In a synchronous generator, a DC current is applied to the rotor winding producing a rotor magnetic field. The rotor is then turned by external means producing a rotating magnetic field, which induces a 3-phase voltage within the stator winding. The rotor of a synchronous machine is a large electromagnet.

What is a synchronous generator state its working principle?

The synchronous generator works on the principle of Faraday laws of electromagnetic induction. Electromagnetic induction states that electromotive force induced in the armature coil if it is rotating in the uniform magnetic field. The EMF will also be generated if the field rotates and the conductor becomes stationary.

How does a synchronous work?

Synchronous simply means that the communications happen in real time, with all parties engaged simultaneously. Have you ever talked to someone on the phone or had an in-person meeting or conversation? Congratulations! You've engaged in synchronous communication.