Online q-axis Inductance Identification of IPM Synchronous Motor Based on Relationship between Its Parameter Mismatch and Current

抄録

This paper proposes a new approach to achieve online identification of the q-axis inductance of the interior permanent magnet synchronous motor (IPMSM) based on the relationship between the mismatch of L_q and the d-axis feedback current. The value of the d-axis feedback current depends on the mismatch of L_q, and the consecutive samplings of the d-axis feedback current make it possible to calculate the true value of L_q. The proposed identification technique has been examined through some experimental tests. The test results demonstrate the fast convergence of the identified L_q to the true one with a small error.