Answer / prmdptl2009

if an AC induction motor is applied with DC voltage,then due
to unavailability of change in flux as in AC,the induction
will not be possible. also in case of dc supply the motor
winding will not be able to withstand for long time and at
last the motor winding will be damaged.

Answer / suresh

if v give AC supply to motor it produce (RMF) rotating
magnetic field & according to principle it will run..
but in DC it will produce (SMF)static magnetic field due to
this the rotor cannot run & stater winding gets heated & burn..

why we are caling 440 volt 3 phase supply instead of 660 volt 3 phase supply? because each phase as a voltage of 220 volt. if anybody know the answer for my question please send it to my mail id. thank you.

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