High Performance Cooling of Traction Brushless Machines By Alessandro Acquaviva, Division of Electric Power Engineering, Chalmers University of Technology

The work presented in this thesis covers several aspects of traction electric drive system design. Particular attention is given to the traction electrical machine with focus on the cooling solution, thermal modelling and testing.
A 60 kW peak power traction machine is designed to achieve high power density and high efficiency thanks to direct oil cooling. The machine selected has a tooth coil winding, also defined as non-overlapping fractional slot concentrated winding. This winding concept is state…

Read and dowload complete thesis: https://research.chalmers.se/publication/521984