Ryzhkov A. Substantiation of parameters of functional diagnosing of thermal processes of asynchronous electric motors

Object - thermal processes in the asynchronous electric motor under influ-ence of operational conditions. Goal - increase of operational parameters of asyn-chronous electric motors with a short-circuited rotor by the continuous control and diagnosing of their operating modes and protection on the basis of mathematical model of thermal processes of asynchronous electric motors. Methods - a method of equivalent thermal schemes, a classical method of the decision of the differential equations, processing of results of researches with use of the software package of scientific calculations "SciLab". Novelty - has received the further development the theory of the interconnected thermal condition of the asynchronous electric motor as heterogeneous body which enables to define a thermal condition of a winding in function of a thermal condition of steel and loading of the electric motor; for the first time on the basis of experience of idling the received dependences for definition of parameters of the thermalscheme of the asynchronous electric motor; parameters of functional diagnosing of thermal processes asynchronous are proved. Results - the device of functional diagnosing and protection of asynchronous electric motors system which is entered at the State enterprise a pilot farm " Melitopolskoje". Branch of industry - the enterprises of agriculture and other branches of a national economy.