Nov 27, 2019 · To find the effect of field current variation on synchronous motor we study given below figure. First, we suppose that the motor is connected with inductive load (lagging P.F) so if we increase the field current (I F) it effect is drawn in a given figure.

Synchronous generators or alternators are synchronous machines used to convert mechanical energy into electrical energy. Synchronous motors convert electrical energy into mechanical energy. A DC current is applied to the rotor winding which produces the rotor magnetic field.

A dc current must be supplied to the field circuit on the rotor. Since the rotor is rotating, a special arrangement is required to get the dc power to its field windings.

Nov 5, 2017 · V-curve and power factor control of generator are closely related to each other. V-curve of Generator is basically a plot of variation of armature current with the change in field current. For a constant power, V-curve can only be obtained for …

Power factor is the cosine between voltage and current in a sinusoidal AC circuit. Note that the power factor angle is controllable by the generated voltage E and hence by the DC field excitation.

Oct 23, 2022 · In a synchronous generator, a DC current is applied to the rotor winding, which produces a rotor magnetic field. The rotor of the generator is then turned by a prime mover, producing a rotating magnetic field within the machine.

This lesson covers the fundamental aspects of synchronous machines, focusing on their operation, features, and the impact of varying the excitation. It explains how the power factor of a synchronous machine can be manipulated by adjusting …

• In synchronous generators a stator (armature) winding produces voltage in response to a magneti fi ld d d h t i di itic field produced when a rotor winding is “excited” by field current • Increasing field current increases the magnetic field resulting in increased voltage • Adding load to the generator changes the amount

Synchronous machines are similar to DC machines in that: they have a field winding and an armature winding; a dc current is passed through the field winding to produce flux; the flux from the field winding induces a voltage in the armature winding.

•Synchronous generators can operate either as generators or as motors •Synchronous motors run in synchronism with the revolving field: –When the frequency is fixed, the motor speed stays constant irrespective of