Abstract
Due to the widespread use of induction motors with a squirrel-cage rotor, the issue of increasing the reliability of machines of this type remains acute. According to statistics, the stator winding is the weakest node in terms of reliability. This article discusses various approaches to the diagnosis of the stator winding, which is seen as one of the main ways to improve the reliability of the machine. Such methods, as surge tests, monitoring of equivalent values of insulation parameters, diagnostics of partial discharges, and analysis of the response to a high-frequency discharge are analyzed. The advantages and disadvantages of each approach are discussed to identify the most promising methods.
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