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