Hi! Can you please teach me or give some guidelines on how to determine the parameters of coil like its number of turns at what diameter and gauge wire to be used given the power and voltage? If you won't mind, can you also teach me on how to size a magnet and the parameters to be considered?
I'm sorry that I have a lot of question since I was a Mechanical Eng'g student and I was not that familiar with the coil sizing.
@marlonanthonyng That is a big topic. Perhaps the best way to start is to find a generator that works the way you want it to and design yours about the same size. It would also be good to join a forum where they regularly talk about generators to get some pointers. Quite often there is no "right answer" just ones that are more expensive than others (magnets too big or too much copper or steel).
@cismo99 It depends on how much power you want to make, at what voltage and at what RPM. If you are just starting out, you might want to join a forum where others are building generators and ask for their input. I frequent a forum at vawts.net where there are some people quite knowledgeable about generators.
@cismo99 Are you going to be turning it by hand? If so, I think you could get it going about 120 RPM. And you will only need 2-3 volts depending on the color of the LED. A spiked waveform would probably suffice. I would go with just two reasonably sized magnets (say 3/4" x 3/4" x 1/4" thick) and skip the other "pole plate." Then take a thin gauge wire (like 30 AWG) and make a flat coil (about 3/8" thick or less) with about 120 turns and hold it near the magnets.
@cismo99 This turbine might be a good model: search under "Lynxsteam" and "Haitian Turbine." I think there are two videos like that by LynxSteam. He has a nice small generator there.
I invented a breakthrough energy source which violates the law of energy conservation. I have a PROOF that there are electrodynamic phenomena which violate the law of energy conservation. Making a 6kW generator will cost $1200 in mass production, value of the energy produced yearly $5400.
@juancarlosruiz1985 I'd have to review my notes, but I think I later tweaked the design and went with fewer turns ... like 110 or so. In retrospect, I would have preferred 120. My turbine does not start producing until the wind is around 2.7 m/s and the turbine is spinning at about 110 RPM. Our wind speeds are lower than I expected and we don't get above 2.7 m/s very often. I also used 24awg wire which is a bit small, 22awg would be okay for the power I'm looking at.
@kenoki007 I made an engineering drawing and took it to a local machine shop. The machine shop ordered the steel and cut the disks etc. They weren't cheap, but its a hobby and I budget for it. :-)
I fascinates that I can't find anyone who doesn't tell me about this or that computer program when I ask about the mathematics of anything having to do with not just wind turbines, but just about anything else. I don't want to spend tons of money (my reason for building a turbine is, among other things, economy) on computer games. Does anyone know how to do the calculus necessary for knowing the maximums and minimums of the various factors here (just curious - I've already done the math)?
@Jujigatamesan Without FEA software, it seems that there is no nice way to calculate magnetic field strength. I've just been making a rough approximation to hopefully get near a good solution. Likewise with the airflow through the turbine. I've been making assumptions about the turbine efficiency at different TSRs. Sometimes it is necessary to just build one and see how it goes.
@mosesravoori A stronger magnetic field would result in higher voltage output for a given coil. And that higher voltage output would result in more current. So, yes you would get more current. :-)
I made a spreadsheet and simulated three sine waves (120 deg apart) with peak to peak voltages four times as high as I had with the test coil. Then I found the voltage difference between the high and the low at each angle (if I recall, it turned out to be a constant value). Knowing the RPM and voltage, I compared the value to the desired volts/RPM slope and adjusted the number of coils. It turns out that my estimate was a little low, probably because the real output was not purely sinusoidal.
@POMPAYPEE It can be complicated because you want to match the load to the output of the wind turbine. A good place to start is to know what size turbine you have and how fast it spins at the windspeed where you want to start charging your battery. Then design to create enough voltage at that speed.
@saidsnoop More turns means a higher resistance in the wire since the wire will be longer. That also translates into lower efficiency. The farther the magnets are apart, the weaker the magnetic field. So it is best to keep your coils thin. Almost any coil will work, but some coils work better than others.
But the coils are too thin, i suggest to build another stator (you should use a thicker wire and more turns ) and the Power difference would be enormous
Thanks. I might have gotten away with 22 GA wire instead of the 24 GA in the current design. I am in the process of making a new wind turbine and that one will have thicker wire. My hope was that the thinner wire would be a better match between the turbine's power and the generator's output. It wasn't too bad a match although I would have liked perhaps 110 turns instead of the 100 turns I have now.
were to you buy the magnets
2DAREPUBLICAMEXICANA 3 weeks ago
@2DAREPUBLICAMEXICANA Lately, I've been getting my magnets from Magnets4Less.
Caleb6543 3 weeks ago
,mnbbnj
shansgd 2 months ago
This has been flagged as spam show
24 V Generator site Weeb discoide1451
discoide1451 4 months ago
Hi! Can you please teach me or give some guidelines on how to determine the parameters of coil like its number of turns at what diameter and gauge wire to be used given the power and voltage? If you won't mind, can you also teach me on how to size a magnet and the parameters to be considered?
I'm sorry that I have a lot of question since I was a Mechanical Eng'g student and I was not that familiar with the coil sizing.
Thank you for your time!
marlonanthonyng 8 months ago
@marlonanthonyng That is a big topic. Perhaps the best way to start is to find a generator that works the way you want it to and design yours about the same size. It would also be good to join a forum where they regularly talk about generators to get some pointers. Quite often there is no "right answer" just ones that are more expensive than others (magnets too big or too much copper or steel).
Caleb6543 8 months ago
@Caleb6543 Okay sir. Thank you very much!
marlonanthonyng 8 months ago
hello, a question how do you know, how many magnets to use and how many coils and the turns ?
cismo99 9 months ago
@cismo99 It depends on how much power you want to make, at what voltage and at what RPM. If you are just starting out, you might want to join a forum where others are building generators and ask for their input. I frequent a forum at vawts.net where there are some people quite knowledgeable about generators.
