Enhanced cooling of advanced electrical machines

In high-performance applications, a constant increase of power densities in electrical machines leads to a proportional rise in temperature, which significantly affects its performance and life expectancy. To reduce the temperature rise impact on processing performance, usually, a cooling system will be equipped on the high-power density electrical machine, which can take away the heat in time keeping the machines in the best temperature range. The idea of this paper: primarily is to analyze the heating and heat transfer of stators of electrical machines, consecutively employ parameters in different operating conditions; by using computational fluid dynamics (CFD) simulation to find the thermal parameters of the cooling system. Based on the simulation, the influence of the cooling channel position on the cooling effect is evaluated, which provides a reference for the design of the stator. Also, the impact of the coolant flow on the cooling effect was analyzed. The simulation results are compared with the theoretical calculation results. Some enhancements of heat exchange within cooling tube are adopted. The cooling effect under different designs is analyzed and evaluated based on several established performance criteria.