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

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

Question Posted / kumar

2 Answers
7407 Views
I also Faced
E-Mail Answers

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

explain transformer ct connection?

0 Answers

what is the function of cooling tubes in transformer

4 Answers

what is meant by motor protection relay & its working principle ?k

1 Answers Pricol,

How regulator control the fan speed?

4 Answers

what is the meaning of 1250 KVA Trasformer

2 Answers

When neutral is grounded in electrical circuit?

9 Answers Balco,

i want to know how to calculate the battery capacity based on the UPS . ex i want to run have one kva UPS Which should run 10 hours ? in that case how many batteries to be installed and what will be the AH Value .

2 Answers

Why usually in all electrical equipment taking more current in Y pahse like pumps,compressor,or any other applications

1 Answers

if only one generator is running in droop mode parrallel with grid and suddenly grid breaker off what will happen? It will trip o/u freq or stay as it is? (urgent)

10 Answers

which oil is used in transformer?

7 Answers

A 4-Pole D.C. Generator has a speed of 1500r.p.m. Then what will be the frequency of D.C. Generator ?

9 Answers IBM,

What is ahu ? Working principal.

0 Answers Sodexo,

For more Electrical Engineering Interview Questions Click Here