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Magnetic Structure Based Improvement of Output Torque of Switched Reluctance Machine: A Review
IETE Technical Review ( IF 2.4 ) Pub Date : 2022-06-20 , DOI: 10.1080/02564602.2022.2086930
Thirumalasetty Mouli 1 , Gopalaratnam Narayanan 1
Affiliation  

This paper reviews research reported over the last three decades on enhancing the torque density of a switched reluctance machine (SRM) through improved magnetic structure of the machine. To this effect, various pole configurations, modifications to pole geometry such as introduction of teeth in stator poles, tapering of stator and rotor poles, non-uniform airgap, introduction of flux barriers in the poles, and segmental rotor are studied. All salient points in the review are supported by comparative analyses based on finite element analysis (FEA) of candidate machine designs. Increasing the number of rotor poles and introduction of teeth in stator poles enhance the torque density at low current density, while increasing multiplicity is beneficial at high current densities. Quantum of electromechanical energy conversion per individual stroke can be increased by tapering of poles, non-uniform airgap and by introduction of flux barrier in the poles. A segmental rotor can increase the stator winding flux-linkage for a given excitation, and thereby, the torque output of the machine.



中文翻译:

基于磁结构的开关磁阻电机输出转矩改进综述

本文回顾了过去 30 年关于通过改进电机的磁结构来提高开关磁阻电机 (SRM) 的转矩密度的研究报告。为此,研究了各种磁极配置、磁极几何形状的修改,例如在定子磁极中引入齿、定子和转子磁极逐渐变细、不均匀的气隙、在磁极中引入磁通屏障以及分段转子。基于候选机器设计的有限元分析 (FEA) 的比较分析支持审查中的所有要点。增加转子极数和在定子极中引入齿可提高低电流密度下的转矩密度,而增加多重性有利于高电流密度。通过磁极的锥形化、不均匀的气隙以及通过在磁极中引入磁通屏障,可以增加每个冲程的机电能量转换量。分段转子可以增加给定励磁的定子绕组磁链,从而增加电机的扭矩输出。

更新日期:2022-06-20
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