A MRAS Based Identification Method of Stator Resistance Considering Iron Loss for Main Machine in Wound-Rotor Synchronous Starter-Generator

The brushless wound-field synchronous machine is an important candidate for the integrated stator-generator of more-electric aircraft. The stator resistance of the main machine is an important parameter for the optimization control of the brushless wound-rotor synchronous starter-generator. Due to the large armature currents of the main machine, the stator resistance will change with the heating of armature windings. This paper proposes an online estimation method based on model reference adaptive system considering iron loss for the stator resistance of main machine. The adjustable model is derived and the adaptive law is designed based on the Popov’s hyperstability theory. Experiment results of the starting process show that this online estimation method can effectively identify the stator resistance.