Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization

Jae-Woo Jung, Byeong-Hwa Lee, Kyu-Seob Kim and Sung-Il Kim
Additional contact information
Jae-Woo Jung: R&D Center, Hyundai Mobis, Yongin 16891, Korea
Byeong-Hwa Lee: Electric Power Train R&D Center, Korea Automotive Technology Institution, Daegu 43011, Korea
Kyu-Seob Kim: Electric Power Train R&D Center, Korea Automotive Technology Institution, Daegu 43011, Korea
Sung-Il Kim: Department of Electrical Engineering, Hoseo University, Asan 31499, Korea

Energies, 2020, vol. 13, issue 19, 1-15

Abstract: We designed and analyzed an interior permanent magnet synchronous motor (IPMSM) to prevent irreversible demagnetization of the permanent magnets (PMs). Irreversible demagnetization of NdFeB PMs mainly occurs due to high temperature, which should thus be minimized. Therefore, it is necessary to reduce the eddy current loss in the PM through optimal design. The shape of the rotor core was optimized using finite element analysis (FEA) and response surface methodology. Three-dimensional (3-D) FEA is required for accurate computation of the eddy current loss, but there is huge time, effort, and cost consumption. Therefore, a method is proposed for indirectly calculating the eddy current loss of PMs using 2-D FEA. A thermal equivalent circuit analysis was used to calculate the PM temperature of the optimized model. For the thermal analysis, the copper loss, core loss, and eddy current loss in PMs were estimated and applied as a heat source. Based on the results, we confirmed the stability of the optimum model in terms of the PM demagnetization.

Keywords: eddy current loss; permanent magnet; FEA; IPMSM; irreversible demagnetization; thermal equivalent circuit analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/19/5082/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/19/5082/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:19:p:5082-:d:421307

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().