3 phase

[GeeMac]

I am putting together my first 3 phase stator. I only have 8 magnets. Will that work correctly. If not what should I do?

[Kevin L]

Checkout these posts first.

http://www.fieldlines.com/story/2004/1/11/0022/78182

[hiker]

you could do a 8 mag and 6 coil combo..

2 coils per phase..

single rotor--with lams behind the coils..

 heres a shot of a little 8 and 6 dual rotor mill i did a while back..

[Devo]

What size & strength are your magnets?

Devin

[GeeMac]

Please see my diary

[CmeBREW]

Hello Geemac,

      It is good to see you are actually trying and Doing the projects. Thats the only way to progress.  Once you understand the basic principle of how 3-phase 'works', you will be on your way.

If you only have 8 magnets then you MUST have only 6 coils -- in order for it to be 3-phase. (that would be 3 sets of coils/ 2 coils per phase)

The most common 3-phase combo though is 12 magnets and 9 coils. (3 sets of coils/ 3 coils per phase)

Or you can do 16 mags to 12 coils.(3 sets of coils / 4 coils per phase)

Or you can do 20 mags to 15 coils. (3 sets of coils / 5 coil per phase)

All of these are still 3-phase alternators, because there are always only 3 SETS of coils.

The following is a diagram picture of the most common 3-phase combo, the 12mag to 9 coils. It helped me to understand the principle of 3-phase.

The drawing is from TITANTORNADO -- and I just added the red arrows and words at bottom:

So as you can see, you MUST have the correct number of magnets to the right number of coils for it to work correctly. Also, the SPACING of the magnets AND the coils has to be exact in order for it to work right, and to avoid CANCELING out some or ALOT of your power.

It looks like your magnets are 1" diameter by 1/8" thick.  It would do at least TWICE the power if you could do a DUAL rotor alternator.

Here is Danb's wiring diagram for the common 12 magnet / 9 coil  alternator.





You can also read about it here:

http://www.otherpower.com/trips2.html

With 3-phase, make sure ALL the coils (winding direction) go in the same direction!

Single phase can confuse beginners because the coils (winding direction) ALTERNATE directions. That is, one coil goes clockwise and the next coil to it goes counter-clockwise, and so on.  Therefore, DO NOT FORGET, that the coil (winding direction) for single phase and 3-phase are DIFFERENT.  That can mess beginners up when they progress to doing 3-phase.

-Hope this helps. I don't have anymore time to think of anything else.  

P.S. If i said anything incorrect, please let it be known now to avoid confusion!!

[CmeBREW]

I better clarify something better:

When I said:

"The most common 3-phase combo though is 12 magnets and 9 coils. (3 sets of coils/ 3 coils per phase)

Or you can do 16 mags to 12 coils.(3 sets of coils / 4 coils per phase)

Or you can do 20 mags to 15 coils. (3 sets of coils / 5 coil per phase)"

(The above is true if you only use ONE SINGLE rotor.)

I should have used the word "POLES" instead of "mags"

To be more clear, It should say:

"The most common 3-phase combo though is 12 POLE (12mags PER rotor) and 9 coils. (3 sets of coils/ 3 coils per phase)

Or you can do 16 POLES (16 mags PER rotor) to 12 coils.(3 sets of coils / 4 coils per phase)

Or you can do 20 POLES (20 mags PER rotor) to 15 coils. (3 sets of coils / 5 coil per phase)"

Sorry about that.

[tmac]

"you could do a 8 mag and 6 coil combo..2 coils per phase..single rotor-"

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Would it be possible to do a 3 coil, 1 coil per phase, dual rotor with 8 magnets?