Influence of the Cross-Section of the Ribs on the Cooling of the Stator of an Electric Machine

Cooling design is one of the most important tasks that arise during the overall design of electrical machines. In order to maintain reliability and efficiency, it is crucial to ensure the optimal thermal condition. Despite the liquid and cryogenic cooling effectiveness, air cooling still has its niche due to its simplicity which is very important for aircraft applications. This article presents the results of a study that compares different stator casing fins cross-section designs. With the help of computational fluid dynamics, four different variants of the cross-section were considered and compared. The results showed that optimal stator casing thermal condition can be achieved by means of a single rectangular hole design.