HOW TO BUILD A DIY 3 PHASE AC PMA / PART 3 ,SOLAR ENERGY

[joehast]

How can you say it does not matter how you connect the wires. Shouldn't one be pos, one neg, and one the ground.?

[snappy327]

i have to say i am happy to see a company showing the end user how to set these systems up without having to pay for consultation. for that reason alone would make buying from these guys more attractive. i have seen a couple videos on here from end users that refer back to this company with pure loyalty. I was poking around on their site and i didn't see the option to buy the rotor assembly. for someone like myself, i would like to buy all the parts separately and assemble them from scratch.

[ganisierva]

Hi Sir Very nice work, I just wonder how much rpm does it take to charge a 12v car battery using same car alternator stator and magnet you used. thanks for sharing your knowledge to everyone.... (suppose i have a 70amp 12v car alternator, what do you think would be the ideal speed ??? )

[TheDegree777]

How many rpms this pma make?

[OKMUNWURX]

Why use a PM rotor when the original will provide the magnetic field? The original allows voltage regulation : as output voltage rises, the dc feedback to rotor is reduced and so preventing further output increase ( a regulator unit is used; sometimes built in). With the PM rotor, output voltage will vary due to load and rpm. The only reason I can see for using a PM rotor would be for 100% attention free operation....Is that the reason for using a PM rotor? please email me; much to discuss

[rusty2507]

Great videos Jeff. Excellent job of explaining several points I needed cleared up for next project. I've subscribed & am looking forward to viewing more ideas for renewable energy.

Thankyou

[meisterjager66]

The point is the cheaper wiring,less power drop

[nerfren01]

My question is how to make the alternator turn on and off and where it should be placed (if you can get wet) and nothing happens. Also if I can use like the wind away from home and when I would need to move all the electrical things in the house?

[ccowdog72]

I Really enjoyed these video's

[lolonghauler]

are we talking 12v or 240v etc??

[jeffmolly1]

@lolonghauler that depends on the stator core used.Typically they are made for wind turbines and hydro applications.

Jeff

[lolonghauler]

how much power does this out put?

[jeffmolly1]

@lolonghauler that depends on which stator and rotor used.

Jeff

[PiccoloMichela]

This is nice, but how much energy can you produce? Can you show a video where you show the thing working? :)

[JWnFL]

How much power do you lose? if any? using a 3 phase verse a Larger DC cable / wire? is more power communicated with a larger DC wire than the 3 phase back to DC? Thanks... using you super PMA is how I would be wanting to attach, so what works best with your stuff Jeff? Thanks!!!

[chrishorabin]

Just for clarification.

DC has less losses than AC.

DC losses are resistance (ohms)

AC losses are impedance (Z) (ohms)

In the alternator the rectifier is also a voltage regulator, in older alternators the regulator was seperate.

The reason it looks like there is less loss with AC is because the rectifier/regulator is close to the load (battery) and so the volt drop is less.

But all in all this is a very good video. keep up the good work

[chrishorabin]

Just for information. AC power has more losses than DC.

DC losses are resistive only. In AC the losses are capacative reactance and inductive reactance and resistance.

The other point to remember is that the rectifier is now out of the alternator and so has no cooling fan.

[VOODOO74W]

Hi jeff great videos I had a question or two. When you connect the stator core wires with the three phase jack wires you really don't need to connect it to the rectifier in the pma right, it's just cleaner? You could actually just take the rectifier out of the pma and just have the wires connected but they would be loose right? Once you have that rectifier out of the pma you can use it to change the three phase AC back into DC?

[jeffmolly1]

@VOODOO74W that is correct voodoo74w.

[robrice2004]

If I set up my wind turbine with AC can I then hook that up to a very heavy duty wire which I thing is 6 gauge and run it about 400' it start out by my barn and then about 400' to my house I was thinking of doing it that way because I didnt want my inverters and stuff to be out in cold barn or do you think a grid tie inverter would be ok in a barn in below zero temps???????which way is better?????

[jeffmolly1]

@robrice2004 A GRID TIE INVERTER WILL BE OK IN COLD WEATHER.PUTTING IT IN THE BARN WOULD BE BETTER.

JEFF

[frankrbruno]

Why would you go through all the trouble to go from an alternator that has DC output already and convert to AC and then convert it back to DC. Why wouldnt you just leave it all DC? Please explain, Im sure the is a reason I just dont know.

[jeffmolly1]

@frankrbruno 3 phase ac has less loss and is cheaper to run over long distances.

dc uses larger wire and has a loss over long distance runs.

jeff

[tonfazg]

@jeffmolly1

Power loss at the end of a wire is simply calculated with Pl=P1-P2, P2=U2*I2 at the end,P1=U1*I1 at generator output.

Current that flows through wire is the same at beginning and end of wire...Voltage is that drops due resistance of the wire and current flow...

Now, DC wont!! produce more voltage drop trough wire simply because it has equal power as the AC or more importantly it works with same voltage...AC would produce less power drop if you transform that same power but...

[tonfazg]

..but with higher voltage, that would cause lower current and at the end lower power loss since here that isnt case i cant just accept what you say about power loss.

Correct me if i am wrong, but explain it a bit, or it is something you know as a fact through experience with power transfer.

[Floridaprepper]

Jeff, does using 3 phase have the same amount of "power" as using DC?

[jeffmolly1]

@Floridaprepper yes it does.

jeff

[gangstermafia]

thanx for the upload loved the video lol coud you make a video on how to make a strong electromagnet with a power of like 4000N just saying :P thanx

[bearhamo]

Hi Jeff,

When I do an AC output test on my rectifier choosing one of the 3 outputs, is the number I read a total output of all three or is the number taken X3 for a total output? e.g. If I read 12.0 as an output am I getting 36 total or just 12?

