ABSTRACT
Temperature rise is a major worry in the short and long term operations of induction machines, which are the most useful industrial work symbols. The mean temperatures at the various core sections of an induction machine are investigated in this study. The thermal network of the system is created, and the algebraic and differential equations for the proposed models are solved to determine the machine’s thermal performance under steady and transient conditions. The temperature rise in an induction machine is estimated using the lumped parameter thermal method. Thermal resistances, thermal capacitances, and power losses are used to achieve this strategy. The 7.5kW machine is separated geometrically into a number of lumped components to examine the thermal process, each component having bulk thermal storage, heat generation, and linkages. Dimensional data, thermal properties of the materials used in the design, and constant heat transfer coefficients are used to create the lumped parameters. The steady-state thermal circuit consists of thermal resistances and heat sources connected between the component nodes, whereas the thermal capacitances were utilized in addition for transient analysis to account for the change in internal energy of the body over time. Response curves illustrating the projected temperature rise for the induction machine core parts were generated during the simulation using MATLAB. The influence of the decretization level on symmetry was investigated using two different thermal models, the SIM and the LIM, which include eleven and thirteen nodes, respectively.
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