For the same power rating,which motor is bigger in size,AC or DC?

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Question Posted / niks_4u86

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For the same power rating,which motor is bigger in size,AC or DC?..

Answer / oasis.enigneers@yahoo.com

The DC motor is biger then AC in size..

Is This Answer Correct ?

60 Yes

6 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / navaneetha

I think DC motor is bigger then AC in size..because as the
voltage is increased, the commutation, and sparking at
brushes increases.

Is This Answer Correct ?

15 Yes

5 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / kapil pandey

In AC- P = Root3 *V*I (for 3 phases) [ 3 core windings]
In DC - P= 3*V*I (for 3 phases)[6 core windings]
means for getting power sqroot3 times we have to wound
double. making the DC motor size bigger.
one more thing that the loss arresting system & protection
system shall also be bigger in case of DC.

Is This Answer Correct ?

8 Yes

3 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / nishant

i dink dc motor will be large ...bcz it require large conductors and large insulation bcz of a large dc .......

Is This Answer Correct ?

2 Yes

0 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / m tashfeen abbasi

The Dc motar bigger in size because the DC moter consist of Armature winding with commutater and inter pole winding, field winding and shunt winding

Is This Answer Correct ?

2 Yes

0 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / rabisankar

For 1phase AC machine P=v*i*cos (thita).
For 1phase DC machine P=v*i.
now cos(thita)<=1.
so for same power rating ac machine must have larger i than dc.
so thick conductor is required,so its size is larger than dc
machine.

Is This Answer Correct ?

0 Yes

8 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / mahesh

i think dc motor is smaller than ac its because in dc motor we can directly take the current from armature where as in case of ac motor it is taken from brushes and slip rings and extra components may include so the motor size is more for ac and it is less for dc

Is This Answer Correct ?

1 Yes

10 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / sunny

AC motor will be of bigger size because of the alternating nature of current to reduce eddy currents core is laminated & also the outer frame has given a shape for max. surface area to dissipate heat.

Is This Answer Correct ?

2 Yes

12 No

For the same power rating,which motor is bigger in size,AC or DC?..

Answer / niks_4u86

i think it has to be AC as to reduce the reluctance for flux the air gap provided gets the size of AC motor greater than the size of dc motor insulation

Is This Answer Correct ?

9 Yes

24 No

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