Magnetic bearing technology for industrial bearingless motor systems

Nicholas R. Hemenway; Henrik Gjemdal; Eric L. Severson

doi:10.1109/WEMDCD.2019.8887803

Magnetic bearing technology for industrial bearingless motor systems

Nicholas R. Hemenway, Henrik Gjemdal, Eric L. Severson

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Scopus citations

Abstract

This paper investigates combined radial axial magnetic bearing (CRAMB) technology as an enabling component for shafted bearingless motor systems. The unique requirements of high speed bearingless motors designed for significant power levels are used to guide a literature review on CRAMB designs. Fundamental bearing topology aspects are identified and compared. Based on the outcome of this review, a new CRAMB topology is proposed and developed to meet the needs of a bearingless motor. Key features of the proposed design include a three pole radial force stage (driven by a three phase motor drive) and utilization of an optimal bias flux that improves radial force density by approximately 15% (improved rotor dynamics). It is shown that compared to a conventional four pole side-by-side CRAMB, this topology decreases the bearing shaft length and requires two fewer power electronic switches (6 instead of 8).

Original language	English (US)
Title of host publication	Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	51-58
Number of pages	8
ISBN (Electronic)	9781538681077
DOIs	https://doi.org/10.1109/WEMDCD.2019.8887803
State	Published - Apr 2019
Externally published	Yes
Event	2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019 - Athens, Greece Duration: Apr 22 2019 → Apr 23 2019

Publication series

Name	Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019

Conference

Conference	2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019
Country/Territory	Greece
City	Athens
Period	4/22/19 → 4/23/19

Bibliographical note

Funding Information:
The authors would like to acknowledge the support of the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC). N. R. Hemenway is with the Department of Mechanical Engineering, University of Wisconsin, Madison, WI 53706 USA. H. Gjemdal is with the Department of Electric Power Engineering, NTNU, Trondheim N-7491 Norway. E. L. Severson is with the Electric and Computer Engineering Department, University of Wisconsin, Madison, WI 53706 USA (e-mail: eric.severson@wisc.edu).

Publisher Copyright:
© 2019 IEEE.

Keywords

Bearingless motor
FEA
High speed
Magnetic bearing
Magnetic suspension

Publisher link

10.1109/WEMDCD.2019.8887803

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Cite this

Hemenway, N. R., Gjemdal, H., & Severson, E. L. (2019). Magnetic bearing technology for industrial bearingless motor systems. In Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019 (pp. 51-58). Article 8887803 (Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WEMDCD.2019.8887803

Magnetic bearing technology for industrial bearingless motor systems. / Hemenway, Nicholas R.; Gjemdal, Henrik; Severson, Eric L.
Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 51-58 8887803 (Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hemenway, NR, Gjemdal, H & Severson, EL 2019, Magnetic bearing technology for industrial bearingless motor systems. in Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019., 8887803, Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019, Institute of Electrical and Electronics Engineers Inc., pp. 51-58, 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019, Athens, Greece, 4/22/19. https://doi.org/10.1109/WEMDCD.2019.8887803

Hemenway NR, Gjemdal H, Severson EL. Magnetic bearing technology for industrial bearingless motor systems. In Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 51-58. 8887803. (Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019). doi: 10.1109/WEMDCD.2019.8887803

Hemenway, Nicholas R. ; Gjemdal, Henrik ; Severson, Eric L. / Magnetic bearing technology for industrial bearingless motor systems. Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019. Institute of Electrical and Electronics Engineers Inc., 2019. pp. 51-58 (Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2019).

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abstract = "This paper investigates combined radial axial magnetic bearing (CRAMB) technology as an enabling component for shafted bearingless motor systems. The unique requirements of high speed bearingless motors designed for significant power levels are used to guide a literature review on CRAMB designs. Fundamental bearing topology aspects are identified and compared. Based on the outcome of this review, a new CRAMB topology is proposed and developed to meet the needs of a bearingless motor. Key features of the proposed design include a three pole radial force stage (driven by a three phase motor drive) and utilization of an optimal bias flux that improves radial force density by approximately 15% (improved rotor dynamics). It is shown that compared to a conventional four pole side-by-side CRAMB, this topology decreases the bearing shaft length and requires two fewer power electronic switches (6 instead of 8).",

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AB - This paper investigates combined radial axial magnetic bearing (CRAMB) technology as an enabling component for shafted bearingless motor systems. The unique requirements of high speed bearingless motors designed for significant power levels are used to guide a literature review on CRAMB designs. Fundamental bearing topology aspects are identified and compared. Based on the outcome of this review, a new CRAMB topology is proposed and developed to meet the needs of a bearingless motor. Key features of the proposed design include a three pole radial force stage (driven by a three phase motor drive) and utilization of an optimal bias flux that improves radial force density by approximately 15% (improved rotor dynamics). It is shown that compared to a conventional four pole side-by-side CRAMB, this topology decreases the bearing shaft length and requires two fewer power electronic switches (6 instead of 8).

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Magnetic bearing technology for industrial bearingless motor systems

Abstract

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