HOW TO BUILD A DIY PMA PART #1 (permanent magnet alternator)

[jeffmolly1]

If you use a standard coil from car alternator it would produce about 14 volts. But the wiring in the coil is fat and too heavy to produce the kind of amps that it takes for a wind turbine. Cars turn at higher rpms than wind can. Therefore changing the coil is nessary to produce the maximum amps that the wind can produse to charging amps for your storage and use.

[josephdupont]

how many volts would it produce with the original coil?? Thats an interesting concept run three wires into your home and put the diodes there water cooled...

[breakdncr85]

how much will this end up costing in the end product

[jeffmolly1]

@breakdncr85 could cost you $150.00

Jeff

[tcrawfordperformance]

can a PMA still be configured to work in a car or truck. im asking this because i have a nice stereo system but having more than three batteries can be a little space consuming (not to mention the astheticism). so can it be done???

[jeffmolly1]

@tcrawfordperformance No they cannot be used in a car at all. There unregulated voltage and will set your wiring unfire.

Jeff

[HostileHST]

Can these be used as brushless motors for DIY electric bikes?

[jeffmolly1]

@HostileHST no they cannot. you need brushes to act as an electric motor.

Jeff

[HostileHST]

@jeffmolly1 That's a bummer, cause that could be a pretty powerful set up. They do make brushless controllers, but I will have to see how all that works. The wonders of Youtubing, hehe. Thank you for the quick reply.

[htomerif]

@jeffmolly1 Im pretty sure it could be used as a motor. if you used it in a 3 phase configuration instead of through the rectifiers. You would have to have a 3 phase motor controller though, and one that worked off of back EMF, since there's no hall effect sensors to tell it which phase to power when. It would be interesting to modify it further and add hall effect sensors and sensor magnets to the rotor shaft. A temperature sensor would also be advisable.

[charlie1957able]

thank you for the videos, where can i buy the replacement rotor and stotter to put back in ?

[crackawise]

please dont tell people to throw it away...instead tell them to recycle it!! good vid!!!

[00700paradox]

Dude looks like tony stark :D

[0RobinHood1]

@00700paradox dude, HE IS Tony Stark

[UrRight2Life]

Thank you!

[Hostz1454]

Nice toy that gen 14 V continusly just one simple spin I guess

[gaywhitekids]

FUCK YESS JEFF!!!!!!!! gonna make my own. May the Entity that created us bless you for sharing this :)

[Npixelvd]

In my country, we use to push a light truck to start a '77 diesel engine when the batteries are dead, and we use the vehicle without the batteries in daytime only. And in 2002 we acquired a new diesel engine manufactured in Japan; someone borrowed the batteries, and so we started the engine by pushing the truck just to park it properly during the night. To my surprise all the lights were powered including the head light. The alternator is producing power without the batteries. Is this the PMA?

[ebarsallo]

wow, amazing!!!! regards from Panama.

[jonathanspindler]

His PMA doesn't have coils behind the magnets. they aren't electromagnets. They are really powerful magnets. I'm pretty sure his magnets are mounted on metal plates, looks like they are machined, not too hard to make if you have the proper tools to do so! which i don't ! bummer! I'm just starting to collect all my material together to start my project, waiting for the magnets from Ebay and then i can go get my rotor machined after i finalized the measurements.

[KnuckleDraggerCustom]

I have a ? I'm fabricating an alternator of a very smaller size for a custom project and cuz of the size, I need to make it a PMA for more volts at lower rpm. the ? I have is what are your stator coils and rotors made of (Metals / Materials) and does the rotor have coils under the magnets or is it just metal plates and magnets and what type of magnets? not looking to make the same design just need to know what they are made of so when I fabricate my alternator it will produce the volts I need.

[jonathanspindler]

Jeff, just a quick few questions if i may!? I currently have a alternator that i plan on converting to a PMA. i plan on rewinding the stator with new wire, there are 36 slots in total and i'd like to wire it 3 phase, my questions are do i use a delta or wye configuration or something different? also what gauge wire do you suggest i use 18? 20? 22? smaller? now with 36 slots present in the core i do plan on using 12 magnets? am i on the right track with this setup? Your videos rock dude !!!

[00773nicolas]

can i use a 65-71 chevy gmc alternator for your pma proyect camaro corvet?

[jeffmolly1]

@00773nicolas yes you can

[joeygronau]

I have a quick Question, what is the difference bewteen your coils and the coils that are already in the alternator?

