FEATURES OF THE INFLUENCE OF THE TECHNICAL PARAMETERS OF ASYNCHRONOUS MOTOR ON THE FORMATION OF IT'S THREE-PHASE STATOR CURRENT SYSTEM

In recent decades, there has been a growing trend towards the increasing role of automated electric drives implemented based on asynchronous motors. This trend is driven by several objective factors, among which the main ones are the development of mathematical models of asynchronous motors, leading to increased accuracy and functional capabilities of their control systems, and active advancement in power semiconductor technology, resulting in improved efficiency and reduced cost of power frequency converters. It is worth noting that a consequence of modern technical progress is the increase in complexity, cost, and technological sophistication of industrial equipment, thus leading to potential losses accompanied by its malfunction during operation. Another trend in the development of industry, both in Ukraine and in most industrially advanced countries, is the increase in the quantity of electrical equipment that has reached its nominal service life. Since there is an inverse proportional relationship between reliability and operating time of rotating electric machines, it is quite logical and evident that this leads to the growing relevance of building highly efficient systems for their diagnostics. The article justifies the expediency of applying current-based diagnostic methods for asynchronous motors, which do not require intervention in the construction of the electric machine, allowing simplification of the design of the diagnostic system and reducing capital costs for its construction. It also theoretically substantiates the functional relationship between the technological parameters of an asynchronous motor and the frequencies of the components of the current signal of its stator circuit, on which their influence will manifest, which in perspective will allow identifying abnormal deviations from the corresponding technological parameters by monitoring the harmonic components of the stator current.