Based on the current regulations on pipeline transport, the need for a systematic approach to the study of processes occurring in the technological complexes of pumping stations of the main pipelines and their power supply systems is shown.
The subject of the article is relevant, since the proposed method for performing a regression analysis of the operation of asynchronous motors does not have special requirements to the accuracy of measuring the quantities used in the regression analysis and to the volume of a training sample, so it can be used in modern embedded diagnostic systems.
The problem of calculation of transients in asynchronous motors which works from single-phase network with capacitors in a single phase is examined. The basis of the algorithm is a mathematical model of induction motors with the high level of adequacy. This model takes into account the phenomena of skin effect in the bars of the rotor and magnetic core saturation.
Mathematical model of unit, which includes asynchronous motor, clutch and pump is proposed. The model includes non-linear differential equations of electromagnetic effects in motor and motion equations of mechanical units, which generates uniform system. Calculation of transition process is developed by numerical integration of this system.
The technology of the numerical research into asynchronous motors with a squirrel-cage rotor with arbitrary-shaped slots using a universal parametric generator of the finite-element magnetic field models has been developed. The mathematical built-in software packages with an integrated, developed by the authors, dynamic-link library EMLib are used. The parametric generator allows a series of models for asynchronous motors used in programmable numerical experiments to be created.
Macromodel of three-phase asynchronous motor transients for current power stator, rotor speed and load on the shaft is described. Experimental transients is reproduced of first order maсromodel and relative mean square error less than one percent
The article discusses the problem of calculation transient processes in the asynchronous motors with capacitors switched in parallel that work in case of leakage of input voltage. The basis of the algorithm is a mathematical model of asynchronous motor that includes phenomenon of current extrusion in the bars of the rotor and magnetic saturation.
The article discusses the problem of calculation transient processes in the asynchronous motors with capacitors switched in parallel that work in case of leakage of input voltage. The basis of the algorithm is a mathematical model of asynchronous motor that includes phenomenon of current extrusion in the bars of the rotor and magnetic saturation
The paper considers boundaries of application of static equilibrium equations for exploring the oil pumping unit operation. The effect of crank counterbalance oscillation frequency on the character of the pumping unit full operation cycle and the dynamical component of the torque was studied. The algorithm relies on the mathematical model of the asynchronous motor and pumping unit.
A mathematical model for asynchronous motor taking into account rotor teeth skew has been developed. The model is based on magnetic field computation allowing for core saturation and magnetomotive forces spatial harmonics, differential equations algebrization with the g-th order backward differentiation formula and nonlinear algebraic equations system solving with Newton’s method.