The equivalent circuit model of a round-rotor synchronous machine represents each stator phase winding as a generated (excitation) voltage source in series with winding resistance and a synchronous reactance (self- plus mutual-inductance term), derived from the machine's electromagnetic flux-linkage relationships between the field winding and the three-phase stator windings. The model formalizes how the frequency of generated voltage depends on rotor speed and pole number, how the field winding's rotation induces sinusoidal, balanced three-phase voltages 120 degrees apart, and how, under steady-state balanced operation, the stator currents produce an equivalent constant-flux effect in the rotating rotor reference frame. This belongs to electrical power engineering's treatment of synchronous machine theory, foundational to power system analysis of generator behavior under load.
The equivalent circuit model of a round-rotor synchronous machine represents each stator phase winding as a generated (excitation) voltage source in series with winding resistance and a synchronous r…