FLUX PLOT
A rotating sinusoidally distributed winding is excited with a constant
current. The flux plot in the air gap also rotates. Where the lines are
crowded, the corresponding magnetic field density B is high, and where the
concentration of lines is reduced so is B. Thus the air gap B-field is sinusoidally distributed in space and is also rotating. It
can be represented by a rotating space vector of constant magnitude pointing to
where the field is maximum positive.
