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The Scientific World Journal
Volume 2015, Article ID 393629, 13 pages
Research Article

R Dump Converter without DC Link Capacitor for an 8/6 SRM: Experimental Investigation

1Department of Electrical and Electronics Engineering, Anna University, Chennai, Tamil Nadu 600025, India
2Department of Electronics and Instrumentation Engineering, RMK Engineering College, Kavaraipettai, Tamil Nadu 601206, India

Received 22 August 2014; Revised 27 November 2014; Accepted 3 December 2014

Academic Editor: Xiangdang Xue

Copyright © 2015 Pasumalaithevan Kavitha and Bhaskaran Umamaheswari. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The objective of this paper is to investigate the performance of 8/6 switched reluctance motor (SRM) when excited with sinusoidal voltage. The conventional R dump converter provides DC excitation with the help of capacitor. In this paper the converter used is the modified R dump converter without DC link capacitor providing AC or sinusoidal excitation. Torque ripple and speed ripple are investigated based on hysteresis current control. Constant and sinusoidal current references are considered for comparison in both DC and AC excitation. Extensive theoretical and experimental investigations are made to bring out the merits and demerits of AC versus DC excitation. It is shown that the constructionally simple SRM can be favorably controlled with simple R dump converter with direct AC excitation without need for DC link capacitor. A 4-phase 8/6 0.5 kW SRM is used for experimentation.