Yehorov A. Evaluation of the Thermal State the Electric Motor with a Rolling Rotor with Internal Mechanical Factors

The object of study is thermal processes in the engine with rolling rotor. The goal of research is analysis and simulation of thermal processes in the motor with rolling rotor given the influence of the lateral magnetic attraction force of an unilateral friction force in the touch node of the stator and rotor cores. Methods of research are based on three-dimensional simulation of the temperature field of rolling rotor engine, based on the finite element method. Classical methods, based on the method of equivalent thermal circuits with modeling in Matlab environment, were also used. To study the contact process of stator cores and rotor, the basic concepts of the theory of elastic deformations were used. Theoretical and practical results: calculating method for the power losses of rolling friction was established. It allows to get the correct calculations on cores heating of stator and rotor in the touch node. Method for calculating the temperature of the motor with a rolling rotor was developed, which allows at the design stage to consider additional heat output in the touch node of the stator and rotor cores for various designs of motors and operating modes. Design of the transmission of torque mechanism was improved. A sample of the motor with a rolling rotor that meets the basic technical requirements for electrical mechanisms of single-turn GOST 7192 was designed, produced and tested. Novelty of the paper is that a method of determining power loss of rolling friction was developed, as well as heat balance equivalent circuit for motor with rotor rolling rotor, open and guarded construction for stationary and non-stationary operating mode considering friction in the area of contact of the stator core and the rotor, which was further developed to define the friction significance and its influence on the processes in motor. Degree of implementation - Magdeburg University named after Otto von Guericke (Germany, Magdeburg), Mechanical Plant "Kalyazinsky" (Russian Federation, Kalyazin), Department of electrical machines of NTU "KhPI". Scope - pipe fittings of water, gas and oil production enterprises, agriculture, nuclear and thermal power plants.