International Journal of Electrical and Computer Engineering (IJECE) Vol. 9, No. 6, December 2019, pp. 5095~5106 ISSN: 2088-8708, DOI: 10.11591/ijece.v9i6.pp5095-5106  5095 Journal homepage: http://iaescore.com/journals/index.php/IJECE A simplified hysteresis current control for cascaded converter fed switched reluctance motor Anuradha Devi Tellapati, Malligunta Kiran Kumar Department of Electrical and Electronics Engineering, Koneru Lakshmaiah Educational Foundation, India Article Info ABSTRACT Article history: Received Nov 17, 2018 Revised Jul 5, 2019 Accepted Jul 17, 2019 Simple constructional features with no windings on rotor circuit and robustness make switched reluctance motor (SRM) a most used motors in industrial applications. Peak motor voltage rating depends on the rated voltage of the power switches. In conventional asymmetrical converter driving SRM, voltage rating of the motor depends on rating of power electronic switches in converter. Demand to rise the motor rating insists to put pressure on converter switching components which results in increased switching losses. A cascaded converter topology for SRM reduces the rating of switching components as compared to conventional converters for SRM. This paper presents a cascaded converter fed SRM drive with reduced switching losses. The paper presents a simplified hysteresis current control (HCC) for cascaded converter fed SRM. Simplified HCC control method reduces switching losses as HCC is applied to only one bridge of cascaded converter. Though the performance of the SRM remains same with cascaded converter fed SRM with HCC applied to only one bridge or to two bridges and with conventional asymmetrical converter, the switching losses are reduced to a great extent when HCC applied to one bridge of cascaded converter fed SRM. Performance of SRM is illustrated with conventional asymmetrical converter fed SRM and is compared to cascaded converter while HCC applied to only one bridge and applied to two bridges of cascaded converter. Proposed work is simulated using MATLAB/SIMULINK and results are presented. Keywords: Bridge Cascaded converter Hysteresis current control Switched reluctance motor Copyright © 2019 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Anuradha Devi Tellapati, Department of Electrical & Electronics Engineering, Koneru Lakshmaiah Educational Foundation, Vaddeswaram, Guntur, AP – 522502, India. Email: anuradhadevi.eee@gmail.com 1. INTRODUCTION Switched Reluctance Motors (SRM) have inherent advantages such as simple structure with non winding construction in rotor side, and has a high tolerances, robustness, low cost with no permanent magnet in the structure, and possible operation in high temperatures or in intense temperature variations. The torque production in switched reluctance motor comes from the tendency of the rotor poles to align with the excited stator poles. Without any installation of PM material or winding on its rotor, the SR motor drives enjoy the higher cost-effectiveness and wide-speed operation range, as compared with its counterparts. To be specific, unlike the induction and PM motor drives, SR motor drives can relieve the mechanical problems caused by the centripetal forces at high-speed operation [1-5]. The SR motor drives consist of the doubly salient structure; its reluctance of the magnetic flux path varies along the stator-rotor position. The torque can then be produced based on the ‘minimum reluctance’ rule, i.e. the rotor pole has the tendency to align with the excited stator pole such that the reluctance of the magnetic flux can be minimized.