Methods and algorithms to account the design of windings of asynchronous machine in frequency electric drives

Abstract

The reason for writing this article was that the researchers use always the one same mathematical model of
the induction machine in the frequency control systems, the model of idealized machine with a sinusoidal distribution of the magnetic flux density in the air gap.
Authors conducted the calculation distribution of magnetic induction in the gap of induction machine by
the tooth contours method and found deviations from the sinusoidal distribution. Simulation of induction motor start in MATLAB showed noticeable effect even a small non-sinusoidal distribution of the magnetic induction in the electrical and electromechanical processes electric drive
Authors suggested a modified method for transforming vector currents, magnetic fluxes, taking into account the actual structure of the windings of the asynchronous machine. On this basis has been developed a software package in Visual C# language for calculation of the correction functions and for simulation starting of asynchronous machine.
The method proposed does not require rework of frequency control systems.
Just add the correction function and the coefficients obtained by the authors in modified Clarke and Park transformations in frequency control system of induction machine.
Authors proposed method can be useful for the analysis of processes in the three-phase synchronous cylindrical rotor machines, dual power supply machines, as well as other tasks