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Thermal properties are a key issue in many applications associated with electrical machines. Because of its special configuration, an axial-flux electrical machine usually uses self-ventilation. However, this cooling method has a significant impact degrading the machine operating characteristics, and thus, an independent cooling system is desirable. The focus of this paper is on the steady-state thermal...
Thermal modeling of a 100 kW radial flux permanent magnet electrical machine is studied and verified by experiments. The traction machine has hybrid cooling. A simplified thermal model based on Computational Fluid Dynamics (CFD) was used to analyze the temperature distribution throughout the machine. The machine has a water jacket and adopts potting materials around the end-windings. The potting materials...
The main objective of this paper is to investigate the potential and effectiveness of direct oil cooling of a PMSM. The lumped parameters thermal network (LPTN), the thermostatic FEM model, and Computational Fluid Dynamics (CFD) model are built. The results of modeling are compared. The pros and cons of each modeling technique are briefly discussed. The detailed flow modeling by means of CFD allows...
Direct water cooling has been used only in large size turbo generators. The method might, however, offer interesting possibilities also in high torque applications. The performance of different cooling fluids for internal liquid cooling of windings is assessed. The arctic operating conditions of machine place special requirements for the fluid thus pure water can not be used for cooling. It is found...
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