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Homopolar Bearingless Slice Motor With Flux-Biasing Halbach Arrays
In this article, we present a new configuration of bearingless slice motor that levitates and rotates a ring-shaped solid steel reluctance rotor. The rotor is 50 mm in diameter and has salient features on the outer surface. Symmetric sets of Halbach magnet arrays, mounted on the tips of stator teeth...
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Published in: | IEEE transactions on industrial electronics (1982) 2020-09, Vol.67 (9), p.7757-7766 |
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container_title | IEEE transactions on industrial electronics (1982) |
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creator | Noh, Minkyun Trumper, David L. |
description | In this article, we present a new configuration of bearingless slice motor that levitates and rotates a ring-shaped solid steel reluctance rotor. The rotor is 50 mm in diameter and has salient features on the outer surface. Symmetric sets of Halbach magnet arrays, mounted on the tips of stator teeth, establish a homopolar bias flux around the rotor. The bias flux passively stabilizes the rotor in the out-of-plane tilts and axial translation, whereas the rotor's radial translations are actively stabilized by feedback control. The rotor saliencies spatially modulate the air-gap bias flux such that the resulting torque-current relationship is similar to that of permanent-magnet synchronous machines. We have designed, built, and tested a prototype bearingless motor and control system. The prototype system achieves a torque constant of 14.9 mNm/A, maximum speed of 5500 r/min, and suspension bandwidth of 84 Hz with a phase margin of 11.3°. The rated torque and speed are 26.8 mNm and 3486 r/min, respectively, and the axial and tilting passive stiffnesses are 15.3 N/mm and 34.4 mNm/°, respectively. |
doi_str_mv | 10.1109/TIE.2019.2942512 |
format | article |
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The rotor is 50 mm in diameter and has salient features on the outer surface. Symmetric sets of Halbach magnet arrays, mounted on the tips of stator teeth, establish a homopolar bias flux around the rotor. The bias flux passively stabilizes the rotor in the out-of-plane tilts and axial translation, whereas the rotor's radial translations are actively stabilized by feedback control. The rotor saliencies spatially modulate the air-gap bias flux such that the resulting torque-current relationship is similar to that of permanent-magnet synchronous machines. We have designed, built, and tested a prototype bearingless motor and control system. The prototype system achieves a torque constant of 14.9 mNm/A, maximum speed of 5500 r/min, and suspension bandwidth of 84 Hz with a phase margin of 11.3°. The rated torque and speed are 26.8 mNm and 3486 r/min, respectively, and the axial and tilting passive stiffnesses are 15.3 N/mm and 34.4 mNm/°, respectively.</description><identifier>ISSN: 0278-0046</identifier><identifier>EISSN: 1557-9948</identifier><identifier>DOI: 10.1109/TIE.2019.2942512</identifier><identifier>PMID: 33746334</identifier><identifier>CODEN: ITIED6</identifier><language>eng</language><publisher>United States: IEEE</publisher><subject>Air gaps ; Arrays ; Bearingless motors ; Bias ; Feedback control ; Flux ; flux biasing ; homopolar machines ; Magnetic flux ; Magnetic levitation ; Permanent magnets ; Prototypes ; Reluctance motors ; Rotors ; slice motors ; Stator windings ; Synchronous machines ; Torque ; Translations ; Windings</subject><ispartof>IEEE transactions on industrial electronics (1982), 2020-09, Vol.67 (9), p.7757-7766</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c444t-e64dac63e2146dd57608712148a1ad984923c10cdc064c52b282c88349df77013</citedby><cites>FETCH-LOGICAL-c444t-e64dac63e2146dd57608712148a1ad984923c10cdc064c52b282c88349df77013</cites><orcidid>0000-0001-5358-5450 ; 0000-0001-5876-8854</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8848839$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>230,315,786,790,891,27957,27958,55147</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33746334$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Noh, Minkyun</creatorcontrib><creatorcontrib>Trumper, David L.</creatorcontrib><title>Homopolar Bearingless Slice Motor With Flux-Biasing Halbach Arrays</title><title>IEEE transactions on industrial electronics (1982)</title><addtitle>TIE</addtitle><addtitle>IEEE Trans Ind Electron</addtitle><description>In this article, we present a new configuration of bearingless slice motor that levitates and rotates a ring-shaped solid steel reluctance rotor. The rotor is 50 mm in diameter and has salient features on the outer surface. Symmetric sets of Halbach magnet arrays, mounted on the tips of stator teeth, establish a homopolar bias flux around the rotor. The bias flux passively stabilizes the rotor in the out-of-plane tilts and axial translation, whereas the rotor's radial translations are actively stabilized by feedback control. The rotor saliencies spatially modulate the air-gap bias flux such that the resulting torque-current relationship is similar to that of permanent-magnet synchronous machines. We have designed, built, and tested a prototype bearingless motor and control system. The prototype system achieves a torque constant of 14.9 mNm/A, maximum speed of 5500 r/min, and suspension bandwidth of 84 Hz with a phase margin of 11.3°. The rated torque and speed are 26.8 mNm and 3486 r/min, respectively, and the axial and tilting passive stiffnesses are 15.3 N/mm and 34.4 mNm/°, respectively.