Answer / masoom raza

synchronous motor and generator are same i.e
constant speed type machine but only difference
is that motor consume power and generator produce
power .it is doubly excited.
where induction motor is asynchronous machine.
its singly excited.

Answer / hussain

synchronous motor and generaor are constant sped machines
where as induction motor is variable speed machine.

Answer / lakshmiprasad

synchronous motor and generaor are constant sped machines
where as induction motor is variable speed machine.

Answer / pradyumna chandra panda

Induction motor is easily self started and it's speed is variable which is less than synchronous speed and motor leg the current behind the voltage ie poor power factor. In simple Synchronous motors are not self started (they are self started by Drive) it's speed is equal to synchronous speed and the motor maintain approximately unity power factor ie not legging.

Answer / chaitanya

induction motor is generally treated as rotating transformer becoz its working principle is same as transformer(mutual induction) and the I.M is of rotating...where as in synchronous machines the magnetic field is rotating and the speed will be constant which is not constant in the case of induction motor!!

Answer / b.arun prashanth

A synchronous motor and generator are constant speed machines and they are doubly excited machines where dc supply has to be given to the rotor ! and an induction motor always runs in a speed less than the synchronous speed ! if it reaches the synchronous speed torque = 0 hence current = 0 and the motor wont run !

Answer / rajkumar

no idea

why the auxilary(starting)winding is provided in single phase inductoin motor?

5 Answers  

A system having the charactristic eqation (s+1)(s+2)(s-3)=0 is (a)stable (b)unstable (c)marginally stable (d)critically stale

1 Answers  

what is meant by unity power factor?unity means one why dont call 2,3,4......?

6 Answers  

in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

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0 Answers  

What is mean by discrimination of circuit breaker ?

1 Answers  

How does frequency affect KVA rating of a transformer? If a 500 kva, 400 v, 60 hz t/f is to be operated on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same Also explain why do u think like that.

8 Answers  

why are the maintaine power factor and how can this control and this is how work.

0 Answers   Mukand,

WE HAVE A PROBLEM THAT THE MAIN DRIVE OF OUR CEMENT MILL HAS AN EARTHING PROBLEM?TWO OF STATOR WINDINGS INSULATION HAS BEEN COLLAPSED DUE TO AGING PROBLEM.THE PHASES HAVE BEEN BYPASSED AND NOW THE LOAD HAS BEEN INCREASED.WE CAN'T REPLACE THE MOTOR.KINDLY HELP ME BY GIVING SUGGESTION THAT HOW TO MAINTAIN THE STARTING TORQUE AND CURRENT FOR HIGH LOADS.

1 Answers   ACC,

what is the other name of dc series motor

2 Answers  

without any excitation we can strt any dc or ac moter?

6 Answers   Bhel,

How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?

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