Open AccessConceptual design of sleeve rotor synchronous reluctance motor for traction applications
Author(s) -
Reddy Patel Bhageerath,
Grace Kevin,
ElRefaie Ayman
Publication year - 2016
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2015.0266
Subject(s) - magnetic reluctance , torque , magnet , automotive engineering , reluctance motor , traction (geology) , rotor (electric) , traction motor , torque ripple , robustness (evolution) , computer science , mechanical engineering , engineering , switched reluctance motor , direct torque control , electrical engineering , induction motor , voltage , physics , biochemistry , chemistry , gene , thermodynamics
Synchronous reluctance machines are very appealing for high speed traction motor design due to their robustness, simple structure, absence of magnets, and simple control. The absence of magnets means that synchronous reluctance (SynRel) machines are not susceptible to price variability and sustainability of rare‐earth materials. Moreover, there are no concerns about demagnetisation or uncontrolled generation mode. However, the challenge of achieving a good constant power to speed ratio is dependent on the mechanical aspects of the design. Conventional SynRel designs perform poorly compared with the permanent magnet machines due to the presence of bridges and/or centre posts in absence of the magnets to help saturate these regions. In this case, the challenge of rotor mechanical retention is addressed with the help of a sleeve on the rotor to reduce the need for bridges and/or centre posts. Design optimisation including the mechanical aspects of the sleeve is presented in this study. The final design with a sleeve will be shown to be superior to a conventional design in terms of power density, rotor losses, saliency and torque ripple.