Causes of Discrepancies on Calculation of Rotor Quantities and Exact Equivalent Diagrams of the Synchronous Machine

The conventional diagram of the synchronous machine accurately represents only the stator circuit. It will be shown with the aid of examples that transients for rotor quantities (rotor voltage, rotor current, etc.) can also be predetermined with satisfactory accuracy if calculations are based on equivalent diagrams correctly representing field and damper as well as stator circuits.