Effect of High Temperature on Electromagnetic Performance of Canned Induction Motor

The progress in material science, especially in polymer technology has enabled continual increase in power density of electrical machines over the last century. However, this continual improvement has been halted by the thermal application limit of polyimide, i.e., 240 °C. And hence the experience of industry in design and manufacturing of electrical machines beyond this temperature is very limited. Motors suitable for continuous operation at higher temperature will enable increase in power density in one hand, and enable elimination of several components and sub-systems (e.g., motor cooler, heat exchangers) on the other. Hence the reliability of the machines can be improved which is very crucial for special applications such as in canned motor pumps in nuclear reactor cooling application, surface transportation, and aeronautical applications. In the present work a detailed FEA study was carried outto investigate the impact of temperature rise on different performance parameters of an induction motor for a canned motor pump application.