Stability of anonlinear system «frequency converter-asynchronous motor»
Tergemes K.T. Karassayeva A.R. Sagyndikova A.Zh. Orzhanova Zh.K. Shuvalov Е.
2021National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2021#3Issue 447124 - 128 pp.
In modern industry, various industries are widely used frequency converters (FС) to control the speed of rotation of asynchronous motors. Widely used frequency converters that feed asynchronous motors allow you to optimize production, reduce electrical energy consumption, increase the service life of equipment, etc. The article considers the system frequency converter-asynchronous motor as a complex nonlinear automatic control system. On the basis of the linearized transfer function of the frequency converter and the asynchronous motor, the block diagram of the open system frequency converter - asynchronous motoris made. The mathematical description of the system is written by algebraic controls in symbolic form. A program for generating the transfer function and calculating the roots of the characteristic equation using the MATLAB application package is presented. To determine the stability of the frequency converter - asynchronous motor system, a program is compiled where the stability of the system is determined by the characteristic roots of the equation. The transient curve of the speed and torque of an asynchronous motor confirms the adequacy of the block diagram frequency converter-asynchronous motor and its mathematical description.
Asynchronous motor , Autonomous voltage inverter , Electric drive , Frequency converter , Nonlinear system
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Аlmaty University of Energy and Communication, Almaty, Kazakhstan
Tallinn University of Technology, Tallinn, Estonia
Аlmaty University of Energy and Communication
Tallinn University of Technology
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