Open AccessInvestigating the Magnetic Characteristics of 12/8 Switched Reluctance Motor for Enhanced Starting Torque
Author(s) -
Emmanuel C. Abunike,
Gideon Umoh,
Imo E. Nkan,
Ogbonnaya I. Okoro
Publication year - 2021
Publication title -
nigerian journal of technological development
Language(s) - English
Resource type - Journals
ISSN - 2437-2110
DOI - 10.4314/njtd.v18i1.10
Subject(s) - switched reluctance motor , torque ripple , reluctance motor , control theory (sociology) , torque , torque motor , direct torque control , torque density , electric motor , materials science , magnetic field , physics , induction motor , engineering , computer science , electrical engineering , voltage , thermodynamics , control (management) , quantum mechanics , artificial intelligence
The switched reluctance motor (SRM) is among the special purpose electric machine family. It is simple in construction and avoids use of magnet so it is cheap to manufacture. The magnetic characteristics and simulation of three phase 12/8 switched reluctance motor (SRM) for enhanced starting torque is presented. The motor was analyzed using finite element technique (FET) and it was improved by focusing on the impact of important geometrical parameters on torque and efficiency. From the simulated results, the motor attained maximum efficiency of 91.7% at a speed of 1648.6 rpm and recorded a maximum torque of 321.1 Nm at a speed of 34.4 rpm. The magnetic flux lines and densities were also recorded. The maximum and minimum magnetic flux lines of the motor as observed were 1.2x10-3 Wb/m and -8.5x10-4 Wb/m respectively while the respective values of the maximum and minimum magnetic flux density of the motor were 3.8x10-1 T and 2.11x10-9 T. The results show that most of the field energy is confined within the motor and also concentrated in the air gap region of the motor. Dynamic analysis of the motor was performed for 0.02 s at a damping coefficient of 0.71 μNms/rad. The results showed that the motor has lower torque ripple. The preference to use this type of motor where high speed operation and better starting torque are needed has been highlighted in this study.
Keywords: Switched reluctance motor, static characteristics, transient analysis, torque, magnetic flux