The Superiority of Finite Control Set Methods in Parameter Identification Without High Frequency Signal Injection for PMSM

While numerous parameter identification methods have been proposed for the permanent magnet synchronous motor (PMSM) that do not require external signal injection, none of them allocates sufficient attention to the input signal. Drawing upon the mathematical model of the PMSM, this study analyzes the characteristics of the drive system and derives the Fisher information function. Subsequently, an optimization problem is formulated to compute the optimal input signal, adhering to the principles of D-optimality. Theoretical analysis demonstrates that employing the finite control set method in the current loop yields superior estimation quality compared to the continuous set method. This conclusion is substantiated by comparative tests.