Answer / chandru

Yes,back emf should be there to run it as an induction
motor.Normally what will happen is, when you give 3 phase
power to stator,rotating magnetic field(rmf) will be
created over it.Inturn,this rmf will induce an emf in rotor
side.According to lenz law,obviously this induced emf will
oppose the cause that produces it.Here, the cause is
relative motion between stator's rotating mag field and
rotor speed.Normally,we will call it as slip.So, it will
try to make that relative motion to zero.Due to this
operation, induction motor will rotate.If suppose,rotor
speed catches the stator's rmf,induction motor will
stop.Finally, the main thing to note here is that, it wont
run without slip.

Differnce between Analog & Digital

1 Answers  

---

What are the fire Estingushers use in electrical fire?

3 Answers  

---

if u have to run a 300kw moter then what is ur choice HT or LT switchgear & explain why?

3 Answers   Aditya Birla,

---

How to test the Secure Elite 440 Multi function meter working condition.

0 Answers   Sadanand Constructions,

---

what is frequency transformer?

2 Answers  

---

why a single phase induction motor has poor power factor

0 Answers  

---

when neutral will carry the current?what could be the magnitude?

7 Answers   Voltas,

---

use of PIR in ehv breaker

0 Answers  

---

any one have papers of hpcl or sailof ELECTRICAL ENGG.

1 Answers  

---

what deffrence between KW $ KVA ?

7 Answers  

---

what should be the no load current for 3 phase ac motors ranging from 5 kw to 1000kw?

0 Answers  

---

IN 6.6KV 3 phase switch gear .i will give 6.6kv to R phase only to earth in during H.v testing (through H.v KIT).what happen remaining phases.how much voltage get remaining phases.why? explain.

1 Answers  

---