Answer / avnish sharma

1. check out for Brushes. If Brushes are there then it is for sure DC motor. If not then

2 Cooling fins for ventilation are to be checked. if cooling fins are there, then it is AC motor.
Cooling fins can be seen from a long distance also as it is external....

Answer / hemang

basically main diff between AC and DC motor are
1.DC motor having commutator,carbon brush and heavy
weight,big motor instead of same KW and rating of AC motor

Answer / manoj

To check it physically check the following
1. starter mostly frequency based starter for AC motor to
acheive energy saving
2. connection : AC has star/delata wnding connection
3. Dc motor always have carbon brushes
4. Dc motor is used for constant torque application.
5. Ac motor has Rotor and DC has Armature

Answer / abel akponah

DC motor has commutators, with segment, brushes and its
holders and a rewound rotor known as armature.
while AC motor has stator and rotor sometimes rewound rotor
with slip ring on the shaft

Answer / n.veeratejeswar

For dc motors the outer part of stator surface is smoothly
and for ac motors there is a numbber of fins parallel for
cooling purpouse

Answer / arun

D.C motor can be differentiated by means of its rotor part.
Because of rotating magnetic field A.C motors will have
mostly squirrel cage rotors.

Where as all D.C motors will have slip ring brush
arrangements in its rotor.

Answer / vikas

we can check the dc and ac motor by just seeing from
outside.....if we carefully see the outer perifery of both
the motor then dc motor have bolts mounted outside through
which poles are connected in stator but this is not the case
of ac motor....so we can differenciate...

Answer / abhishek kumar

In all dc motors
there is a
commutator
found for
operation.but ac
motors have no
comttr foun for
its work.

Answer / namo narayan singh

DC MOTOR having commutator segment,carbon brushes with
holders,
AC MOTOR having wide use of squerrel cage rotor, large in
size,

Answer / babilla

in the dc motor direct current is given.
in case of ac motor it works on the induction principle.
only in ac squirrel cage & slip ring IM

How to check the LM324 Ic

0 Answers  

what r the preventive maintenance of air compressor

1 Answers   Jindal,

Tell the details of the precommissioning tests that are performed on distribution transformer, power cable and switchgear (11kv).

1 Answers   Reliance,

How to earth the star delta connected transformers?

1 Answers   UPPCL,

How to select a cable size according to load

1 Answers   Red Bull,

AC voltage only create magnetic flux in coils, but in Solenoid coil how 24V DC volt create flux and pick the plunger

5 Answers  

can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?

2 Answers   Maersk,

how fan speed decrease or increase by using regulator? thank you

3 Answers  

what is the difference between a feeder and a cable?

3 Answers  

keeping in view of parallel operation which of the 3 phase transformer connection are possible? a)delta-delta to delta-star b) delta-delta to star-delta c) star-star to delta-delta d) delta-star to star-delta

4 Answers   Ecil, Siemens,

In a poly phase circuit if clamp on meter shows same load on three phases and their sum on neutral then why we use three and a half core cable or maximum the same size of core as that of phase?

1 Answers  

a 3 phase motor was running with delta connected, suddenly one phase winding got burnt off, what will be the effect ?

8 Answers   Bhel, RRB, SR,