Analysis of PM eddy current loss in rotor-PM and stator-PM flux-switching machines by air-gap field modulation theory

P. Su, W. Hua, M. Hu, Zhe Chen, M. Cheng, W. Wang

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This paper investigates and compares the eddy current loss induced in permanent magnet (PM) in both rotor-PM flux-switching (RPM-FS) machines and stator-PM flux-switching (SPM-FS) machines. Based on the field modulation principle, the harmonic components of both the PM field and armature reaction field are deduced, as well as the corresponding frequencies. Then, the PM loss production mechanisms due to eddy current are revealed for the RPM-FS and SPM-FS machines, respectively. Consequently, the similarities and differences between two FS machines are investigated from the perspectives of both electromagnetic torque and PM eddy current loss production mechanisms. The results indicate that the PM eddy current loss in SPM-FS machines influences efficiency dramatically. However, for the RPM-FS machine, the armature reaction field affects the PM loss more sensitively. In addition, a large PM eddy current loss exhibits associated with high-power rating and large-current density FS machines for electric vehicle application, and it can be reduced by utilizing PM segmentation method.
Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
Volume67
Issue number3
Pages (from-to)1824 - 1835
Number of pages12
ISSN0278-0046
DOIs
Publication statusPublished - Mar 2020

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Eddy currents
Stators
Permanent magnets
Rotors
Modulation
Fluxes
Air
Electric vehicles
Current density
Torque

Keywords

  • Flux switching
  • Permanent magnet
  • PM eddy current loss
  • Harmonic analysis
  • Field modulation

Cite this

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title = "Analysis of PM eddy current loss in rotor-PM and stator-PM flux-switching machines by air-gap field modulation theory",
abstract = "This paper investigates and compares the eddy current loss induced in permanent magnet (PM) in both rotor-PM flux-switching (RPM-FS) machines and stator-PM flux-switching (SPM-FS) machines. Based on the field modulation principle, the harmonic components of both the PM field and armature reaction field are deduced, as well as the corresponding frequencies. Then, the PM loss production mechanisms due to eddy current are revealed for the RPM-FS and SPM-FS machines, respectively. Consequently, the similarities and differences between two FS machines are investigated from the perspectives of both electromagnetic torque and PM eddy current loss production mechanisms. The results indicate that the PM eddy current loss in SPM-FS machines influences efficiency dramatically. However, for the RPM-FS machine, the armature reaction field affects the PM loss more sensitively. In addition, a large PM eddy current loss exhibits associated with high-power rating and large-current density FS machines for electric vehicle application, and it can be reduced by utilizing PM segmentation method.",
keywords = "Harmonic analysis, Air gaps, Stator windings, Armature, Eddy currents, Rotors, Flux switching, permanent magnet, PM eddy current loss, harmonic analysis, field modulation, Flux switching, Permanent magnet, PM eddy current loss, Harmonic analysis, Field modulation",
author = "P. Su and W. Hua and M. Hu and Zhe Chen and M. Cheng and W. Wang",
year = "2020",
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doi = "10.1109/TIE.2019.2902782",
language = "English",
volume = "67",
pages = "1824 -- 1835",
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Analysis of PM eddy current loss in rotor-PM and stator-PM flux-switching machines by air-gap field modulation theory. / Su, P.; Hua, W.; Hu, M.; Chen, Zhe; Cheng, M.; Wang, W.

In: IEEE Transactions on Industrial Electronics, Vol. 67, No. 3, 03.2020, p. 1824 - 1835.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Analysis of PM eddy current loss in rotor-PM and stator-PM flux-switching machines by air-gap field modulation theory

AU - Su, P.

AU - Hua, W.

AU - Hu, M.

AU - Chen, Zhe

AU - Cheng, M.

AU - Wang, W.

PY - 2020/3

Y1 - 2020/3

N2 - This paper investigates and compares the eddy current loss induced in permanent magnet (PM) in both rotor-PM flux-switching (RPM-FS) machines and stator-PM flux-switching (SPM-FS) machines. Based on the field modulation principle, the harmonic components of both the PM field and armature reaction field are deduced, as well as the corresponding frequencies. Then, the PM loss production mechanisms due to eddy current are revealed for the RPM-FS and SPM-FS machines, respectively. Consequently, the similarities and differences between two FS machines are investigated from the perspectives of both electromagnetic torque and PM eddy current loss production mechanisms. The results indicate that the PM eddy current loss in SPM-FS machines influences efficiency dramatically. However, for the RPM-FS machine, the armature reaction field affects the PM loss more sensitively. In addition, a large PM eddy current loss exhibits associated with high-power rating and large-current density FS machines for electric vehicle application, and it can be reduced by utilizing PM segmentation method.

AB - This paper investigates and compares the eddy current loss induced in permanent magnet (PM) in both rotor-PM flux-switching (RPM-FS) machines and stator-PM flux-switching (SPM-FS) machines. Based on the field modulation principle, the harmonic components of both the PM field and armature reaction field are deduced, as well as the corresponding frequencies. Then, the PM loss production mechanisms due to eddy current are revealed for the RPM-FS and SPM-FS machines, respectively. Consequently, the similarities and differences between two FS machines are investigated from the perspectives of both electromagnetic torque and PM eddy current loss production mechanisms. The results indicate that the PM eddy current loss in SPM-FS machines influences efficiency dramatically. However, for the RPM-FS machine, the armature reaction field affects the PM loss more sensitively. In addition, a large PM eddy current loss exhibits associated with high-power rating and large-current density FS machines for electric vehicle application, and it can be reduced by utilizing PM segmentation method.

KW - Harmonic analysis

KW - Air gaps

KW - Stator windings

KW - Armature

KW - Eddy currents

KW - Rotors

KW - Flux switching

KW - permanent magnet

KW - PM eddy current loss

KW - harmonic analysis

KW - field modulation

KW - Flux switching

KW - Permanent magnet

KW - PM eddy current loss

KW - Harmonic analysis

KW - Field modulation

U2 - 10.1109/TIE.2019.2902782

DO - 10.1109/TIE.2019.2902782

M3 - Journal article

VL - 67

SP - 1824

EP - 1835

JO - I E E E Transactions on Industrial Electronics

JF - I E E E Transactions on Industrial Electronics

SN - 0278-0046

IS - 3

ER -