Influence of tooth harmonics on the dynamic characteristics of the electric drive of pumping units

The article compares the centrifugal pumping units electric drive dynamic characteristics at different rotational speeds of the main magnetic field. The tooth harmonics order is determined by the number of stator slots, which depends on the main magnetic field rotation frequency. Proposed mathematical model takes into account the tooth harmonics of the electric motor and the hydraulic parameters of the pump load. Research methods are: the theory of centrifugal blade machines, electric machines, operational calculus methods, equivalent replacement schemes. MatLab/Simulink software is used for simulation. The results of numerical experiment and calculations showed the influence of the tooth harmonics on the shape of the curves of the electromagnetic moment.