Permanent magnet synchronous motor stator electromagnetic parameter identification method

The invention discloses a permanent magnet synchronous motor stator electromagnetic parameter identification method, which comprises the following steps of: 1, fixing an electrical angle to enable a mechanical angle to be 0; 2, adjusting the output voltage by adjusting the width of the output PWM pulse, when the output current is greater than 0.75 times of the rated current, obtaining the current output voltage, continuing to adjust the width of the output PWM pulse, when the output current is greater than 1.5 times of the rated current, obtaining the current output voltage, and calculating the resistance value according to the two voltages; 3, adjusting the width of the output PWM pulse to enable the output current to be 0, then adjusting the voltage to be the U2 value again, recording time, continuing to adjust the voltage, and recording time when the output current is larger than multiple rated current; and calculating the inductance value according to the resistance value and the two times of time. The me