Improvements in Air Flow in the End Region of a Large Totally Enclosed Fan Cooled Induction Motor

The power density of modern induction machines is constantly increasing due to industry demands and material costs. This gives rise to higher operating temperatures. This paper investigates how the cooling characteristics of the end region of totally enclosed fan cooled induction machines may be enhanced. With the aid of computational fluid dynamics techniques various features in the end region which need particular attention when designing such machines are highlighted. It turns out that computational fluid dynamics tools are indispensable for a proper design exercise