Asynchronous motor rotor time constant adjustment method, current correction method, device and system

The invention provides an asynchronous motor rotor time constant adjustment method, a current correction method, a device and a system, and relates to the technical field of motor control, and the method comprises the steps: obtaining the electrical angular speed, resistance and inductance of a rotor; acquiring three-phase current and three-phase voltage of the motor; a current model is adopted, and first torque is obtained through calculation according to the rotor d-axis flux linkage, the rotor q-axis flux linkage, the initial rotor time constant, the stator d-axis current and the stator q-axis current; a voltage model is adopted, and a second torque is obtained through calculation according to the stator alpha-axis flux linkage, the stator beta-axis flux linkage, the stator alpha-axis voltage, the stator beta-axis voltage, the stator alpha-axis current and the stator beta-axis current; enabling the deviation of the first torque relative to the second torque to be within a preset range so as to generate a r