Structural and functional modeling of thermal regimes of asynchronous motors in an air bag during flooding

An analysis is given of the technologies of underwater electromechanics, which make it possible to increase the reliability and efficiency of electric motors of pumping stations intended for draining flooded objects. The study is based on the study of thermal phenomena, since the insulation of the windings of electrical machines is sensitive to temperatures and is the most vulnerable element. Based on the methodology of the systems approach and functional modeling, a structural-functional model of imitation of an asynchronous electric drive operating under water is presented. It allows you to provide the ability to select the most rational temperature modes of operation, to prevent overheating of electrical insulation and to predict the service life of an electric motor. The structure and process of functioning of the electric drive model and the thermal model of the induction motor are described. They are based on the subsystems of load models, the electric motor itself, energy indicators, the electrothermal model, ventilation and cooling systems, and the resource of electrical insulation. It is concluded that the developed model makes it possible to determine the temperature and predict the residual life of the insulation system, taking into account the nature of the load, control parameters, cooling methods and immersion depth. The simulation results make it possible to make the right management decisions related to the operating modes of electric machines operating under water in a dynamic air cushion.