Answer / rahul

depends on type of d motor..i.e. it's construction.
A PMDC motor will not run on AC.
A shunt wound motor will not run on AC. There will b heavy
heating that may cause damage.
A series motor functions as Universal Motor and hence will
run satisfactorily on AC.

Answer / f1_match

k but in this case, what will happen to the motor
windings? how about the protection system whether it will
act during this condition?

Answer / rahul

luk...of course the performance is gonna b inferior as u may
know the differences b/w universal motor and dc
motor...Eb(back emf) will b less for ac..so less o/p power

Answer / velpula.nagarjuna

in dc motor when we give ac supply to the armature then the motor is not run. because the direct flux produce from the permanent magnets, but from the armature winding the alternating flux is produced.that means the flux is rotated continuously.the the polarity of the armature flux continuously changes... the the aiding of the flux is not possible..with out aiding of the flux no torque will be produce..no torque means no rotations...that means the hunting will be processed........

what is load cell

3 Answers   TATA, Wipro,

---

Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

1 Answers  

---

At which time Synchronous generator act as a Synchronous Condenser?

4 Answers  

---

The objective of connecting a resistance and capacitance across gate circuit is to protect the SCR against

2 Answers  

---

can any one help me for my ups inter view , list out few basic technical ups question with answer.

1 Answers  

---

AIR GAP IS TERMED AS USEFUL. WHY?

5 Answers  

---

what is the difference between squirrel cage & slip ring induction motor by construction & working principle ?

1 Answers   Sail,

---

why rating of generator is kva but motor is kw ?

4 Answers  

---

why earth fault current is always less than the o/c

2 Answers  

---

what is the purpose for open delta connection in potential transformer

2 Answers  

---

How to calculate voltage drop loss in HT 11000 Volts XLPE Aluminium conductor cable. Any specific formula or Thumb rule

2 Answers  

---

What are the methods used to improve powerfactor ?

6 Answers  

---