Abstract
The article presents a three-phase mathematical model of asynchronous machine with wound rotor based on differential equations. The equations are resolved with respect to the derivatives of flux linkages. The description of the computer program in the Matlab Simulink that implements the model and allows to simulate transients of the asynchronous motor is present. A simulation model of a three-phase asynchronous machine with wound rotor, which allows to investigate static and dynamic operating ranges when power converters are connected to the rotor circuit has been obtained. The results of approbation of the obtained simulation model in the Matlab Simulink environment and experimental research of asynchronous engine with wound rotor, driving into the asynchronous-valve cascade, are presented. The results of experimental studies of the asynchronous machine under sinusoidal voltage using a stand based on the asynchronous-valve cascade, and comparison of the oscillograms obtained with simulation results of the proposed model are presented. The comparison of experimental and calculated oscillograms of the current of the investigated asynchronous motor can be concluded on satisfactory accuracy of the proposed model and the possibility of its application for modeling and analysis of asynchronous electric drives.
Highlights
Mathematical models built on the basis of a generalized two-phase electric machine are used for analysis and synthesis of electric drive systems based on asynchronous machines with controlled converters [1,2,3]
Traditional modeling of electric drives is carried out in software packages Matlab Simulink, VisSim, etc., they are compiled either on the basis of a two-phase mathematical model of an asynchronous machine, or a three-phase mathematical engine model in a natural coordinate system directed along the axes of the phase stator windings, which is valid only for the connection diagram of the windings stator and rotor "star with neutral" [2,3,4,5,6]
– the model cannot work when the rotor is open; – the two-phase model, on the basis of which the basic asynchronous machine was developed in Matlab Simulink, does not exactly reflect the shape, amplitude and frequency of oscillatory components in dynamic modes; – the calculation is not performed adequately when power converters are included in the rotor circuit
Summary
Mathematical models built on the basis of a generalized two-phase electric machine are used for analysis and synthesis of electric drive systems based on asynchronous machines with controlled converters [1,2,3]. Traditional modeling of electric drives is carried out in software packages Matlab Simulink, VisSim, etc., they are compiled either on the basis of a two-phase mathematical model of an asynchronous machine, or a three-phase mathematical engine model in a natural coordinate system directed along the axes of the phase stator windings, which is valid only for the connection diagram of the windings stator and rotor "star with neutral" [2,3,4,5,6]. To analyze asynchronous electric drives in the Matlab Simulink software package, a basic simulation model of an induction machine with wound rotor is used. The purpose of the work is to create a simulation model that allows to study a three-phase asynchronous machine with phase-wound rotor when power converters are connected to the rotor circuit
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