Answer / navnit bhimani

Because dc motor have high starting torque than ac motor
so...

Answer / e venkat reddy

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.

Answer / sunil guru

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........

Answer / sudhir patil

Because of high starting torque at verioues speed.

Answer / john davidson

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.

Answer / priyadarshi pritam

Because it can be operated using rechargeable batteries, its easy availability and small size.

Answer / venki

along with poibilty of carrying small dc batteries

what is the function of CRGO in a Transformer?

6 Answers  

I want to know if it is possible to use Variable Frequency Drive to reduce the current required for starting a motor?

3 Answers   Descon,

why rotor resistance starter is not suitable for squrielcage induction motor?why it is suitable for slipring induction motor?

5 Answers  

What is MSL designation of a motor and same may be provided in details.

0 Answers   DAE,

what is skin effect? why is it absentin dc system

22 Answers  

which part of transformer heats up the most and why? windings, core or oil .

3 Answers   Lafarge,

how much speed will trawiling current

3 Answers   TCS,

What are the advantages of speed control using thyristor?

0 Answers  

how to calculate the power loss of cable?

1 Answers  

An electric bulb giving light but at the time of lighting which one it takes? voltage or current

6 Answers  

we have one oven for 12 zone we are installed ir lamp in oven we control load from thyrister and 0 to 5vdc so our zone no 8 getting bright in fraction of second so what we do.. Please answer

0 Answers  

Draw the line diagram of diffretial relay connected to transformer?

0 Answers   NTPC,