Answer / jignesh parmar

IN MOTOR FLUX IS DIRECTLY PROPORTIONAL TO RATIO OF VOLTAGE
Vs frequency, i.e v/f it is derived from bellow formula
e= V = 4.44*flux*no. of turn*frequency
motor speed = 120*f/p
i.e speed can be ccontrolled by variying
frequency , but if only frequency increases then flux will
also increse,& flux increse beyond some level it cause
saturation also increse of flux increse loss, so to
maintain constant flux voltagge is also incresed in same
propotion to frequency as flux is directly proportion to
ratio of voltage/frequency i.e (v/f)
and that is called as variable voltage variable frequency
drive

Answer / nsnaidu

flux is directly proposnal to voltsge

Answer / kishore

flux is directly proposnal to the voltage.

hii this is ranjith from hyd... i want to know what type of questions they ask in interview...and hw the interview will go..? what subjects thay ask specially for electrical engg students?

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