The Control System for Domestic Electric Drives Built at REC Ural
Frequency converters regulate the speed of an electric drive in production. However, in open-loop control circuits, the control accuracy of a variable such as speed may be insufficient. Scientists from South Ural State University, together with specialists from STC Drive Technology, create special laws for controlling the frequency converter to solve the problem.The work on the project is carried out within the framework of the REC Ural.
Modern automated production is impossible without an electric drive. This high-tech system drives almost all mechanisms in industrial enterprises, such as rolling mills, traction mechanisms, drives for winches, and mud pumps. Semiconductor (transistor) frequency converters control the speed of an AC drive. In domestic production, accurate speed control is possible only by using sensors, and in sensorless systems, the problem of precise speed and torque control has not been solved so far. To improve the capabilities of existing domestic control systems for valve converters, scientists from South Ural State University propose to use control systems for complex transistor frequency converters with new control algorithms.
"The task of synthesizing control systems for transistor frequency converters, providing improved regulation and reliability indicators, is urgent and requires a top-priority solution. In the developed control system, special laws with frequency-pulse-width modulation of the carrier frequency will be applied. Adaptive models of electromagnetic processes will be used as observers of the estimated feedback variables," said Maxim Grigoriev, project manager, head of the Department of Electric Drive and Mechatronics at the SUSU Institute of Engineering and Technology.
The development of control systems for a complex transistor converter with further production can significantly increase the energy and reliability indicators of the product. It is one of the main projects included in the portfolio of the Ural Interregional Scientific and Educational Center "Advanced production technologies and materials". The project is developed by the team of the Department of Electric Drive and Mechatronics of SUSU, as well as the Scientific and Technical Center "Drive Technology", the leading campaign in the Chelyabinsk region, which occupies a leading position among production and engineering companies in the country. "Drive Technique" specializes in the implementation of automation and electric drive systems in metallurgy, mechanical engineering, oil and gas, and other industries.
"Our company has been cooperating with the department of SUSU for 20 years, and all managers are its graduates. Being engaged in the development of modern converting technology, we often face problems that can be solved only in close cooperation with scientific organizations. This project is no exception. It will allow us to catch up with the Western giants in terms of the manufacturability and functionality of our converters. With new circuit solutions developed by our specialists, we will be able to bring Russian converting equipment to a fundamentally new level", said representatives of the Scientific and Technical Center "Drive Technology".
The researchers proposed algorithms for controlling the electromagnetic torque and automatic tuning of the circuits system. The project will improve the quality indicators of frequency converters in terms of accuracy characteristics. In addition, a significant improvement in system reliability is expected by reducing failures when operating in short-circuit (torque brake) modes. The development will make them able to compete with modern western solutions in their markets and establish high-tech exports. Rosneft, Mechel Group, Ural-Siberian Industrial Company JSC, and other big companies show interest in the results. According to plans, the project is to complete in 2023. South Ural State University is a university of digital transformations, where innovative research is carried out in most of the priority areas of development of science and technology. Following the strategy of scientific and technological development of the Russian Federation, the university focuses on the development of large scientific interdisciplinary projects in the field of the digital industry, materials science, and ecology. In the Year of Science and Technology, SUSU won the competition for the Priority 2030 program. The university performs the functions of a regional project office of the Ural interregional scientific and educational center.
Provided by South Ural State University
