Method for identifying permanent magnet flux and quadrature axis inductance of permanent magnet synchronous motor

The invention discloses a method for identifying permanent magnet flux and quadrature axis inductance of a permanent magnet synchronous motor. The method comprises the steps as follows: designing a filter based on an identification algorithm and calculating identification parameters. The accuracy of the permanent magnet flux and quadrature axis inductance parameters directly influences the control performance of a vector control system of the permanent magnet synchronous motor. But the existence of a saturation effect and the like enables the motor parameters to be non-linearly changed. Therefore, a change curve of the motor parameters is necessarily measured or identified on line. The invention discloses the simple and easy method for identifying the permanent magnet flux and the quadrature axis inductance, and the control performance of the system is improved on the basadopts not increasing the system cost.