METHOD FOR DETERMINING PARAMETERS OF ASYNCHRONOUS ELECTRIC MOTOR Russian patent published in 2015 - IPC G01R31/34 

FIELD: electricity.

SUBSTANCE: during start and operation of an asynchronous electric motor, instantaneous values of currents and voltages are measured simultaneously on two phases of the stator of the asynchronous electric motor at supply voltage of the asynchronous electric motor below the nominal value, at which the rotor of the electric motor remains fixed. Measured instantaneous values of currents and voltages are converted from a natural coordinate system to a rectangular stationary system of coordinates. Three time delays of converted currents and voltages of the asynchronous electric motor are performed subsequently. The obtained values are saved and used for determination of active resistance of stator winding, time constant of the rotor, which are equivalent to time constant and active resistance of the asynchronous electric motor.

EFFECT: possible determination of parameters of an asynchronous electric motor in real time.

2 cl, 1 dwg, 1 tbl