Flux identification for vector control of the synchronous motor drives

The paper deals with the identification of the orientation flux for a vector controlled salient-pole synchronous motor drive. There are presented two methods. According to the first method the stator flux is obtained by integration of the stator-voltage equations. A low-pass-filter-based closed-loop integration algorithm is discussed. The second method is based on the current model of the machine, with and without considering the damping currents. Both procedures were simulated and used in implemented stator-flux computation. Experimental results are presented, too.