</description><subject>Air gaps</subject><subject>Arrays</subject><subject>Bearingless motors</subject><subject>Bias</subject><subject>Feedback control</subject><subject>Flux</subject><subject>flux biasing</subject><subject>homopolar machines</subject><subject>Magnetic flux</subject><subject>Magnetic levitation</subject><subject>Permanent magnets</subject><subject>Prototypes</subject><subject>Reluctance motors</subject><subject>Rotors</subject><subject>slice motors</subject><subject>Stator windings</subject><subject>Synchronous machines</subject><subject>Torque</subject><subject>Translations</subject><subject>Windings</subject><issn>0278-0046</issn><issn>1557-9948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNpdkcGLUzEQh4Mobl29C4I88OLl1UkyeUkuwnbZtQsrHlzxGNK8dJslfanJe-L-96a0FvU0hPnmx0w-Ql5TmFMK-sPdzdWcAdVzppEJyp6QGRVCtlqjekpmwKRqAbA7Iy9KeQCgKKh4Ts44l9hxjjOyWKZt2qVoc7PwNofhPvpSmq8xON98TmPKzfcwbprrOP1qF8GWSjRLG1fWbZqLnO1jeUmerW0s_tWxnpNv11d3l8v29sunm8uL29Yh4tj6DnvrOu4Zxa7vhexASVofylLba4WacUfB9Q46dIKtmGJOKY66X0sJlJ-Tj4fc3bTa-t75Ycw2ml0OW5sfTbLB_NsZwsbcp59Gaim5YjXg_TEgpx-TL6PZhuJ8jHbwaSqGCeCdkJrv0Xf_oQ9pykM9zzAEShkqgErBgXI5lZL9-rQMBbMXZKogsxdkjoLqyNu_jzgN_DFSgTcHIHjvT22lsH6F5r8B99ySxQ</recordid><startdate>20200901</startdate><enddate>20200901</enddate><creator>Noh, Minkyun</creator><creator>Trumper, David L.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-5358-5450</orcidid><orcidid>https://orcid.org/0000-0001-5876-8854</orcidid></search><sort><creationdate>20200901</creationdate><title>Homopolar Bearingless Slice Motor With Flux-Biasing Halbach Arrays</title><author>Noh, Minkyun ; Trumper, David L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c444t-e64dac63e2146dd57608712148a1ad984923c10cdc064c52b282c88349df77013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Air gaps</topic><topic>Arrays</topic><topic>Bearingless motors</topic><topic>Bias</topic><topic>Feedback control</topic><topic>Flux</topic><topic>flux biasing</topic><topic>homopolar machines</topic><topic>Magnetic flux</topic><topic>Magnetic levitation</topic><topic>Permanent magnets</topic><topic>Prototypes</topic><topic>Reluctance motors</topic><topic>Rotors</topic><topic>slice motors</topic><topic>Stator windings</topic><topic>Synchronous machines</topic><topic>Torque</topic><topic>Translations</topic><topic>Windings</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Noh, Minkyun</creatorcontrib><creatorcontrib>Trumper, David L.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>IEEE transactions on industrial electronics (1982)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Noh, Minkyun</au><au>Trumper, David L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Homopolar Bearingless Slice Motor With Flux-Biasing Halbach Arrays</atitle><jtitle>IEEE transactions on industrial electronics (1982)</jtitle><stitle>TIE</stitle><addtitle>IEEE Trans Ind Electron</addtitle><date>2020-09-01</date><risdate>2020</risdate><volume>67</volume><issue>9</issue><spage>7757</spage><epage>7766</epage><pages>7757-7766</pages><issn>0278-0046</issn><eissn>1557-9948</eissn><coden>ITIED6</coden><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>In this article, we present a new configuration of bearingless slice motor that levitates and rotates a ring-shaped solid steel reluctance rotor. The rotor is 50 mm in diameter and has salient features on the outer surface. Symmetric sets of Halbach magnet arrays, mounted on the tips of stator teeth, establish a homopolar bias flux around the rotor. The bias flux passively stabilizes the rotor in the out-of-plane tilts and axial translation, whereas the rotor's radial translations are actively stabilized by feedback control. The rotor saliencies spatially modulate the air-gap bias flux such that the resulting torque-current relationship is similar to that of permanent-magnet synchronous machines. We have designed, built, and tested a prototype bearingless motor and control system. The prototype system achieves a torque constant of 14.9 mNm/A, maximum speed of 5500 r/min, and suspension bandwidth of 84 Hz with a phase margin of 11.3°. The rated torque and speed are 26.8 mNm and 3486 r/min, respectively, and the axial and tilting passive stiffnesses are 15.3 N/mm and 34.4 mNm/°, respectively.</abstract><cop>United States</cop><pub>IEEE</pub><pmid>33746334</pmid><doi>10.1109/TIE.2019.2942512</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0001-5358-5450</orcidid><orcidid>https://orcid.org/0000-0001-5876-8854</orcidid><oa>free_for_read</oa></addata></record> |
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source | IEEE Electronic Library (IEL) Journals |
subjects | Air gaps Arrays Bearingless motors Bias Feedback control Flux flux biasing homopolar machines Magnetic flux Magnetic levitation Permanent magnets Prototypes Reluctance motors Rotors slice motors Stator windings Synchronous machines Torque Translations Windings |
title | Homopolar Bearingless Slice Motor With Flux-Biasing Halbach Arrays |
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