ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3129)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3300)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13439)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2385)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (420)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (165)
 Instrumentation interview questions  Instrumentation Interview Questions (2399)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (107)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (80)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1203)
Question
why we use dc motor instead of ac motor?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Because dc motor have high starting torque than ac motor
so...
 
Is This Answer Correct ?    42 Yes 5 No
Navnit Bhimani
 
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 ?    37 Yes 2 No
E Venkat Reddy
 
 
 
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 ?    24 Yes 3 No
Sunil Guru
 
Answer
# 4
Because of high starting torque at verioues speed. 
Is This Answer Correct ?    13 Yes 3 No
Sudhir Patil
 
Answer
# 5
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 ?    3 Yes 0 No
John Davidson
 
Answer
# 6
Because it can be operated using rechargeable batteries, its easy availability and small size. 
Is This Answer Correct ?    1 Yes 4 No
Priyadarshi Pritam
 
Answer
# 7
along with poibilty of carrying small dc batteries 
Is This Answer Correct ?    1 Yes 5 No
Venki
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
What is difference between AC and DC resistance   7
What is difference b/w Microwave and OPGW ??   1
The ratio of white balls and black balls is 1:2. If 9 gray balls is added it becomes 2:4:3. Then what is number of black balls ? CTS 3
how does the harmonics enter into the induction motors?   1
what are the basic concept to design a out door Substation?   1
what are the advantages and disadvantages of oil filled cables over XLPE cables Areva 3
what is the difference between EMF and potential difference??   2
What will happen when a DC series motor suppllied by an AC source ?   2
why Ac current is alternating in nature?(or)why alternating current changes its direction? APGenco 3
IF i have switchgear with busbar current rating of 1000Amp 35kA then is it necessary to have outgoing breaker kA rating to be equal to busbar kA rating? L&T 5
what methods are used to improve power factor?   3
what condition there autotransformer will fail?   2
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com