Thermal Modeling of Flux-Switching Permanent-Magnet Machines Considering Anisotropic Conductivity and Thermal Contact Resistance

Analytical Thermal Model for Fast Stator Winding Temperature Prediction

“…As shown in [21], the external surface and the airgap convection coefficients are significant parameters, which are not easy to be determined, mainly because of turbulent air flows and orientation of the electrical machine. Further parameters uncertainties are due to the contact resistances which are significantly dependent on the manufacturing tolerances and operating temperatures [24]. Finally, it has to be pointed out that the Joule losses in the slot are temperature dependent, as the electrical resistance of the winding conductor varies with temperature.…”

Experimentally Calibrated Thermal Stator Modeling of AC Machines for Short-Duty Transient Operation

“…This is predominantly because of the fast computation time of lumped parameter circuits, which is necessary when evaluating performance over extended duty cycles. However critical parameters of these thermal models are difficult to predict without experimental calibration, for example the stator to slot liner interface, stator to housing interface, convection coefficient of the housing, and impregnation 'goodness' inside the slot [11][12][13][14][15]. This data can be sourced from experience with similar machines or previous iterations of the design.…”

Electromagnetic Performance Evaluation of an Outer-Rotor Flux-Switching Permanent Magnet Motor Based on Electrical-Thermal Two-Way Coupling Method

“…However, the simulation process involves 2D and 3D simulations, which are inconvenient, especially for the complex motor structure. In [20,21], the lumped parameter method is considered as an effective way to realize the thermal analysis because it can offer fast and simple computation and also considers different heat-transfer mechanisms, but only the components' temperature distributions (rather than those of the whole motor) are obtained in that method.…”