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- W101305039 abstract "Two thermal resistance network models have been developed for thesteady state radial heat ow an experimental IPMSM. The modelshave been based on published material, but also on some case studieswith the purpose of determining the best choice of methods for certainsituations. In one case study on hollow cylinders, it is concluded thatit is favourable to place nodes with heat sources representing evenlydistributed losses in a point corresponding to the mean radius of theobject, rather than the resistive midpoint. Furthermore it is investigatedwhether the accuracy of a thermal resistance network model canbe improved by increasing the resolution of the node configuration.The result indicates that so is the case, although with some ambiguity.The increased complexity of the high resolution network makes it morebulky however, which is a disadvantage compared to the low resolutionnode configurations.The two network models are used to analyse the IPMSM, and comparedwith a FEM model made in ANSYS Mechanical. A number ofparameters are swept to investigate the machines dependency on somethermally important design characteristics, and also the sensitivity toerrors from uncertain input data, geometry approximations, and otherestimations. Such uncertain parameters are e.g. the interface gapsbetween machine components, the turbulence model in the air gap,and the thermal model of the slots. Regarding the design aspects, itis suggested to strive towards minimising the contact gaps during theassembly, and consider the choice of materials used in the stator slots." @default.
- W101305039 created "2016-06-24" @default.
- W101305039 creator A5071309350 @default.
- W101305039 date "2013-01-01" @default.
- W101305039 modified "2023-09-26" @default.
- W101305039 title "Lumped Parameter Thermal Modelling of Electric Machines" @default.
- W101305039 hasPublicationYear "2013" @default.
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