METHOD FOR IDENTIFYING THE TIME CONSTANT OF THE ROTOR AND THE MUTUAL INDUCTANCE OF THE STATOR AND ROTOR OF AN ASYNCHRONOUS MOTOR IN A VECTOR FIELD-ORIENTED CONTROL SYSTEM Russian patent published in 2022 - IPC H02P21/16 H02P21/24 

FIELD: electric motors controlling methods.

SUBSTANCE: invention relates to a method for controlling electric motors using vector control. The method for identifying the time constant T_r of the rotor of an induction motor in the system of vector field-oriented control consists in setting the initial values ​​of the time constant T_r of the rotor and current I_d, then at least two times different values ​​of the current I_q are set, at which the torque on the shaft of the asynchronous motor is measured, fix at a given moment of time, the values ​​of the angular frequency of rotation of the rotor, the magnetic flux and the load on the rotor, and taking into account these parameters, the change in the torque-generating current component I_q is fixed, which will correspond to the new value of I_q1, as well as the value of the electromagnetic torque M1. Further, when the load on the shaft of the asynchronous motor changes, a new value of I_q2 is also recorded, as well as a new value of the electromagnetic torque M₂. Next, the ratios of currents KI and the ratios of moments K_M are calculated according to the equations, where K_I=I_q2/I_q1 and K_M=M₂/M₁, the condition is checked under which K_I=K_M. The asynchronous motor is controlled at the value of the time constant Tr of the rotor, at which the condition K_I=K_M is fulfilled.

EFFECT: improving the field orientation accuracy of the vector control system for an asynchronous motor.

1 cl, 2 tbl, 3 dwg