The advantages of rotating field system are given below.
a. For rotating field alternators only two slip rings and brush gear assembly are required irrespective of number of phases.
b. The DC excitation voltage is low and it is very easy to insulate. This intern reduces the size of the machine.
c. Out put current can be taken directly from the fixed terminals on the stator. It is easy to insulate high voltage stationary stator (armature).
d. The armature winding can be easily braced to prevent any deformation produced by the mechanical stress set as a result of short circuit current and the high centrifugal brought into play.
