Analysis of self-dual excited synchronous machine. I. Development of the general mathematical model and steady-state performance experimental verification

Synchronizing and Damping Torques of Saturated Dual-Excited Alternators

“…Nevertheless, most of the previous works [5,16,19] have neglected the electromagnetic nonlinearity effects, while others [2,14,15] consider the saturation basedon the open circuitcharacteristic. All these authors assume that only the mutual reactances are influenced by saturation, while the leakage reactances are assumed unsaturable.…”

“…Many attempts havebeen done to improve both the method of calculation of these coefficients [6][7][8][9][10] and the model representing the machine (11)(12)(13). Previous authors [14][15][16] have adopted the conventional equivalent circuit to model the dual excited alternator. This model assumes equal mutual reactances between the armature, field and damper windings in each axis.…”