| Sr. No.
|
Synchronous Motor
|
Induction Motor
|
| 1.
|
It is not self starting.
|
It is self starting.
|
| 2.
|
It run at constant speed known as synchronous speed.
|
Its speed decrease with load.
|
| 3.
|
The motor can be operated at all power factors whether lagging or leading.
|
The motor operates always lagging power factors only.
|
| 4.
|
It can be used for power factor correction in addition to supplying torque to drive mechanical load.
|
It can be used for driving mechanical loads only.
|
| 5.
|
It is made efficient than induction motor.
|
Its efficiency is lesser than synchronous motor.
|
| 6.
|
Cost is more.
|
Cheaper than synchronous motor.
|
| 7.
|
It has to be synchronized.
|
Induction motor is not be synchronized.
|
| 8.
|
Its construction is complicated.
|
Its construction is simple.
|
| 9.
|
The synchronous motor has a tendency to hunt.
|
They do not hunt.
|
| 10.
|
The motor requires a D.C. exciter.
|
No exciter is required.
|
