METHOD FOR DETERMINING THE PRESSURE OF A CENTRIFUGAL PUMP WITH AN ASYNCHRONOUS ELECTRIC DRIVE Russian patent published in 2023 - IPC F04B51/00 F04D13/06 

FIELD: pressure control instrumentation.

SUBSTANCE: invention relates to instrumentation and can be used to control the pressure of water and other fluids. The pressure on the supply pipeline, the instantaneous values of the currents and voltages of the stator of the asynchronous motor are measured, the three-phase values of currents and voltages are converted into two-phase components of currents and voltages, the modulus of the stator current vector, the modulus of the stator voltage vector are determined. Time delays are sequentially performed for at least 2 ms, receiving twice delayed input pressure values, twice delayed two-phase values of stator currents and voltages, twice delayed modules of stator current and voltage vectors, are fed together with the same undelayed input variables to the input of an artificial neural network, with using an artificial neural network, previously trained on the basis of experimental data on 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 of the network and input pressure, using the dependencies between the inputs identified by the artificial neural network during training and output data, intermediate values and the instantaneous value of the liquid pressure of a centrifugal pump with an asynchronous electric drive are determined, the values of the outlet pressure of the centrifugal pump delayed twice and four times are determined and used as feedback.

EFFECT: increase in the accuracy of pressure determination.

1 cl, 1 dwg