An adaptive incremental predictive current control method of PMSM

An incremental predictive current control method of PMSM is presented, where two adjacent prediction models are subtracted to eliminate back EMF items. It is promising to realize the fastest dynamic response while just one parameter of motor, the q-axis inductance, is needed. Parameter stability analysis of the method is carried out in discrete domain. The result shows that the stable range is not wide enough, which leads that the predictive algorithm is difficult to be adopted in practical applications. To overcome this problem, an online identification method of q-axis inductance based on incremental mode of MRAS is proposed to eliminate the interference of parameter mismatch. Simulation results verify the feasibility of the methods proposed.