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Question
what is a universal motor? how it works?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Universal motor is a motor, it can run both AC & DC Supply,
it operate with three kind topology.
1. AC drive with TRIAC,
2. DC drive with Traic,
3. DC drive with IGBT,
 
Is This Answer Correct ?    21 Yes 5 No
Rajilatha
 
Answer
# 2
Universal motor is a motor, it can run both AC & DC Supply,
it contence carbon bruses, example of motor is we use at
home mixer cum grinder.
 
Is This Answer Correct ?    17 Yes 1 No
Anil Bhatia
 
 
 
Answer
# 3
universal motor is a AC series motor .. it has capability to
work for both as and dc supply .
it can rotate with very high speed nearly 3600 RPM to 25000
rpm. Its the only motor which is having high range of speed
the main applications of this motors are
electric shavers,electric hand drillers.office machines
etc
these motors are avilable from the range 1/4 HP to 3/4 HP
 
Is This Answer Correct ?    7 Yes 5 No
Venkatesh Naik
 
Answer
# 4
Its a motor is work in both DC and ACsupply. 
Is This Answer Correct ?    4 Yes 2 No
Boopathi
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
What is ferrite affects and what is disadvantage of ferrite affects.   1
what is meant by slip & where its occur ? Lanco 5
IN 500 KVA TRANSFORMER 11KV/415 VOLTS HOW TO CALCULATE THE HT CABLE SIZE AND LT CABLE SIZE FROM TRANSFORMER TO LT PANNEL. AND HOW MANY MAINSWITCHES OR MCBS WITH RATING ARE TO BE PROVIDED Bsf 2
without any theoretical calculations, can u approximately tell the current rating of a motor(above 30hp)working at 415VAC.   7
WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.   2
What is Grounding? any difference b\w earthing? if yes plz explan?? ABB 3
why single phase induction motors are not self staring ? how can we start the 1-phase Induction motor ? BDL 3
Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million   2
We have a bank capacitor rating of 60 KVAR for a overall load of 160 KVA and we have connected three loads of 50KVA each. We would like to auto matically correct PF using APFC. How do we design it?   2
galloping in transmission line is due to DVC 2
in 5 mva transformer 33/11 kv s/s what rating of capacitor bank is required & what is the fourmula for rating   6
a 11 kv line is grounded and a 110 kv line is grounded. which line have the greater current flow?   4
 
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