Improvement of functional diagnostics of asynchronous motors

Abstract

In recent years, in various sectors of the national economy, including railway transport, along with other electrical, electromechanical, and electric power plants, asynchronous motors are also widely used. For example, on 49 AC electric locomotives operated on the electrified railways of the “Uzbekiston Temir Yullari” joint-stock company, 294 asynchronous traction motors operate. Foreign and local experience shows that 20-25% of these engines fail annually due to imperfect diagnostic systems. In the world, to continuously monitor and assess the technical condition of electrical equipment and installations at electrical and electric power production facilities, research is being carried out aimed at increasing the reliability, expanding the functionality, and reducing the cost of functional diagnostics systems and their technical means based on electrical, thermal, vibroacoustic, magnetic and optical phenomena. In particular, much attention is paid to the development of full-fledged mathematical diagnostic models of asynchronous traction motors of electric locomotives, the choice of their diagnostic parameters that allow obtaining reliable information for diagnostics, having the ability to measure and invariant to various external noises, as well as the complex use of functional diagnostics methods. At the same time, improvement of methods and technical means of functional diagnostics of traction induction motors of electric locomotives is required.