Rotor Shaping Method for Torque Ripple Mitigation in Variable Flux Reluctance Machines

In this paper, four rotor shaping methods, i.e., eccentric circular, inverse cosine, inverse cosine with third harmonic, and multi-step shaping methods, are developed and compared for torque ripple mitigation in variable flux reluctance machines (VFRMs). By using a 6-stator-pole/7-rotor-pole (6/7) V...

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Veröffentlicht in:IEEE transactions on energy conversion 2018-09, Vol.33 (3), p.1579-1589
Hauptverfasser: Huang, L. R., Feng, J. H., Guo, S. Y., Li, Y. F., Shi, J. X., Zhu, Z. Q.
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container_end_page 1589
container_issue 3
container_start_page 1579
container_title IEEE transactions on energy conversion
container_volume 33
creator Huang, L. R.
Feng, J. H.
Guo, S. Y.
Li, Y. F.
Shi, J. X.
Zhu, Z. Q.
description In this paper, four rotor shaping methods, i.e., eccentric circular, inverse cosine, inverse cosine with third harmonic, and multi-step shaping methods, are developed and compared for torque ripple mitigation in variable flux reluctance machines (VFRMs). By using a 6-stator-pole/7-rotor-pole (6/7) VFRM as an example, the design criterions and capabilities of these four methods are illustrated. It is found that all the rotor shaping methods are capable of torque ripple mitigation and applicable to all the VFRMs except those with 6 k /(6 i ± 2) k ( k , i = 1, 2, 3...) stator/rotor pole combinations. Moreover, the inverse cosine with third harmonic and multi-step shaping methods are found to have the best performance. They are able to reduce the torque ripple by 90% at a cost of only 3% torque density reduction. A 6/7 VFRM with both conventional and shaped rotors is prototyped and tested for verification.
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Moreover, the inverse cosine with third harmonic and multi-step shaping methods are found to have the best performance. They are able to reduce the torque ripple by 90% at a cost of only 3% torque density reduction. 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Q.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rotor Shaping Method for Torque Ripple Mitigation in Variable Flux Reluctance Machines</atitle><jtitle>IEEE transactions on energy conversion</jtitle><stitle>TEC</stitle><date>2018-09</date><risdate>2018</risdate><volume>33</volume><issue>3</issue><spage>1579</spage><epage>1589</epage><pages>1579-1589</pages><issn>0885-8969</issn><eissn>1558-0059</eissn><coden>ITCNE4</coden><abstract>In this paper, four rotor shaping methods, i.e., eccentric circular, inverse cosine, inverse cosine with third harmonic, and multi-step shaping methods, are developed and compared for torque ripple mitigation in variable flux reluctance machines (VFRMs). By using a 6-stator-pole/7-rotor-pole (6/7) VFRM as an example, the design criterions and capabilities of these four methods are illustrated. 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subjects Average torque
Harmonic analysis
Product design
Reluctance machinery
Reluctance machines
rotor shaping
Rotors
Stator windings
Stators
Torque
Torque measurement
torque ripple
Vacuum cleaners
variable flux reluctance machine (VFRM)
title Rotor Shaping Method for Torque Ripple Mitigation in Variable Flux Reluctance Machines
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