Investigation of Asymmetrical Winding Layouts for Fractional-Slot Permanent Magnet Machine
- Resource Type
- Periodical
- Authors
- Yan, D.; Zhu, Z.; Lei, H.; Yan, Y.; Shi, T.; Xia, C.
- Source
- IEEE Transactions on Industrial Electronics IEEE Trans. Ind. Electron. Industrial Electronics, IEEE Transactions on. 71(8):8416-8426 Aug, 2024
- Subject
- Power, Energy and Industry Applications
Signal Processing and Analysis
Communication, Networking and Broadcast Technologies
Layout
Windings
Belts
Stator windings
Stars
Harmonic analysis
Design methodology
Fractional-slot asymmetrical winding (ASW)
permanent magnet synchronous machine (PMSM)
unbalanced magnetic force (UMF)
winding layout
- Language
- ISSN
- 0278-0046
1557-9948
Aiming at asymmetrical winding (ASW) layouts design for fractional-slot permanent magnet synchronous machine (PMSM), this article improves the conventional star-of-slot theory and proposes an effective design method of fractional-slot ASW layouts for various slot-pole combinations. In the design process, the proposed method considers the characteristic components of air-gap field time–space harmonics and the harmonic characteristic of unbalanced magnetic force (UMF). It can be used to investigate the design principles of ASW layout with a lower UMF through extracting and analyzing force vectors produced by air-gap field time–space harmonics that mainly contribute to UMF. Finally, two 39-slot and 12-pole surface-mounted PMSMs with different winding layouts are manufactured and tested. Both finite-element analysis and experimental results confirm the effectiveness of the proposed design method for double-layer ASW structures.