Am I canceling output of my stator with these connections

[methanolcat]

      I wasn't real sure which section to post this question, so probably "newbies" since it would apply to many newcomers as well.

    I copied some of this website's "3_phase_basics" 2 years ago and put it into a folder I made up.

     This web site seems to have changed a bit which makes it harder for me to explain my question.

http://windstuffnow.com/alt_from_scratch.htm

   If you scroll down to the star wiring diagram showing the Green, Blue, Red 3-phase windings it shows A,C, and E as outputs and B,D, and F as the star connection point.

   The literature I copied 2 years ago for my own use says "The reason E is an output or ends up being a "start" wire is because when the magnet passes over the 2nd phase it's out of phase between the 1 and 3 so the ends are reversed instead of winding them in the opposite order."

  I wound all my coils the same direction and put them all in the mold the same way, connecting "start" to "end" in each phase then brought all 6 remaining leads out of the stator for connection there.

  I labeled my windings "starts" A,B, and C, and "end's" D,E, and F but when I did a voltage test I connected D,E, and F together as my star connection point.

    So my question is "do I have my stator leads connected wrong and am I canceling out some of my output connecting the way I did?"  

   If it is connected wrong how do I know which phase winding is my "2nd phase"

 I'm totally confusing myself at this point, maybe I have too much imformation.

  HELP please, So am I wired wrong?

     Matt

[finnsawyer]

If the three voltages really satisfy the three phase relationship (same peak voltage and 120 degrees out of time phase) it shouldn't matter which lead is start or which lead is connected to the star connection.  One thing you could try is to connect the three phases in series (don't close the loop) and measure the resulting voltage.  With true three phase that voltage should be (very nearly) zero.  If it's not, you have a problem with the coil to coil connections.  Well, I'm assuming you get some voltage per phase to start with.

[methanolcat]

   Thank's finsawyer

     Yes I get voltage per phase, all equal within reason, and actually alot more than I had thought that I would using ceramic magnets, but I wanted to make sure I was getting all I could and wasn't canceling any out.

    I now see more than I had before on my home computer since I'm at work on high speed, I think my browser must have been timing out while I was at home, anyhow when I click the link here at work pictures come up as well showing OVERLAPPING COILS in his stator that I didn't get before and thats probably where the different connections would apply, and not to me since mine don't overlap each other.

    Confusion cleared up, at least on my stator anyhow.

Thanks again

       Matt

[Darren73]

Getting one phase wrong results in a loss of output as can be seen in the two photos below with the rectified voltage shown in light blue, the first showing the correct output and the second with the yellow phase reversed.

There are high quality copies are in my files if these are not clear enough.

proper star connections

Yellow phase connected wrong

Regards

Darren

[Devo]

That drawing on three phase hook ups at ED's site buggered me up a while back as well so I E-mailed him.

That is for true 3 phase over lapping windings. the kind you do on the wind genny's here is for lack of a better term a "fake" three phase-no coils overlap & therefore  if you had coil 1 as a/b coil 2 as c/d  & coil 3 as e/f all coils wound the same way the leads a/b/c could tie & b/d/f be outputs or the exact opposite.

On Ed's example if the second phase of the overlapping 3 phase machine was wound backwards than the leads would be the same as described above.

Ed if your reading this you should change that darn page to clarify it-LOL. It causes some confusion as alot of people frequent your site for formula's(me :-) )but arent using true 3 phase...

Devin