Answer / bijay

V = 4.44 F X PHI X N

TO INCREASE V AT F=50HZ,
SPEED OF GENERATOR IS INCREASED WHICH INTURN WILL INCREASE
THE FREQ. ALSO.
FOR THIS REASON DROOP CURVE IS FOLLOWED.WHICH PROVIDES A
STABLE SYSTEM.
FOR MORE EXPLANATION REFER BOOKS ON GENERATOR STABILITY

Answer / felixraj

it is necessary to maintain in all magnetic circuit to avoid
saturation.

Answer / gbs

V/f determine the overfluxing condition..
normally its used for over excitation condition in generator protion. if v/f increases core will saturate.

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