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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...
90 kW frequency converter driven synchronous reluctance machine losses are determined simultaneously with the input-output powers and with the calorimetric method. Uncertainty of both measurement methods is analyzed and discussed. Calorimetric measurement system that is capable to determine the losses of the motor frame size up to 315 is introduced.
This paper investigates the effectiveness of direct oil cooling of a PMSM by modeling flows of coolant inside the machine using Computational Fluid Dynamics (CFD) software. Conjugated fluid-solid heat transfer modeling with anisotropic conductivity coefficients in solids and turbulent fluid flow was performed. The detailed flow modeling allows precise determination of possible cooling approaches and...
In motion control, high servomotor over loadings are required to maximize the acceleration and deceleration rates and thereby the process throughput. Typically the pull-out torques of the induction servomotors vary in between 3...5 times the rated value, while with standard industrial motors, the ratio is typically between 1.6...3. As the stator copper losses are proportional to the stator current...
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