Q. 47 A three phase slip-ring induction motor, provided with a commutator winding,
is shown in the figure. The motor rotates in clockwise direction when the rotor
windings are closed.
If the rotor winding is open circuited and the system is made to run at rotational
speed
with the help of prime-mover in anti-clockwise direction, then the
frequency of voltage across slip rings is
and frequency of voltage across
commutator brushes is
. The values of and respectively are
Answer:(A)
Explanation:
