Abstract

Torque ripple is a major problem in Switched Reluctance Machine (SRM). Despite the high torque ripple and vibration, SRM has many advantages over many other machines. In this paper, the torque ripple minimization control techniques commonly used are reviewed. Torque ripple minimization can be achieved through machine magnetic design or through electronic control. Both techniques have advantages and disadvantages which will be discussed. Torque ripple production is mostly caused by the physical structure of the SRM and the basic principle of its operation. So, the basics of torque production and the physical structure of the SRM is also reviewed as part of this paper.

Highlights

  • Switched Reluctance Machine is one of the earliest electrical machine that was built – dating back to early 19th century [1]

  • Torque ripple which results in high vibration and acoustic noise may not be a viable aspect of the Switched Reluctance Machine (SRM) for high performance applications

  • As such minimizing torque ripple in the SRM is essential for SRM operation in commercial applications

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Summary

INTRODUCTION

Switched Reluctance Machine is one of the earliest electrical machine that was built – dating back to early 19th century [1]. In [1], T.J.E Miller has described the SRM as an electric motor where torque is produced by the tendency of its moveable part (the rotor) to move to the position where the inductance of the winding is maximized. As such the term switched reluctance does not refer to the switching of the reluctance but the switching of the phase current that energizes the stator poles of the machine. The SRM is known for its simple structure It is a doubly salient machine and does not contain any permanent magnets unlike Permanent Magnet Machines (PMM) and it only has windings on its stator.

Torque Production in SRM
Torque Ripple Minimization through Machine Design
CAUSES OF TORQUE RIPPLE
Torque Ripple Minimization through Control Strategy Improvements
Findings
CONCLUSION

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