[jeffmolly1]

@joeygronau the original stator has heavy wire for low voltage high amps.ours have finer wire for higher voltages at low speed.

[helloman1976]

@jeffmolly1 Why would you want higher voltage versus higher amps? Isn't it amps that you want? That's what powers devices and charges batteries so I'm a little confused as to why you would change the coils. Ever consider using a step-up or step-down transformer? Thanks.

[jeffmolly1]

@helloman1976 alot of grid tie inverters require high voltage.

jeff

[planetdarwin]

@jeffmolly1

Question: A lot of homemade alternators have a lot of magnets. If I use 1/10th as many magnets, but gear the shaft so it goes 10x faster, will the output be roughly the same (accounting for the inefficiency of gearing)? In other words, can increasing speed make up for a smaller number of magnets?

[jeffmolly1]

@planetdarwin no it will not.

Jeff

[jwookster]

@helloman1976 I've thought about the same thing. What would happen with a step down transformer?

[jeffmolly1]

@joeygronau yes you can

jeff

[Ebdan88]

I have just bout 6 of them for under a dollar each..But they were old, and rusty and Burned(well most of them) It really is Hard to take all the Wires out, because of the Glu they use....So Now i have to rewind my own, and i have decided to attach to stators together to have a bigger motor. I will go for 2 and not more, because my calculations tells me that 2 stators together would give me around 17 hourse power, and that is fine for my Project..:-)

[akifkaya1992]

how many of these PMA's can power a large family home?

and can it work continously?

plz reply

[jeffmolly1]

@marlin187 tread mill motors are good for one thing only and thats a treadmill.

the guys that sell those are just ripping people off.they need to high rpm to put out anything if they ever do.

[marlin187]

@jeffmolly1 Hey mate.How can I get in touch with you more effectively than Youtube.I hava a few questions that are very important to me since My plans are to build a few of these to donate.Can you please help me on putting together a reliable system.I have no previous experience but I am a fast learner and have some basic knowledge.Thanks a lot for th evideo and advise.

[whackitov]

neodymiums lose magnetism at quite low temperatures compared to other magnets, so im surprised that at the beginning you throw away the cooling fan blade, surely it would be more prudent to keep it in place????

[jeffmolly1]

@whackitov

we have a much better cooling fan to replace the stock fan with.stock fans don't work.

if used for a wind turbine our hubs have cooling holes in them which works very well,never had a problem.

[jeffmolly1]

@whackitov it's not needed for a wind turbine. there are holes in the hub that keep it cooled down.never had a problem with heat.

[rmmnet]

its all very well for you clever guys to talk technical. Have a heart for absolute novices on the subject(s). How about special starter groups where we can ask serious questions without looking stupid. Or how about an adoption system whereby people can attach to experts (for a consideration?). I am interested in Generators /Alternators. Thanks. Somebodyoutthere

[jeffmolly1]

@rahuntrealty

you cannot put it in your car,it would burn your wiring up.

[jmar1371]

What's the advantage of not being able to regulate the field current? Once you have it spun up to R's, how do you control the output?

[jeffmolly1]

@jmar1371

a charge controller regulates the battery voltage and disconnects the pma when there full.

[jmar1371]

@jeffmolly1 So you have no way to control the output. Instead, you disconnect it's load. OK. I'll keep my field coil, thanks.

[tykonj]

GREAT EXPLANATION THANK YOU JEFF

[jeffmolly1]

the alternator case you can use is from 1978 chevy camaro,8 cylinder,350 engine with air.

gm delco10DN,10SI OR 12SI ALTERNATOR.

[antoniskan1977]

The core into magnets is aluminium or iron?

[jeffmolly1]

the rotor core is steel.

jeff

[joe18370]

i would like to see a wind blue alternator vs your alternator,im not happy with wind blue,they paint the rotor and it creates drag by rubbing on the stater,and i think they use cheap magnets

[jeffmolly1]

i will do the video and show that their magnet is not rare earth at all.most with that type of rotor use speaker or micro wave magnets which are just ceramic magnets and cost a couple of bucks.the iron in the original rotor absorbs most of the magnets power anyway,it never reaches the stator coore which is where it's suppose to go.if you truly have a rare earth magnet you would'nt hide it.

[ragingelephants2005]

can you do this in a small version and get the same power?

[jeffmolly1]

no you cannot

[mccunecp]

I know you can buy the totors but can you take the old one take the coil out of it and just dril holes in the fingers and put the round magnets in them the power full ones and glue them in and use those I thik it be cheaper what do you think.

