Library of Digital Communication Algorithms in the SimInTech Dynamic Modeling Environment. Opportunities and Prospects for Development

This article is devoted to the description of the simulation process of automatic control systems using the SimInTech dynamic modeling environment. Here is given a brief his-tory of the development of the software package from simulation to end-to-end process of creating the automatic control systems. Also describes the purpose of mathematical modeling of automatic control systems. The article presents basic information on modeling and development process in the environment. The example detailed step by step creation of an automation scheme is considered. The advantages and disadvantages of the SimInTech environment are shown in comparison with the competitive environment of Simulink.

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Mathematical model of an asynchronous machine in real coordinates of state

ВІСНИК СХІДНОУКРАЇНСЬКОГО НАЦІОНАЛЬНОГО УНІВЕРСИТЕТУ імені Володимира Даля ◽

10.33216/1998-7927-2021-269-5-24-28 ◽

2021 ◽

pp. 24-28

Author(s):

Є.С. Руднєв ◽

І.С. Шевченко ◽

Ю.А. Романченко

Keyword(s):

Dynamic Modeling ◽

Asynchronous Motor ◽

Asynchronous Machine ◽

Electric Drives ◽

Modeling Environment ◽

Phase Coordinates ◽

Start Up ◽

Energy Processes ◽

Vector Matrix ◽

The Given

A mathematical description of an asynchronous machine with unreduced parameters in the space of real phase coordinates is given. When studying an asynchronous motor in a dual power supply system with controlled converters in rotor and stator circuits, there is a need for an AM model without parameters, in which the processes in the stator and rotor circuits will correspond to reality in magnitude. In addition, such a model is necessary when analyzing the energy parameters of the whole electric drive controlled by the rotor. To observe real processes in the stator and rotor, the model should be designed in separate spatial coordinate systems. In reference books for AM with a wound rotor (WR), as a rule, the real parameters (resistances, currents and voltages) of the stator and rotor and the voltage reduction coefficient ( ke ) are given. Bringing currents and resistances (inductances) is carried out by coefficients ki=ke and kr=ke2 respectively. Let's consider the description of the machine without reduction of parameters. For the convenience of further consideration, let's introduce the general value of the mutual inductance. We obtain an equation for the electromagnetic moment in real coordinates. Let's design a model in the MATLAB dynamic modeling environment using vector-matrix representation. Matrix algebraic operations with vector variables are implemented by Matlab Fn blocks, which are the calls to userdefined functions described in the form of M-files. The content of Matlab Fn functions is considered. On the model, the processes of starting of an AM with a phase rotor of AK-52-6 type were. Shows the graphs of start-up transients. The processes in the obtained model coincided with the results of modeling of this engine in the model with the coordinates reduced to the rotor. Thus, the energy processes described by this model correspond to the processes to the model with the given parameters, and the processes of currents and flux linkages changing of the stator and rotor are real. The model designed in the MATLAB/Simulink dynamic modeling environment can be used to study double-powered asynchronous electric drives.

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Mathematical modeling of magnetic influence of direct current catenary with voltages of 3 and 24 kV on adjacent communication facilities

Transport of the Urals ◽

10.20291/1815-9400-2021-2-97-100 ◽

2021 ◽

pp. 97-100

Author(s):

E. S. Mushkov ◽

◽

A. N. Marikin ◽

M. A. Ivanov ◽

A. V. Agunov ◽

...

Keyword(s):

Mathematical Modeling ◽

Dynamic Modeling ◽

Direct Current ◽

Matlab Simulink ◽

Modeling Environment

The paper analyses a magnetic influence of a direct current catenary with voltages of 3 and 24 kV on adjacent communication facilities. The authors have compared the gained results with standards of magnetic interference. The have developed a model of catenary with voltages of 3 and 24 kV in the Matlab Simulink dynamic modeling environment. With the use of the model the authors have determined parameters of all key components that it is necessary to consider at analysis of magnetic compatibility of the direct current catenary with adjacent communication facilities.

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