Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...


if dc motor can operate by ac supply ? if its possible
means how ?

Answers were Sorted based on User's Feedback



if dc motor can operate by ac supply ? if its possible means how ?..

Answer / rahul ganthade

It depends on whether the field winding of the dc motor is
connected in series or in shunt with the armature
winding.If it is connected in series,the motor will rotate
since the torque,which varies as the product of the
armature and field current is always positive.Thus,a
positive average torque causes the motor to rotate,however
the pulsating nature may cause the commutator segments and
brushes to wear out.
Thus only small sized dc motors may be used with ac supply.

Is This Answer Correct ?    2 Yes 0 No

if dc motor can operate by ac supply ? if its possible means how ?..

Answer / rafi

Yes, it is possible,

irrespective of ac or dc, the current flowing at any point
of time in the rotor and stator in dc motor will produce
the torque in same direction.

try reversing the polarity of DC supply for a dc motor, it
will rotate in same direction. Applying AC supply is
similar to reversing the supply polarity 50 times in a sec.
so even if you apply AC the motor will run in same
direction.

I hope this clarifies the query

Is This Answer Correct ?    3 Yes 8 No

Post New Answer

More Electrical Engineering Interview Questions

How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

0 Answers   L&T,


Why HT voltages are expressed in 11KV,22KV,33KV and so on? (ie in times of 11)

3 Answers   Bhel, Park Hotel,


What sort of protection scheme do you suggest for the protection of a 10 HP motor?

1 Answers   Chevron,


Even when a particular generator in a generating station is under maintenance we are still able to maintain the same power output. How is this possible? Does the tie line between 2 generating stations have a role to play in it?

1 Answers   NTPC,


what is the practical application of full adder circuit?

0 Answers   College School Exams Tests,






how calculate the electrical load for industry and office

2 Answers  


What is the difference between cylindrical-type and sandwich-type winding?

0 Answers  


why we use sinosidal voltage / current instead of others in system?

0 Answers  


the power loss in an overloaded line is mainly due to? a. resistance b. capacitance d. inductance d. none

4 Answers  


can we use trip light with bus coupler?

0 Answers  


We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?

1 Answers  


Name two types of electrical analogous for mechanical system.

0 Answers  






Categories
  • Civil Engineering Interview Questions Civil Engineering (5075)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4444)
  • Electrical Engineering Interview Questions Electrical Engineering (16600)
  • Electronics Communications Interview Questions Electronics Communications (3915)
  • Chemical Engineering Interview Questions Chemical Engineering (1092)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (214)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (258)
  • Instrumentation Interview Questions Instrumentation (2987)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (123)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (0)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1377)