Design methodology for a special single winding based bearingless switched reluctance motor

Madhurjya Dev Choudhury, Firdausa Ahmed, Gaurav Kumar, Karuna Kalita, Kari Tammi

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Bearingless switched reluctance motors (BSRMs) have both magnetic bearing as well as conventional motor characteristics which make them suitable for diverse industrial applications. This study proposes a design methodology for a BSRM in order to calculate the appropriate geometrical dimensions essential for realising a minimum levitation force at every orientation of rotor. It is based on the stator–rotor overlap angle and helps in reducing the complexities associated with the self-bearing operation of a switched reluctance motor (SRM). Different from a conventional SRM, the motor under study deploys a special single set parallel winding scheme for simultaneous production of torque as well as radial force. An analytical model incorporating this single set winding is developed for calculating the torque and the radial force. The proposed bearingless design is verified by developing a two-dimensional finite-element model of a 12/8 SRM in ANSYS Maxwell.
Original languageEnglish
Number of pages11
Journal The Journal of Engineering
VolumeJune 2017
Publication statusPublished - 1 Jun 2017
MoE publication typeA1 Journal article-refereed


  • magnetic bearing
  • radial force
  • bearingless switched reluctance motor
  • stator-rotor overlap angle


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