When the generator is connected to the mains momentarily, the voltage to its terminals will be indicated by the frequency of rotation and by the number of poles, resulting in the frequency of the three-phase voltage of the machine.
In order for the synchronous machine to transform the mechanical energy applied to its shaft or shaft, it is necessary for the field winding located in the machine rotor to be supplied by a source of continuous voltage, so that, when performing the rotation, the magnetic field caused by the rotor poles to have a relative movement to the conductors of the stator windings.
It is worth remembering that in performing functions as a generator, mechanical energy is produced and supplied due to the machine by the application of a torque and by the rotation of the shaft or shaft thereof. In this way, the mechanical energy source can be a hydraulic turbine, gas or steam. helical gear boston
Because of the relative movement between the magnetic field of the rotor poles, the intensity of the magnetic field circulating through the stator windings may change over time, and according to the ohm law, voltage induction will occur to the winding terminals of the rotor. stator.