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Relation Between Electric Frequency and magnetic field rotation speed in a motor

  1. Oct 26, 2014 #1
    Hi!
    I understand that if you have a stator with a a three phase electric signal going into it, both the frqyency and angular velocity of the magnetic field and the electric entry will be the same. Now when you feed it with 2 groups of three phases electric signals you get four poles, or at least that is what the book says. Why does that happen. Why does one pole only go half the way and the other one the other half. I can't quite grasp that idea.

    Thank you
     
  2. jcsd
  3. Oct 27, 2014 #2
    Chaca, good question. But each of the three phases is in its own winding. The windings are 120 degrees apart physically (rotationally), too. It is not one winding. I have some stuff I used to teach around here somewhere, if you want help in visualization.
     
  4. Oct 27, 2014 #3
    That'd helpful! Thankyou
     
  5. Oct 27, 2014 #4
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