Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM

Mark Thiele; Greg Heins

doi:10.1109/ICElMach.2012.6350310

Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM

Mark Thiele, Greg Heins

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper published in Proceedings

Abstract

Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque harmonics resulting from misalignment of the rotor and stator caused by assembly and manufacturing tolerances in an axial flux, fractional pitch PMSM. A simulation method utilizing superposition of a single magnet / single slot interaction has been used previously to decouple manufacturing errors such as magnet placement and stator non-uniformity. This work extends on that previously published by inducing varying degrees of assembly misalignment of the stator and rotor to determine the effect on cogging torque waveforms. Experimental data is presented indicating that increasing degrees of offset misalignment leads to increasing sideband magnitudes in the frequency spectrum. There is good agreement between the simulation method and measured data.

Original language	English
Title of host publication	Proceedings 2012 XXth International Conference on Electrical Machines
Editors	GA Capolini, C Henaux, A Boglietti, B Nogared
Place of Publication	Red Hook, New York USA
Publisher	IEEE, Institute of Electrical and Electronics Engineers
Pages	2969-2974
Number of pages	6
Edition	ISBN 2 - 978-1-4673-0143-5
ISBN (Print)	978-1-4673-0142-8
DOIs	https://doi.org/10.1109/ICElMach.2012.6350310
Publication status	Published - 2012
Event	International Conference on Electrical Machines (ICEM 2012 20th) - Palais des CongrÃ¨s et des Expositions de Marseille, France, Marseille, France Duration: 2 Sep 2012 → 5 Sep 2012 Conference number: 2012 (20th)

Conference

Conference	International Conference on Electrical Machines (ICEM 2012 20th)
Abbreviated title	ICEM
Country	France
City	Marseille
Period	2/09/12 → 5/09/12

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Thiele, M., & Heins, G. (2012). Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM. In GA. Capolini, C. Henaux, A. Boglietti, & B. Nogared (Eds.), Proceedings 2012 XXth International Conference on Electrical Machines (ISBN 2 - 978-1-4673-0143-5 ed., pp. 2969-2974). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ICElMach.2012.6350310

Thiele, Mark ; Heins, Greg. / Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM. Proceedings 2012 XXth International Conference on Electrical Machines. editor / GA Capolini ; C Henaux ; A Boglietti ; B Nogared. ISBN 2 - 978-1-4673-0143-5. ed. Red Hook, New York USA : IEEE, Institute of Electrical and Electronics Engineers, 2012. pp. 2969-2974

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title = "Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM",

abstract = "Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque harmonics resulting from misalignment of the rotor and stator caused by assembly and manufacturing tolerances in an axial flux, fractional pitch PMSM. A simulation method utilizing superposition of a single magnet / single slot interaction has been used previously to decouple manufacturing errors such as magnet placement and stator non-uniformity. This work extends on that previously published by inducing varying degrees of assembly misalignment of the stator and rotor to determine the effect on cogging torque waveforms. Experimental data is presented indicating that increasing degrees of offset misalignment leads to increasing sideband magnitudes in the frequency spectrum. There is good agreement between the simulation method and measured data.",

author = "Mark Thiele and Greg Heins",

year = "2012",

doi = "10.1109/ICElMach.2012.6350310",

language = "English",

isbn = "978-1-4673-0142-8",

pages = "2969--2974",

editor = "GA Capolini and C Henaux and A Boglietti and B Nogared",

booktitle = "Proceedings 2012 XXth International Conference on Electrical Machines",

publisher = "IEEE, Institute of Electrical and Electronics Engineers",

address = "United States",

edition = "ISBN 2 - 978-1-4673-0143-5",

note = "International Conference on Electrical Machines (ICEM 2012 20th), ICEM ; Conference date: 02-09-2012 Through 05-09-2012",

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Thiele, M & Heins, G 2012, Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM. in GA Capolini, C Henaux, A Boglietti & B Nogared (eds), Proceedings 2012 XXth International Conference on Electrical Machines. ISBN 2 - 978-1-4673-0143-5 edn, IEEE, Institute of Electrical and Electronics Engineers, Red Hook, New York USA, pp. 2969-2974, International Conference on Electrical Machines (ICEM 2012 20th), Marseille, France, 2/09/12. https://doi.org/10.1109/ICElMach.2012.6350310

Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM. / Thiele, Mark; Heins, Greg.

Proceedings 2012 XXth International Conference on Electrical Machines. ed. / GA Capolini; C Henaux; A Boglietti; B Nogared. ISBN 2 - 978-1-4673-0143-5. ed. Red Hook, New York USA : IEEE, Institute of Electrical and Electronics Engineers, 2012. p. 2969-2974.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper published in Proceedings

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N2 - Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque harmonics resulting from misalignment of the rotor and stator caused by assembly and manufacturing tolerances in an axial flux, fractional pitch PMSM. A simulation method utilizing superposition of a single magnet / single slot interaction has been used previously to decouple manufacturing errors such as magnet placement and stator non-uniformity. This work extends on that previously published by inducing varying degrees of assembly misalignment of the stator and rotor to determine the effect on cogging torque waveforms. Experimental data is presented indicating that increasing degrees of offset misalignment leads to increasing sideband magnitudes in the frequency spectrum. There is good agreement between the simulation method and measured data.

AB - Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque harmonics resulting from misalignment of the rotor and stator caused by assembly and manufacturing tolerances in an axial flux, fractional pitch PMSM. A simulation method utilizing superposition of a single magnet / single slot interaction has been used previously to decouple manufacturing errors such as magnet placement and stator non-uniformity. This work extends on that previously published by inducing varying degrees of assembly misalignment of the stator and rotor to determine the effect on cogging torque waveforms. Experimental data is presented indicating that increasing degrees of offset misalignment leads to increasing sideband magnitudes in the frequency spectrum. There is good agreement between the simulation method and measured data.

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Thiele M, Heins G. Identifying cogging torque harmonics affected bymisalignment in axial flux fractional pitch PMSM. In Capolini GA, Henaux C, Boglietti A, Nogared B, editors, Proceedings 2012 XXth International Conference on Electrical Machines. ISBN 2 - 978-1-4673-0143-5 ed. Red Hook, New York USA: IEEE, Institute of Electrical and Electronics Engineers. 2012. p. 2969-2974 https://doi.org/10.1109/ICElMach.2012.6350310

Access to Document

10.1109/ICElMach.2012.6350310