A three-phase synchronous generator has a synchronous reactance of 50 Ω/phase. It is connected to an infinite bus of line voltage 15,000 V , and it develops a total power of 5 MVA supplying with unity pf. If the armature voltage of the generator is increased by 15%, while the input power to the generator remains constant, determine the new power factor and the apparent power supplied to the grid.it supplies to the network.

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Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.