A novel high torque and low weight segmented switched reluctance motor

Naresh Vattikuti, Vandana Rallabandi, B. G. Fernandes

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

31 Scopus citations

Abstract

Switched reluctance motors (SRM) have advantages of low manufacturing cost, rugged and simple construction and lesser switches in drive circuit. However, some of its disadvantages are noise, torque ripple and low torque per unit volume. A few of these limitations, such as noise and low torque to volume have been mitigated in the segmented switched reluctance machine (SSRM), which uses a full-pitched winding. It is established that SSRM can give upto 40% more torque than variable reluctance switched reluctance motor (VRSRM) for the same frame size. In this paper, it is proved that if magnetic circuit of SSRM is operated in the linear region of the B-H curve there is further increase in the torque. But this results in an increase in the active weight of iron because of the higher stator yoke thickness required for this purpose. In this paper, a novel segmented switched reluctance machine is proposed. This machine has circular slots in the stator and henceforth will be referred to as circular slot segmented switched reluctance machine (CSSSRM). In CSSSRM, flux in the stator and rotor is forced to follow a circular path, thereby increasing the average torque and reducing the iron used as compared to VRSRM and SSRM. The effect of the variation in geometric parameters on the average torque is examined through finite element analysis. Comparison of CSSSRM with VRSRM and SSRM is also carried out. For the same frame size it is found that the increase in torque over VRSRM is about 62% when the magnetic circuit is operated in the linear region of the B-H curve. Further, Volt-Ampere rating of CSSSRM is predicted.

Original languageEnglish
Title of host publicationPESC '08 - 39th IEEE Annual Power Electronics Specialists Conference - Proceedings
Pages1223-1228
Number of pages6
DOIs
StatePublished - 2008
Externally publishedYes
EventPESC '08 - 39th IEEE Annual Power Electronics Specialists Conference - Rhodes, Greece
Duration: Jun 15 2008Jun 19 2008

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
ISSN (Print)0275-9306

Conference

ConferencePESC '08 - 39th IEEE Annual Power Electronics Specialists Conference
Country/TerritoryGreece
CityRhodes
Period06/15/0806/19/08

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