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Question
why we use dc motor instead of ac motor?
 Question Submitted By :: Kamal_khattak
I also faced this Question!!     Rank Answer Posted By  
 
  Re: why we use dc motor instead of ac motor?
Answer
# 1
Because dc motor have high starting torque than ac motor
so...
 
Is This Answer Correct ?    40 Yes 5 No
Navnit Bhimani
 
  Re: why we use dc motor instead of ac motor?
Answer
# 2
due to high starting torque and smooth speed control these
motors are preferred in many application but in present
scenario all dc motors are replacing by electrical drives
due to development of power electronics like IGBT etc. the
DC motor requires high maintenance compare to AC motors and
with IGBT driven ac motors we can get smooth speed and
torque control.
 
Is This Answer Correct ?    35 Yes 1 No
E Venkat Reddy
 
 
 
  Re: why we use dc motor instead of ac motor?
Answer
# 3
EVEN NOW DC MOTORS ARE PROFFERED BECAUSE.....

1.HIGH STARTING TORQUE.

2.EASY CONTROL OF FIELD EXCITATION SO SPEED CAN BE
CONTROLLED

3.HIGH SPEED VARIATION IS POSSIBLE

4.BETTER STARTING AND BRAKING CHARACTERISTICS

used in lifts,hoists,cranes,traction systems........
 
Is This Answer Correct ?    22 Yes 3 No
Sunil Guru
 
  Re: why we use dc motor instead of ac motor?
Answer
# 4
Because of high starting torque at verioues speed. 
Is This Answer Correct ?    12 Yes 3 No
Sudhir Patil
 
  Re: why we use dc motor instead of ac motor?
Answer
# 5
along with poibilty of carrying small dc batteries 
Is This Answer Correct ?    1 Yes 4 No
Venki
 
  Re: why we use dc motor instead of ac motor?
Answer
# 6
Because it can be operated using rechargeable batteries, its easy availability and small size. 
Is This Answer Correct ?    1 Yes 3 No
Priyadarshi Pritam
 
  Re: why we use dc motor instead of ac motor?
Answer
# 7
With the advancement of AC drive technology AC motors can
do just about anything a DC motor can do. They can develop
full torque at zero RPM, once the holy grail of DC,have a
wider speed range, and amost zero maintenance requirments.
And to top all that from an intial cost stand point AC
motor/drive combinations are much cheaper. As for
industrail application, in the vast majority AC is the
prefered mehtod.
 
Is This Answer Correct ?    2 Yes 0 No
John Davidson
 

 
 
 
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