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  3. Volume 7, Number 1, 2025
  4. Model Development and Structural-Parametric Synthesis of a Fractional- Order Speed Controller of theFC-AM System

Model Development and Structural-Parametric Synthesis of a Fractional- Order Speed Controller of theFC-AM System

SEPES.
2025;
Volume 7, Number 1
: pp. 28 - 38
https://doi.org/10.23939/sepes2025.01.028
Authors:
  1. Bohdan Kopchak
  2. Andrii Mandiuk
  3. Andrii Kushnir
  4. Vira Oksentyuk
  5. Yurii Bobechko
  6. Аndrij Kushka
1
Lviv Polytechnic National University Department of Electric Mechatronics and Computerized Electromechanical Systems
2
Lviv Polytechnic National University Department of Electric Mechatronics and Computerized Electromechanical Systems
3
Lviv State University of Life Safety Department of Supervision-Preventive Activity and Fire Automatics
4
Lviv Polytechnic National University Department of Computer-Aided Design
5
Lviv Polytechnic National University Department of Electric Mechatronics and Computerized Electromechanical Systems
6
Lviv Polytechnic National University Department of Electric Mechatronics and Computerized Electromechanical Systems

In modern industry, the most widely used are adjustable electric drives of the ‘Frequency converter - induction motor’ (FC-AM) system, in which integer-order controllers are mainly implemented and used. The use of fractional-order controllers in electromechanical FC-AM systems allows to ensure: higher quality of transition processes, increase the stability margin and reliability of the system, higher robustness to changes in motor parameters and, as a result, guarantees higher performance compared to classical integer controllers.
In the work, a linearized model of the FC-AM electric drive with scalar control and negative feedback on speed is developed, its parameters are calculated for a specific electric drive and its accuracy is confirmed by modeling.
The article develops a new approach to determine the structure and parameters of the speed controller of the FC-AM electric drive based on the application of the corresponding fractional order desired form. The calculation of fractional and integer speed controllers is carried out in accordance with the specified parameters of the rise time and overshoot of the motor speed.
The developed method of structural-parametric synthesis of fractional order controllers makes it possible to create new and upgrade existing industrial FC-AM electric drives based on fractional order controllers and use it in engineering calculations.

electric drive
frequency converter
asynchronous motor
synthesis
fractional order controller
fractional order desired form
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