| Types.VoltageModulePu | EfdHighPu | | Higher abscissa of saturation characteristic in pu (user-selected base voltage) |
| Types.VoltageModulePu | EfdLowPu | | Lower abscissa of saturation characteristic in pu (user-selected base voltage) |
| Types.VoltageModulePu | EfdRawMaxPu | | Maximum non-saturated excitation voltage in pu (user-selected base voltage) |
| Types.VoltageModulePu | EfdRawMinPu | | Minimum non-saturated excitation voltage in pu (user-selected base voltage) |
| Types.VoltageModulePu | EfdSatHighPu | | Higher ordinate of saturation characteristic in pu (user-selected base voltage) |
| Types.VoltageModulePu | EfdSatLowPu | | Lower ordinate of saturation characteristic in pu (user-selected base voltage) |
| Types.PerUnit | Ka | | Voltage regulator gain |
| Types.PerUnit | Ke | | Exciter gain |
| Types.PerUnit | Kf | | Exciter rate feedback gain |
| Types.Time | tA | | Voltage regulator time constant in s |
| Types.Time | tE | | Exciter time constant in s |
| Types.Time | tF | | Exciter rate feedback time constant in s |
| Types.Time | tR | | Stator voltage time constant in s |
| Types.PerUnit | Bsq | if EfdHighPu > EfdThresholdPu then EfdHighPu*EfdSatHighPu/(EfdHighPu - EfdThresholdPu)^2 else 0 | Proportional coefficient of saturation characteristic |
| Types.VoltageModulePu | EfdThresholdPu | (EfdLowPu - EfdHighPu*Sq)/(1 - Sq) | Excitation voltage below which saturation function output is zero, in pu (user-selected base voltage) |
| Types.PerUnit | Sq | if (EfdHighPu > 0 and EfdSatHighPu > 0) then sqrt(EfdLowPu*EfdSatLowPu/(EfdHighPu*EfdSatHighPu)) else 0 | Ratio of staturation characteristic |
| Types.VoltageModulePu | Efd0Pu | | Initial excitation voltage in pu (user-selected base voltage) |
| Types.VoltageModulePu | Us0Pu | | Initial stator voltage in pu (base UNom) |
| Types.VoltageModulePu | EfdRaw0Pu | Ke*Efd0Pu + (if Efd0Pu > EfdThresholdPu then Bsq*(Efd0Pu - EfdThresholdPu)^2 else 0) | Initial non-saturated excitation voltage in pu (user-selected base voltage) |
| Types.VoltageModulePu | UsRef0Pu | if Ka > 0 then Us0Pu + EfdRaw0Pu/Ka else 0 | Initial reference stator voltage in pu (base UNom) |