Thanks Jeff.

[jeffmolly1]

@bearhamo

you read the dc output only not the 3 phase ac.

[jeffmolly1]

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

gm delco10DN,10SI OR 12SI ALTERNATOR

[tdk1955]

If wired this way do you need a blocking diode on the positive to the battery bank? Thank you for your time. Travis

[jeffmolly1]

No you don't.this is a brushless motor.

[KC08RAS]

hi first of all thanks for your informative videos good to see people out there willing to teach others.

i wanted to ask you if i wanted to jus generate ac/ 3 phase i presume theyre both the same thing, which wire would be positive negative as there are three wires in this vid and if all are positive where is the negative

im not very educated in this department and hope if u can help me out here.

as im in the uk an all power from mains is ac

thanks

[2009mechanic]

@KC08RAS All three of the wires coming from the stator windings are "hot wires".

The electricity from each of the 3 "phases" is actually 120 degrees out of "phase" with the next winding just like how a 3 phase electric motor is wired.

I believe the the windings are configured in a "wye" configuration just like they were originally from the factory.

You cannot hook a 3 phase motor to it as the 3 phase is "wind" and motors don't like it much .

That is why the rectifier is needed to convert to Dc

[2009mechanic]

@KC08RAS All three of the wires coming from the stator windings are "hot wires".

The electricity from each of the 3 "phases" is actually 120 degrees out of "phase" with the next winding just like how a 3 phase electric motor is wired.

I believe the the windings are configured in a "wye" configuration just like they were originally from the factory.

You cannot hook a 3 phase motor to it as the 3 phase is "wild" and motors don't like it much .

That is why the rectifier is needed to convert to Dc

[tdk1955]

Jeff if you wire a pma 3 phase do you need to run a ground wire from the pma or just ground from the rectifier block? Thank you.

[jeffmolly1]

you need to ground the tower to a copper stake.

[fred30680]

You seem to be a knowledgeable guy. Just wondering if you could tell me if this would work.. I have a 60 amp AC power supply. Puts out about 14 to 17 volts. Is there a way to turn it into a power converter ? What I would like to do is set up a windmill generator and use it to charge the batterys.

[jeffmolly1]

i'am sure you cannot convert it.

[HBOUADI]

SIMPLY EXTRA? THANK JEFF

[chevypicks]

Hi Jeff, I've seen all your videos. Nice Work, I have a couple questions. How do you hook up an inverter to a panel box in your home? I'd like to have set up that if you have to much stored power, it feeds it back to the power company and if the house uses to much power from the battery bank (getting low) , that's when power from the power company kicks in to feed the house allowing the batteries to charge. How is that wired in and what would in need to make this happen? Thanks Jeff!

[jeffmolly1]

chevypicks

that would be called a grid tie inverter.

jeff

[LITINNY]

hi jeffmolly1 verry impressive .site thanks for the information ... keep up the good work

[CYCLOPS1941]

CYCLOPS1941

Question, where do you buy the rotor?

[jeffmolly1]

you get the rotor at missouri wind and solar,link is next to suscribe button.

jeff

[jspaarg]

if I get a relatively constant 5mph breeze but the once a month 40mph gust, what type of rotor and rectifier would be appropriate?

[BudsMoKing]

I got a little long winded there. My question is, if your running 3 phase instead of dc from the alternator, why not use the rectifier from the alternator instead of buying or building a new one? This setup is a cost saving measure anyway.

[jeffmolly1]

to budsmoking

if you use the rectifier from inside the pma you have to replace it with a wiring block of some sort.the wires inside the pma have to be hooked up to something other wise they would just hang loose.for us its just easier to leave the old rectifier inside the pma to hook our wires to.

thank you for the intelligent comment,need more like yours.

[CalicoatMaker]

@BudsMoKing eh? The rectifier turns the AC into DC. What are you asking?

[BudsMoKing]

I understand the advantages of running ac instead of dc through long wire runs. The only reason we have ac on the grid is to reduce loss over long distances (dc looses more in transmition). Most consumer electronics operate on dc so have to rectify the ac within back to dc. If we generate our own dc close to home we can eliminate much of the losses by taking out the rectifiers in all the different household electronics easily reducing electrical usage by 20% or more.

[mavamQ]

There is no real difference in losses between ac and dc. AC is used for transmission because it can be stepped up or down in voltage easily, using a transformer. When you step up the voltage, the current is lower and your I SQRd R losses go down. example; 120v at 100 amps is the same power as 12,000v at 1 amp, but the power loss in the wire is 10,000 times higher at the lower voltage. High frequency ac does have some additional loss mechanisms, not relevant here.

[eyesoverskies]

I appreciate this video but am confused a little. What is the advantage of going 3-phase A/C from the turbine instead of DC power to the batteries? Im new at this but when I build, I want to do it right and is why im asking.

thanks.

[jeffmolly1]

to eyesoverskies

the 3 phase ac is cheaper to run than welding cable if you have a long distance to go with your wiring and you won't have a power drop.draw back is exstension cords tend to break with alot of twisting at the top of the tower over time,sucks to take down a tower to repair it.running dc off the pma is what i prefer to do,welding cable is made to take all the twisting without breaking,just make SURE to not use solid strand house wire,EVER.YOU WILL LOOSE YOUR AMPS,

[eyesoverskies]

Thank you, I just want to do it right when I get the chance. I like your vids, keep them coming!

[jeffmolly1]

if your wind turbine is a long way,say 100 foot,from your batteries than welding cable can get exspensive,so a QUALITY exstension cord can be used so you don't have a power drop.

the alternator is a gm delco 10si or 12si used in chevys since 1960.

[turbineguy100]

whats the point of using 3 phase ac?

and what kind of alternator is that?

[67tr876]

@turbineguy100 Its better