METHOD OF DETERMINING ANGULAR VELOCITY OF ROTATION OF ROTOR OF ASYNCHRONOUS ELECTRIC MOTOR Russian patent published in 2025 - IPC G01R31/34 H02P21/14 G01L3/22 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used for accounting of rotor rotation angular speed of asynchronous electric motor. During the method implementation the instantaneous values of currents and voltages of the asynchronous motor stator are measured, three-phase values of currents and voltages are converted into two-phase components of currents and voltages. At each of the time intervals, the stator current components estimates are determined, the rotor flux linkage components estimates are calculated. Estimated values of stator current and rotor flux linkage are used to determine residual function and its increment. Residual function and its increment are used to determine the association of the residual function and the increment of the residual function with five linguistic variables using a fuzzy logic apparatus. Boolean variables are interpreted according to the set of rules using Mamdani fuzzy implication technique. At the defuzzification step, gain coefficients of the proportional, integral and differential components are determined based on a centre of gravity method. Obtained residual function coefficients and residual function increments are used to define induction motor rotor rpm. Obtained value of the angular velocity is used to determine estimates of the stator current, rotor flux linkage and discrepancy function at the next step.

EFFECT: improving accuracy of determination of rotor rotation angular speed for asynchronous electric motor.

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