Faculty Publications

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Author: search.filters.author.Bhaktha, S.Subject: search.filters.subject.Reluctance motors

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    Vibration reduction and intelligent control in SRM using optimised two stage commutation
    (Inderscience Publishers, 2025) Wilson, V.; Latha, P.G.; Jose, N.; Bhaktha, S.
    Switched reluctance motors (SRMs) have grown in popularity in a variety of industrial applications due to their inherent benefits such as high fault-tolerance, simplicity, affordability, and rare-earth free nature. However, the generation of undesirable vibrations due to radial force variations remains a significant challenge. Two stage commutation based on active vibration cancellation (AVC) is an effective method to reduce these vibrations. The focus of this paper is to address the major limitation with two stage commutation, namely the extended tail current causing increased copper loss. This is accomplished with optimal commutation parameters employing particle swarm optimisation (PSO) method. A MATLAB/Simulink model of SRM with vibration signal is developed and is used for demonstrating vibration cancellation. An intelligent control is also implemented which can track the dynamic changes in speed-load conditions. This paper showcases that this approach is an effective solution to reduce the vibrations issues in SRM, thereby improving the overall performance of the motor for industrial applications. © © 2025 Inderscience Enterprises Ltd.
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    Influence of Stator Structure on the Electromagnetic Performance of an In-Wheel Multi-teeth SRM
    (Springer, 2025) Bhaktha, S.; Ramnihor, G.R.; Pitchaimani, J.; Gangadharan, K.V.
    Compared to traditional switched reluctance motor (SRM) topologies, the multi-teeth (MT) SRM topology has been reported to be beneficial for in-wheel motor applications because of its superior torque density, efficiency, with minimized torque ripple. In this paper, a four-phase 8/18 IW-MTSRM with two different stator structures, namely the trapezoidal-shaped stator structure (TSSS) and the Y-shaped stator structure (YSSS) are designed and analyzed. Using two-dimensional (2D) electromagnetic static finite element analysis, the performance metrics including average torque, peak torque capacity, and torque ripple are compared under the condition of constant copper loss. Based on the results obtained, this study attempts to offer guidance and suggestions for choosing an appropriate stator structure among IW-MTSRMs according to the application requirement. To validate the FEA model employed in this study, an 8/18 IW-MTSRM with the TSSS is prototyped and tested experimentally. The experimental results are observed to agree with the FEA model. © The Institution of Engineers (India) 2024.