Development of a virtual hardware temperature observer for frequency-controlled asynchronous electric motors

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.280357

Keywords:

asynchronous electric motor, renewable energy, temperature observer, resistance, thermal protection

Abstract

One of the most common types of AC electric machines are asynchronous electric motors. Because of their simple and reliable design, they are used in many industries. In this paper, the object of research is an asynchronous electric motor with a short-circuited rotor. To ensure the normal operation of an asynchronous electric motor, the heating temperature of its active parts should not exceed the maximum permissible values, which are determined by the corresponding class of heat resistance of the insulation system used in the electric motor. In asynchronous electric motors, the stator winding is the most thermally vulnerable node, which is the first to fail when the temperature of the electric motor increases. Thermal protection devices protect an asynchronous electric motor from emergency operating modes accompanied by an unacceptable excess of the temperature of their windings.

In order to build an indirect system of protection against overheating of the stator windings, a temperature observer has been developed using already available signals in a frequency-controlled electric drive. Simulation studies were performed in Matlab/Simulink application software packages. Simulation studies were carried out on the basis of asynchronous electric motors of the 4A series with a capacity of 30, 75 and 110 kW in the temperature range from 20 °C to 250 °C. As a result of the research, it was found that the error of indirect calculation of the temperature of electric motors, taking into account the correction factor, does not exceed 1 %. The proposed temperature observer can be used to build protections for asynchronous electric drives

Supporting Agency

  • We would like to express our great gratitude to the Doctor of Technical Sciences, Professor Boris Nikolaevich Yashin and Doctor of Technical Sciences Irina Yuryevna Semykina for making a great contribution to the research and development of thermal protection systems of an asynchronous electric motor

Author Biographies

Gulim Nurmaganbetova, Saken Seifullin Kazakh Agrotechnical Research University

PhD, Senior Lecturer

Department of Energy

Sultanbek Issenov, Saken Seifullin Kazakh Agrotechnical Research University

PhD, Associate Professor, Dean of the Faculty of Energy

Department of Energy

Vladimir Kaverin, Abylkas Saginov Karaganda Technical University

PhD, Acting Professor

Department of Energy, Automation and Telecommunications

Zhanat Issenov, Toraighyrov University

Master of Technical Sciences, 2 Year Doctoral Student in the Specialty Electrical Power Engineering

Department of Electrical Power

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Development of a virtual hardware temperature observer for frequency-controlled asynchronous electric motors

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Published

2023-06-30

How to Cite

Nurmaganbetova, G., Issenov, S., Kaverin, V., & Issenov, Z. (2023). Development of a virtual hardware temperature observer for frequency-controlled asynchronous electric motors. Eastern-European Journal of Enterprise Technologies, 3(1 (123), 68–75. https://doi.org/10.15587/1729-4061.2023.280357

Issue

Vol. 3 No. 1 (123) (2023): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2023 Gulim Nurmaganbetova, Sultanbek Issenov, Vladimir Kaverin, Zhanat Issenov

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