Three phase synchronous motor

Electrical machines are categorized into two..

Motor.
Generator.
There are two types of motor.

AC motor.
DC motor.
There are two kinds of three phase motor.

Synchronous motor.
Asynchronous motor.
The basic difference between asynchronous and synchronous electric motor , slip presents in asynchronous motor .At running condition slide of an asynchronous motor lies from 0 to at least one 1. . In asynchronous motor both starting and 12v Motor operating torque is required. Asynchronous motor has moderate starting torque . Asynchronous motor is definitely a single fed motor.In asynchronous engine field is stationary armature rotates .

Three phase synchronous machines have a stationary three phase armature and a wound rotor. They are of two types:

synchronous generator or Alternator: Main workhorse of the energy generation industry; they are rotated mechanically by a primary mover at synchronous swiftness and it generates three phase electricity. Image of PMA found in cars:
2. Synchronous motor: They are continuous speed three phase machines capable of running at synchronous acceleration. They are mostly found in constant velocity mechanical drives. They are more efficient in comparison to induction motors.
A synchronous machine has derived its name from the idea that the rotor will rotate in synchronicity with the rotating magnetic field.

In other words, for a 2 Pole machine (electric motor) the rotating magnetic field rotates at 3000 rpm; the rotor of synchronous machine also rotates at the same rate i.e. 3000 rpm. This is achieved through special constructional features in manufacturing this types of machines. There is no slip in synchronous machines like regular induction motors.

Normally three phase supply is available commercially and the design is also meant for the same. That is why ‘three phase’ is usually added with synchronous machine name.