Axial flux machine design taking into account cooling and convection heat transfer

To be used for the hybridization of thermal vehicles electric motor (HEV) has to respect strict size specification. Thanks to its small axial length, axial flux machine is a good candidate for this application. A first design of an axial flux machine for HEV is make but unluckily does not meet specifications. The impact of the current density as well as the heat transfer through the air gap convection on the performances and size are investigated in order to reach specifications.