The Full Rank Identification of DTP-PMSM Parameters

In order to solve the rank-deficient problem in the on-line parameter identification of Double-Three-Phase Permanent Magnet Synchronous Motor (DTP-PMSM), this paper proposes to adopt the two-time-scale approach (i.e., two identification algorithms with different sampling speeds update each other) to overcome the rank-deficient problem, so as to guarantee the accuracy and uniqueness of the identification results. The hybrid algorithm of double model reference adaptive system (MRAS) are analyzed theoretically. According to the above theoretical analysis, DTP-PMSM drive system is set up and system simulation verification is implemented. The results show that two-time-scale approach have high accuracy under direct torque control.