The following are the main comparison between Synchronous Motor & Induction Motor
| Sr. No. | Synchronous Motor | Induction Motor |
|---|---|---|
| 1. | It is not self-starting. | It is self-starting motor. |
| 2. | It runs at a constant speed known as synchronous speed. | Its speed decrease with load. |
| 3. | Its speed decreases with load. | 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. | Its construction is complicated. | Its construction is simple. |
| 6. | The motor requires a D.C. exciter. | No exciter is required. |
| 7. | It has to be synchronized. | It is not be synchronized. |
| 8. | It is not synchronized. | They do not hunt. |
| 9. | Cost is more. | Cheaper than a synchronous motor. |
| 10. | It is more efficient than an induction motor. | Its efficiency is lesser than synchronous motor. |
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