Optimal design of the PMSM retaining plate with 3-D barrier structure and eddy-current loss-reduction effect

Hyun Woo Jun, Jong Wook Lee, Gil Ho Yoon, Ju Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

From the constant-speed variable-output motor driving test result of an interior permanent-magnet synchronous motor for a pump drive, we observed that there was an additional loss factor, which was not previously considered. Furthermore, a 3-D finite-element method analysis was performed to investigate the cause of the additional electromagnetic loss. Accordingly, it was confirmed that there was an additional eddy-current loss in the rotor retaining plate structure for the rotor assembly. Using the shape of the eddy-current path in the plate, it was determined that the eddy current was formed inside the plate itself by the bypassing magnetic flux from the permanent magnet and the slot harmonics. It was confirmed that the eddy-current path can be changed according to the structure of the plate, and the optimal retaining plate design that satisfies the design constraints was derived via the topology optimization method. Finally, the retaining plate design with the 3-D barrier structure was derived by arranging the void shape considering the total eddy-current path. Using the actual model test results, it was verified that the new retaining plate design was effective for loss reduction compared to the conventional structure.

Original languageEnglish
Article number2736501
Pages (from-to)1808-1818
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume65
Issue number2
DOIs
StatePublished - 2017 Aug 5

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Eddy currents
Permanent magnets
Rotors
Shape optimization
Synchronous motors
Magnetic flux
Optimal design
Pumps
Finite element method

Keywords

  • 3-D barrier structure
  • Eddy currents
  • High efficiency
  • Magnetic flux
  • Permanent-magnet motors
  • Slot harmonics
  • Topology optimization

Cite this

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title = "Optimal design of the PMSM retaining plate with 3-D barrier structure and eddy-current loss-reduction effect",
abstract = "From the constant-speed variable-output motor driving test result of an interior permanent-magnet synchronous motor for a pump drive, we observed that there was an additional loss factor, which was not previously considered. Furthermore, a 3-D finite-element method analysis was performed to investigate the cause of the additional electromagnetic loss. Accordingly, it was confirmed that there was an additional eddy-current loss in the rotor retaining plate structure for the rotor assembly. Using the shape of the eddy-current path in the plate, it was determined that the eddy current was formed inside the plate itself by the bypassing magnetic flux from the permanent magnet and the slot harmonics. It was confirmed that the eddy-current path can be changed according to the structure of the plate, and the optimal retaining plate design that satisfies the design constraints was derived via the topology optimization method. Finally, the retaining plate design with the 3-D barrier structure was derived by arranging the void shape considering the total eddy-current path. Using the actual model test results, it was verified that the new retaining plate design was effective for loss reduction compared to the conventional structure.",
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Optimal design of the PMSM retaining plate with 3-D barrier structure and eddy-current loss-reduction effect. / Jun, Hyun Woo; Lee, Jong Wook; Yoon, Gil Ho; Lee, Ju.

In: IEEE Transactions on Industrial Electronics, Vol. 65, No. 2, 2736501, 05.08.2017, p. 1808-1818.

Research output: Contribution to journalArticle

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