Rotating Magnetic Field
Suppose to have three windings , and with axes displaced by 120° around the origin and supplied with three sinusoidal current , and 120° lagging phase displaced with respect to each other (see left part of the diagram). Selecting check boxes A, B and C and moving the slider "ELECTRIC ANGLE" you'll see how the corresponding magnetic fields , and evolve.
If you select the "view resulting field" check box, you'll see the resulting magnetic field with constant amplitude (3/2 of the maximum field amplitude of a single winding) rotating around the origin.