Most important topics discussed about of Synchronous motor

Definition of Synchronous motor-:

A synchronous motor is a electrical machine it convert electrical power to mechanical power & when an alternator may operate as a motor by connecting its armature winding to a 3-phase supply then it is called a synchronous motor. These type of motor is operates at synchronous speed, & it is electrically identical with an alternator or a.c generator. When an alternator may operate as a motor by connecting its armature winding to a 3-phase supply.

Easily calculate Synchronous speed by this formula

Synchronous speed formula

50Hz Frequency is constant frequency in India.

And in rad/sec, we can be expressed in these form:- 


 Ns- Synchronous speed

 F- Supply frequency of the AC supply.

 P- Number of poles

Parts of synchronous motor

  1. Stator Part
  2. Rotor Parts

What is Stator of a synchronous motor-: 

Stator of a synchronous motor

This is outside part of the synchronous motor, which houses 3-phase armature winding in the slots of the stator core & received power from a 3-phase electric supply. Stator of the motor that create a magnetic field which rotates in time with the oscillations of the line current.

What is Rotor of a synchronous motor-: 


Rotor of a synchronous motor

This is inside part of the synchronous motor, a rotor which set of salient poles excited by direct current to form alternate North & South poles. The rotor with permanent magnets or electromagnets turns in step with the stator field at the same rate and as a result, provides the second synchronized rotating magnet field of any AC(Alternating Current) motor.


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