Geometry based reduced order thermal model for totally enclosed machines

In this work, a general simplified thermal model for totally enclosed variable speed radial machines is proposed. The parameters of the thermal model are calculated with simple equations based on the geometrical dimensions and material of the electrical machine. In this paper, the design procedure is described in detail and the obtained results are compared with test bench and full order model results. The model has been tested on three different induction machines and two permanent magnet machines.