[anewlow23]

Why not just replace the field coils with permanent magnets each one alternating from north to south that way you would have a dc output and would not have to have as much circuitry for a sinusoidal output?

[thundamc]

Hi Jeff, Thanks for the Vid. I am from the UK too, Would be good if you knew what works best here. Safe.

[jeffmolly1]

i'll get back with you on a auto model and year.

[ModellersMemorabilia]

hi jeff. im from the UK , what alternator can you advise which would be suitable and from what vehicle, thanks.

[jeffmolly1]

i'll find out the year and make of auto,maybe some one else knows.

[jeffmolly1]

to pater05s

Sorry it went over your head,i'll use crayons next time just for you.i love you anyway you meanie!!!!

jeff

[cjdistheman1]

LOL jeff

[TheButtaz24]

to jeff how well would ordinary magnets work since i dont have access to neo magnets

[jeffmolly1]

regular magnets will not produce much power.

[jeffmolly1]

they will work ok,just not alot of power output.

jeff

[best333WillC]

Sweet. Are these much more efficient than a normal alternator? I just build a 7 hp diesel generator, with a 12si alternator coupled to it. I have 12" pully on the drive shaft of the motor, so when the motor is going about 900 rpm, the alternator is doing 4300 rpms. Very fuel efficient at this RPM.

Next I want to build a wind turbine, where do i get the parts shown here in this video?

[jeffmolly1]

you can get the parts at missouri wind and solar

link to site is at the subscribe button.

jeff

[TheButtaz24]

well fixing the stator coil wont be a problem for me i rewind them almost every day

[IrlDave71]

Clear and to the point 5 *'s

[WorldStove]

wonderful video, thank you for posting

[mepillusions]

I like the videos but I dont understand why replace everything and where can you get all the stuff you got on the video, how much does it cost? is it worth making one yourself for how much energy it will be putting out? I have another question but im afraid of asking it on here since I have not heard anyone talk about it at all. I was wondering if there was a way I may ask and you can give me a crash course in alternators and the way they build up electricity. new to the concepts here.

[jeffmolly1]

all direct drive small wind turbines the average SHAFT RPM is about 500 to 1500 RPM for small direct drive propellers.

At this RPM you MUST HAVE finer copper wire to make 12 volts

The stock wire in a PMA is to large and will only give 9 volts at about 1000 RPM it will not even "PUT A CHARGE" to a lowly 12 volt battery. the stock stator wire is just to big and thus not enough turns to get the voltage up into the higher charging ranges needed by today's smaller DIRECT DRIVE TURBINES

[kubko29]

yes why do we have replace the stator?i am asking the same question thanks

[kneckter]

Why do you have to replace the stator?

[jeffmolly1]

TO BROWNESS54

i use a sc48c stator core and a slant core plus rotor to make a 12 volt, 500 watt low wind turbine,no cogging.

[browness54]

according to your website witch starter coil did you use in this video?

[BeefyCrackers12]

hey jeff is it possible to make an alternator from a large industrial fan motor?

[jeffmolly1]

to beefycrackers12

it's possible but i have not done it.

[wyattlisadana]

this is the best way to do it. love the videos. They are very informative. I am still also very impressed with your solar furnace. we saved a lot of money this season.

[zackannie23]

Pay attention to what he's doing, take it from me when does something he does it right.

[jeffmolly1]

to zackannie23

thank you for the comment,i wished i did do everything right,i'd be rich.

[meterjuarez]

Thanks for your video is very interesting, I am building a wind and I am interested to know if I can convert to a normal alternator pma my question is to know where the rotor with permanent magnets to be able to convert the way you say.

There are many types and brands of alternators, which do you recommend and where to get the rotr magnet alternator for that.

I'm doing the turbine and the body sends you an example.

Thank you and congratulations on your explanation.

[jeffmolly1]

thanks multigreenman

iam not trying to knock anyone,just trying to help people from making a costly mistake.

[MultiGreenman]

autolayne,wind blue,what a joke and a rip off.watch this guy and decide for yourself,i bought from these people and there great.free expert advice.

[jeffmolly1]

chungsan1

thank you for the nice comment.

check out part 2

[chungsan1]

Very Good Presentation.

Thank You.

[jeffmolly1]

thank you.

check out part 2

[TheButtaz24]

whats the wire size in that new stator you just installed

[jeffmolly1]

I don't know the wire size,i buy them prewound.