DEVICE FOR DETERMINING ROTOR ROTATION FREQUENCY AND ESTIMATING MOMENT OF RESISTANCE ON ASYNCHRONOUS MOTOR SHAFT Russian patent published in 2024 - IPC H02P23/07 H02P23/14 

FIELD: electrical engineering.

SUBSTANCE: device relates to electrical engineering and can be used for digital control of an asynchronous motor. Device for determination of rotor speed estimation and estimation of moment of resistance on asynchronous motor shaft contains phase voltage sensors (1, 2, 3) and phase current sensors (4, 5, 6), which are connected to the asynchronous motor power supply phases, coordinate converter (7), time delay units (8, 9, 10, 11, 17, 21, 24, 26, 29, 30, 32, 34), units for determining the value of the prediction of current estimate (12, 13), unit for determining the value of the estimate of the moment of resistance on motor shaft (14), unit for determining the value of the estimate of the moment of resistance on motor shaft (15), units for determining correction value of current estimation (16, 20), units for determining value of prediction of rotor flux linkage (18, 22), unit for determining the value of the estimate of electromagnetic moment (19), units for determining the value of the correction of the estimate of rotor flux linkage (23, 25), unit for determining the value of the correction of the estimate of the moment of resistance on motor shaft (27), unit for determining the value of the prediction of the rotor rotation frequency (28), information output unit (31), unit for determining the value of the correction of the rotor rotation frequency (33).

EFFECT: wider range of equipment.

1 cl, 1 dwg