Three phase synchronous motor

Electrical machines are classified into two..

There are two kinds of motor.

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

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

Three phase synchronous machines have got 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 prime mover at synchronous rate and it generates three phase electricity. Image of PMA used in cars:
2. Synchronous motor: These are continuous speed three phase machines capable of operating at synchronous velocity. They are mostly found in constant acceleration mechanical drives. They are more efficient compared to 12v Motor induction motors.
A synchronous machine has derived its name from the idea that the rotor will rotate in synchronicity with the rotating magnetic field.

Simply speaking, 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 quickness i.e. 3000 rpm. This is achieved through unique constructional features in production this types of devices. There is no slip in synchronous machines like normal induction motors.

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


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