Permanent Magnet Motors Animated

by: Douglas W. Jones
University of Iowa Department of Computer Science Copyright

Here is Figure 1.2 in animated form: 
Figure 1.2 

        You'll need a brouser that
        can handle animated GIFs here
In looking at this figure, note the following:
  1. This 6-pole rotor turns in a direction opposite the rotation of the stator field; a two-pole rotor inside the exact same stator would rotate with the field.

  2. This illustration is based on half-step control, where alternate half steps involve one and two motor windings.

  3. It takes three complete cycles of the control system to turn this 6-pole rotor one revolution. A two-pole rotor would turn a full revolution per control system cycle.
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