METHOD FOR DETERMINING THE LIQUID FLOW RATE OF A CENTRIFUGAL PUMP WITH AN ASYNCHRONOUS ELECTRIC DRIVE Russian patent published in 2022 - IPC G01F15/07 

FIELD: flow rate determination methods.

SUBSTANCE: invention relates to a method for determining the flow rate of a centrifugal pump with an asynchronous electric drive. The instantaneous values ​​of currents and voltages of the stator of the asynchronous motor are measured, the module of the stator voltage vector is determined, the module of the stator current vector is determined. Time delays of at least 3 ms are sequentially performed, three-time delayed values ​​of three-phase stator currents and voltages are obtained, three-time delayed modules of stator current and voltage vectors are obtained, these values ​​are fed to the input of an artificial neural network. With the help of an artificial neural network, previously trained according to the experimental data of the operation of a centrifugal pump with an asynchronous electric drive under various input influences, both from the frequency and amplitude of the supply voltage, and from the hydraulic resistance, using the dependencies between the input and output data identified by the artificial neural network during training, intermediate values are determined according to the liquid flow formula, thereby determining the instantaneous value of the liquid volumetric flow rate of the centrifugal pump with an asynchronous electric drive. The values of the centrifugal pump liquid volumetric flow rate delayed once and three times are determined and used as feedback.

EFFECT: increasing the accuracy of determining the volumetric flow rate of the liquid.

1 cl, 1 dwg