Thermal characteristics analysis of single-winding bearingless switched reluctance motor

Loss and temperature rise are important parameters for performance evaluation of bearingless switched reluctance machine. In this paper, a 12/8 outer-rotor single-winding bearingless switched reluctance motor (SWBSRM) is studied for its loss and temperature rise under high speed operation. Firstly, a 2D finite element model is established by using Ansoft Maxwell, and the magnetic flux density waveform and the variation law of different parts of the core are obtained. Furthermore, various losses including core loss and copper loss are coupled to the temperature field analysis module as a heat source. Thirdly, the thermal model is established by Motor-CAD, and the transient and stable temperature field is simulated and analyzed. Finally, the temperature field distributions of the core and windings are obtained. © 2019, Electromagnetics Academy. All rights reserved.