محرك كهربائي غير متزامن

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

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

synchronous generator or Alternator: Main workhorse of the power generation industry; they are rotated mechanically by a prime mover at synchronous swiftness and it creates three phase electricity. Picture of PMA found in cars:
2. Synchronous motor: These are constant speed three phase machines capable of working at synchronous acceleration. They are mostly found in constant speed mechanical drives. They are better 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 acceleration i.electronic. 3000 rpm. This is محرك 12 فولت achieved through unique constructional features in production this types of machines. There is no slip in synchronous devices like normal induction motors.

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