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INVESTIGATION OF MECHANICAL TRANSIENT PROCESSES IN FREQUENCY-CONTROLLED ASYNCHRONOUS ELECTRIC DRIVES UNDER ASYMMETRIC CONDITIONS

Field of Science:Energy Engineering and Power Technology
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ARTICLE ANNOTATION

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Abstract. The article examines mechanical transient processes in asymmetric modes of a frequency-controlled asynchronous electric drive. Methods and materials. Given the law of frequency variation over time and the nature of the load on the asynchronous motor shaft, solving this system of equations is extremely difficult, and in some cases impossible, as they contain a large number of variables and unknown parameters. However, this problem is easily solved using a graphical analysis method. Results. The laws of acceleration and deceleration of the rotating magnetic field of an asynchronous motor, as well as the change in s_sirp depending on time and frequency at different levels of voltage asymmetry, are determined, which is an important factor in the implementation of these modes in practice and allows us to formulate requirements for automatic control systems. Conclusion. Variable-frequency asynchronous electric drives operate efficiently even in asymmetrical modes, but their mechanical transitions are sensitive to sudden changes. Therefore, it is necessary to ensure power supply symmetry, use protection functions (FP), and pre-calculate transitions using mathematical modeling.

AUTHORS

Science ID: DSN-0525-0036

Science ID: MQD-0626-0003

Science ID: MQD-0626-0004

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# kuchlanish# faza# tezlik# vaqt# moment# elektromagnit# nasos# o‘zgartirgich# tok# rejim# asinxron# elektr# yuritma# asimmetrik# chastota# pusk# quduqli# agregati# funksiyasi

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