging into inductors, etc... you will have the least amount of loss that way.
I made 1 coil with single wire and 800 turns. 1 coil bifilar twisted and connected in series with 400 turns. 1 coil quadfilar twisted and connected in series with 200 turns.
I placed the three gen coils along with the motor coil. All coils out of phase. And started the machine.
All 3 gen coils gave me the same voltage. 7, 7 volts. Only with a difference of .2 volts between each other. One was 7, 5v, another was 7, 7 and the third 7, 9v.
I believe the difference is that probably I had some small difference in the air gap of coils.
So that's it. It didn't make any difference.
I got 7 volts instead of 5 volts. Because the rpm was higher. I was using 3 coils less than when I got 5 volts.
I will do what you Aaron told me to do. Connect 2 or 3 coils in series. Hope I don't get too much drag placing 3 coils facing the cores at the same time.
I have to say that the motor coil, which is a bifilar ssg circuit, is not tuned at all, in totally the opposite of been tunned, lol. Right now I don't have the tools to tune it, I am waiting for some hall sensors that I bought online to match the magnets, when I have all magnets matched I will tune it correctly. I just have 200 ohms in the base of the 2n2222, the trigger winding and the power winding have 12 ohms each (if my multimeter is correct). So I would probably will get more out of my gen coils when the ssg circuit is properly tunned. But I will put them in series anyway and work on the generator part while the hall sensors arrive.
Best
Alvaro
Thank you Aaron I appreciate it, because I am not going to be able to do it by phone.
Hello Aaron, it will be just by phone? or online also?
Aaron Murakami wrote:
Alvaro,
If you want to do a test with the coils as is, wire 3 of the gen coils in series see what voltage you get. You might as well test that out since they're already wound. If promising, series the other 3 coils and then parallel the output of each 3 coil series set to your cap or whatever.
Although if multi wire series coil (like the demo coil in the book) is superior to single wire coil, I will have to change it.
I am looking forward to that Q & A session.
Aaron, by the way... once I read in your other forum that you where telling somebody that to pass energy cap to cap it would be better to do it cap-inductor-cap, do you know how much energy would be transfered ? how much %.
I ask this because I am thinking in storing the energy from my 6 gen coils in a cap, but insetead of dump that cap to a batt right away, I would dump the cap into another coil (with the pressice timing to help rotation of the wheel) with a full bridge rectifier to another cap and then yes, dump to a battery,... or perhaps that process could be done lots of times, charge a cap - discharge through a power coil - capture the spike charge a cap - and repeat etc.
what you think about it?.
best
Alvaro
Tom C wrote:
oh and that is a good looking rotor my friend!! nice work! here is as website on diy windmill genny it may provide some answers, especially concerning delta and wye arrangement for multiple coils.
Choosing the right domain name can be overwhelming. Our personalized customer service helps you get a great domain.
Tom C
best
Alvaro
Tnx tom I gueas I will have to try.
I'm going to make a bifilar and another with 4 wires. And compare.
Best
Alvaro
I'm going to make a bifilar and another with 4 wires. And compare.
Best
Alvaro
Helllo does anybody knows the voltage relationship between coil turns and wires in series in a gen coil?
I'm making a small ssg with 1 power coil and 6 gen coils. I made the gen coils 1 fillar just 1 wire 800 turns. But they make 6 volts rectified to a cap. And I am running with 6 volts input. So I want to get more volts out of them.
Same wire but bifilar would be 400 turns. That would give me more volts isn't?
If that is so, does any body knows the relationship? 3 fillar in series? 4 fillar... etc. 8 fillar would be 800 turns ( since just 1 wire is 800 turns).
I wanna know if the number of wires in series is proportional to the voltage output (also inversely proportional to amps but I don't want amps).
I would connect all 6 coils in series but they are out of phase.
I'm attaching pics.
Best
Alvaro
I'm making a small ssg with 1 power coil and 6 gen coils. I made the gen coils 1 fillar just 1 wire 800 turns. But they make 6 volts rectified to a cap. And I am running with 6 volts input. So I want to get more volts out of them.
Same wire but bifilar would be 400 turns. That would give me more volts isn't?
If that is so, does any body knows the relationship? 3 fillar in series? 4 fillar... etc. 8 fillar would be 800 turns ( since just 1 wire is 800 turns).
I wanna know if the number of wires in series is proportional to the voltage output (also inversely proportional to amps but I don't want amps).
I would connect all 6 coils in series but they are out of phase.
I'm attaching pics.
Best
Alvaro
Amazing, this books covers most of the questions and doubts that I had, and been asking lately.
Thank you Peter, Aron and John! and all who is involved.
best,
Alvaro
Thank you Peter, Aron and John! and all who is involved.
best,
Alvaro
Joster wrote:
Please post that link!!