Caleb6543 9 months ago
@Caleb6543 thx, i don't expect much its just a generator for school, and for turn little Led's or Led Lamp some like that. thx
cismo99 9 months ago
@cismo99 Are you going to be turning it by hand? If so, I think you could get it going about 120 RPM. And you will only need 2-3 volts depending on the color of the LED. A spiked waveform would probably suffice. I would go with just two reasonably sized magnets (say 3/4" x 3/4" x 1/4" thick) and skip the other "pole plate." Then take a thin gauge wire (like 30 AWG) and make a flat coil (about 3/8" thick or less) with about 120 turns and hold it near the magnets.
Caleb6543 9 months ago
@cismo99 This turbine might be a good model: search under "Lynxsteam" and "Haitian Turbine." I think there are two videos like that by LynxSteam. He has a nice small generator there.
Caleb6543 9 months ago
This has been flagged as spam show
@Caleb6543 thx, i don't expect much its just a generator for school, and for turn little Led's or Led Lamp some like that. thx
cismo99 9 months ago
This has been flagged as spam show
I invented a breakthrough energy source which violates the law of energy conservation. I have a PROOF that there are electrodynamic phenomena which violate the law of energy conservation. Making a 6kW generator will cost $1200 in mass production, value of the energy produced yearly $5400.
I am looking for $6M for a prototype and patents.
H. Tomasz Grzybowski
tel. +48-512-933-540
henrykay01 1 year ago
Oh that's good. Is it for 12 volts?
juancarlosruiz1985 1 year ago
@juancarlosruiz1985 Yes, I've just got one 12 volt deep cycle battery.
Caleb6543 1 year ago
How has this been working out for you and is it 120 turns of 22awg wire?
juancarlosruiz1985 1 year ago
@juancarlosruiz1985 I'd have to review my notes, but I think I later tweaked the design and went with fewer turns ... like 110 or so. In retrospect, I would have preferred 120. My turbine does not start producing until the wind is around 2.7 m/s and the turbine is spinning at about 110 RPM. Our wind speeds are lower than I expected and we don't get above 2.7 m/s very often. I also used 24awg wire which is a bit small, 22awg would be okay for the power I'm looking at.
Caleb6543 1 year ago
where did u get the red disks ??? i have trouble looking for metal disks
kenoki007 1 year ago
@kenoki007 I made an engineering drawing and took it to a local machine shop. The machine shop ordered the steel and cut the disks etc. They weren't cheap, but its a hobby and I budget for it. :-)
Caleb6543 1 year ago
I fascinates that I can't find anyone who doesn't tell me about this or that computer program when I ask about the mathematics of anything having to do with not just wind turbines, but just about anything else. I don't want to spend tons of money (my reason for building a turbine is, among other things, economy) on computer games. Does anyone know how to do the calculus necessary for knowing the maximums and minimums of the various factors here (just curious - I've already done the math)?
Jujigatamesan 1 year ago
@Jujigatamesan Without FEA software, it seems that there is no nice way to calculate magnetic field strength. I've just been making a rough approximation to hopefully get near a good solution. Likewise with the airflow through the turbine. I've been making assumptions about the turbine efficiency at different TSRs. Sometimes it is necessary to just build one and see how it goes.
Caleb6543 1 year ago
@Caleb6543 If I use Neo-Dymium magnets with more power , does the current increases? Please advice for my project...
mosesravoori 1 year ago
@mosesravoori A stronger magnetic field would result in higher voltage output for a given coil. And that higher voltage output would result in more current. So, yes you would get more current. :-)
Caleb6543 1 year ago
@Caleb6543 thank u sir , can u give some more input on this subject...
mosesravoori 1 year ago
I made a spreadsheet and simulated three sine waves (120 deg apart) with peak to peak voltages four times as high as I had with the test coil. Then I found the voltage difference between the high and the low at each angle (if I recall, it turned out to be a constant value). Knowing the RPM and voltage, I compared the value to the desired volts/RPM slope and adjusted the number of coils. It turns out that my estimate was a little low, probably because the real output was not purely sinusoidal.
Caleb6543 1 year ago
How do you calculate how much voltage output you wanna get in your magnetic wire turns?
POMPAYPEE 1 year ago
@POMPAYPEE It can be complicated because you want to match the load to the output of the wind turbine. A good place to start is to know what size turbine you have and how fast it spins at the windspeed where you want to start charging your battery. Then design to create enough voltage at that speed.
Caleb6543 1 year ago
What does it matter how much copper is used and how many times around in a circle?
saidsnoop 2 years ago
@saidsnoop More turns means a higher resistance in the wire since the wire will be longer. That also translates into lower efficiency. The farther the magnets are apart, the weaker the magnetic field. So it is best to keep your coils thin. Almost any coil will work, but some coils work better than others.
Caleb6543 2 years ago
thnx m8 !
saidsnoop 2 years ago
hmm, really nice design
But the coils are too thin, i suggest to build another stator (you should use a thicker wire and more turns ) and the Power difference would be enormous
PleasureTV 2 years ago
Thanks. I might have gotten away with 22 GA wire instead of the 24 GA in the current design. I am in the process of making a new wind turbine and that one will have thicker wire. My hope was that the thinner wire would be a better match between the turbine's power and the generator's output. It wasn't too bad a match although I would have liked perhaps 110 turns instead of the 100 turns I have now.
Caleb6543 2 years ago
very nice :)
Wackey123 2 years ago
cheers your a good mate this guy knows what he talking about
bucketrobbert 2 years ago 2
Very nice design!!!!!!!
sjh7132 2 years ago 2