Answer / mallikarjun n

nothing doing...if we give dc supply,o/p will be 24vplts..
if ac,o/p will be 230 volts.if we give ac,motior will run
at const speed.if we give dc,it wil start at 50rpm and
gradully increase 2 160rpm,if it crosses rated rpm winding
will burn will more spark induction takes place..
so dont give ac supply 2 dc motor.be careful

Answer / maulik

motor willl run but it will run with reduce speed and also there is a spark in the motor

Answer / nagarjuna

the motor wil not run

Answer / karthik.n

Because of the presence of low resistance in DC motors. The
motor will not with stand the AC current voltage so the
motor burns after working for some desired period.

Answer / mahender

if dc motor is shunt type, then it will rotate.But, if it is
separately excited dc motor then, the motor will not rotate
due to quick change in its direction per every cycle.

Answer / aniruddh

AC apply to DCmotor frequency dependent losses increse
(eddycurrent&core)losses
motor gives less output

Answer / sam khanji

The Motor will run only on the positive side of the Ac
wave .so it will run and stop then run again and stop again.
but if the volume of the AC is high, then the winding will
be burned due to the high frequency exposed to

Does the hysteresis loss is due to retentivity property of the material? or it is due to reluctance property?

2 Answers  

What should be value of Circuit breaker operating time and tripping time?

5 Answers  

In a synchronous machine if the field axis is ahead of the armature field axis then the machine is ?

1 Answers  

How big (size) can the tertiary winding be in transformer? Can we load the tertiary winding, if yes then how much we can load it?

1 Answers  

How to operate a ac chilar plant?

0 Answers  

What was the Dg set radiator and lube oil temperatures trip in ACB

0 Answers   Gland Pharma,

does any one know where we can purchase insulation oil for high voltage oil filled cables

0 Answers  

how and where does star and delta connection is used ?

2 Answers  

Can anyone tell me what will happen if AC & DC supply get mixed???

9 Answers  

is electrons really flow or they just vibrate at their position?

5 Answers   Bhel, HAL,

If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB? Explain in detail.

0 Answers   Usha Capacitors,

I have 90KW Motor 60 Hz,380V Pf 0,88. after testing the Motor without Load is the no load Current 36 A,but wenn i put load after 2 hours the current increase more than 156 A. Can anybode tell me waht is the Problem?

4 Answers   ABB,