Difference between Induction Motor and Synchronous Motor
Induction Motor :
An induction motor is also known as an asynchronous motor. It is a mostly used in AC electric motor. In this type of induction motor, the current in the rotor needed to produce torque is obtained via electromagnetic induction from the rotating magnetic field of the stator winding.
Synchronous Motor :
Synchronous Motor is the motor in which the speed of the rotor of the motor is the same as the rotating magnetic field.
There many differences between Induction Motor and Synchronous Motor which all are the differences are provided below which is more helpful to choose any one of them easily.
 |
| Difference between Induction Motor and Synchronous Motor |
Difference Point 1
Induction Motor: Does not require D.C. excitation.
Synchronous Motor: Requires D.C. excitation.
Difference Point 2
Induction Motor: Speed can be controlled but to small extent.
Synchronous Motor: Speed control not possible.
Difference Point 3
Induction Motor: Its speed falls with the increase in load and is always less than synchronous speed.
Synchronous Motor: Its average speed is constant and independent of load.
Difference Point 4
Induction Motor: It operates at only lagging power factor, which becomes very poor at light loads.
Synchronous Motor: Its torque is less sensitive to change in supply voltage.
Difference Point 5
Induction Motor: Its torque is more sensitive to change in supply voltage.
Synchronous Motor: Its torque is less sensitive to change in supply voltage.
Difference Point 6
Induction Motor: Breakdown torque is proportional to the square of the supply voltage.
Synchronous Motor: Breakdown torque is proportional to the supply voltage.
Difference Point 7
Induction Motor: More simple and less costly comparatively.
Synchronous Motor: More complicated and more costly comparatively.
Difference Point 8
Induction Motor: Employed for supplying mechanical load only.
Synchronous Motor: Employed for supplying mechanical load as well as for power factor improvement.
