Design of a High-Efficiency External Rotor Interior Permanent Magnet Synchronous Motor Without Magnetic Leakage Flux Path
Kyoung-Soo Cha,
Jae-Hyun Kim,
Soo-Gyung Lee and
Min-Ro Park ()
Additional contact information
Kyoung-Soo Cha: Advanced Mobility System Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea
Jae-Hyun Kim: School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
Soo-Gyung Lee: Global R&D Center, POSCO, Incheon 21985, Republic of Korea
Min-Ro Park: Department of Electrical Engineering, Soonchunhyang University, Asan 31538, Republic of Korea
Mathematics, 2025, vol. 13, issue 11, 1-17
Abstract:
This paper proposes a high-efficiency design for an external rotor interior permanent magnet synchronous motor (IPMSM) that eliminates the magnetic leakage flux path. The conventional model based on an external rotor surface-mounted permanent magnet synchronous motor (SPMSM) is analyzed using a statistical method. Design directions are derived by comparing efficiencies at two major operating points with different motor characteristics. A V-shaped IPMSM is then proposed to increase the permanent magnet volume and reduce magnetic leakage. Design optimization is conducted using Gaussian process models (GPMs) constructed with a Latin hypercube design (LHD), and the optimal design is determined using a gradient descent algorithm. A prototype is fabricated to confirm manufacturability, and the improved efficiency of the proposed design is experimentally verified. The results demonstrate that the proposed IPMSM significantly outperforms the conventional SPMSM in terms of efficiency across both operating points.
Keywords: design optimization; efficiency; external rotor permanent magnet synchronous motor; gaussian process model; V-shaped rotor type (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:
Downloads: (external link)
https://www.mdpi.com/2227-7390/13/11/1865/pdf (application/pdf)
https://www.mdpi.com/2227-7390/13/11/1865/ (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:jmathe:v:13:y:2025:i:11:p:1865-:d:1670835
Access Statistics for this article
Mathematics is currently edited by Ms. Emma He
More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().