 The generator's formula_1 and formula_2 parameters can be determined by measuring the winding resistance (corrected to operating temperature), and measuring the open-circuit and loaded voltage for a defined current load.This is the simplest model of a generator, further elements may need to be added for an accurate representation.In particular, inductance can be added to allow for the machine's windings and magnetic leakage flux, but a full representation can become much more complex than this.