Communiquez avec les autres et partagez vos connaissances professionnelles

Inscrivez-vous ou connectez-vous pour rejoindre votre communauté professionnelle.

Suivre

What is the difference between induction machine and synchronous machine?

user-image
Question ajoutée par Muhammad Fahim , Assistant Professor , Sarhad University of Science & Information Technology, Peshawar
Date de publication: 2016/03/24
Mohammed Azmath Ali Mohammed
par Mohammed Azmath Ali Mohammed , site engineer , Enrun india pvt ltd

1.Induction machine is a self starting machine and synchronous machine is not self starting machine 2.Induction machine rotor rotate bolew synchronous speed and synchronous machine rotor rotate synchronous speed

MOHAMMED YOUSUF ALI
par MOHAMMED YOUSUF ALI , Electrical Engineer , AL-AWTAD NATIONAL CONSTRUCTION CO., LTD.

Synchronous Motor:

1.                   Speed: Starting from its name ‘synchronous’, this motor runs at synchronous speed whatever the amount of load it may be. The speed of this kind of motor is not dependent on the load.

2.                   Starting Torque: This motor does not have any self-starting torque, so some other auxiliary means have to be provided for starting the synchronous machine.

3.                   Excitation: Synchronous motor is a doubly excited machine. The field winding that is rotor is excited using DC source and its stator that is armature winding is excited using AC source. In addition to that it can be made to operate at leading power factor from lagging power factor just by changing its excitation.

4.                   Efficiency:  This is comparatively more efficient than induction            motor.

 

5.                   Cost: This kind of motor is much costlier that a similar rating

 

induction motor.

 

1.                   Speed: The speed of induction motor is always less than the synchronous speed and it is dependent on the load since the speed decreases with the increase in load.

2.                   Starting Torque: This kind of motor has its own self-starting torque.

3.                   Excitation: It is a singly excited machine where its stator windings are excited using an AC source. Contrary to the case of synchronous motor, induction motor works only under lagging power factor.

4.                   Efficiency: It is comparatively less efficient.

 

5.                   Cost: The cost of induction machine is less when compared with a synchronous motor of same rating.

Shahed Ali Mir
par Shahed Ali Mir , Project Engineer , Saudi Electricity Company

Synchronous machines run at constant speed but the induction machine can operate at different speeds.

mahmoud arabi
par mahmoud arabi , Senior Design Engineer , Schneider

induction machine can't run at synchronous speed it always low little bit ,contain only one source of electric required for motion

while synchronous one rotates at synchronous speed contain of DC source at rotor and ac at stator to start rotation

 

More Questions Like This