Full-speed section calibration method and system for duplex-winding permanent magnet synchronous motor

The invention discloses a double-winding permanent magnet synchronous motor full-speed section calibration method and system, the calibration method comprises a motor basic parameter identification process, an MTPA calibration method and a weak magnetic calibration method of two sets of windings, and the MTPA calibration method of the two sets of windings comprises the following specific steps: S1, under different preset motor stator current amplitudes Is, the current amplitude Is of the two sets of windings is calculated; a motor stator current angle theta is adjusted, and a corresponding torque value is detected; when the torque value reaches the maximum torque value, a motor stator current amplitude Is and a motor stator current angle theta under the maximum torque value are obtained; and S2, obtaining a motor stator d-axis current Id matrix and a motor stator q-axis current Iq matrix according to the motor stator current amplitude Is and the motor stator current angle theta corresponding to the maximum to