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http://dx.doi.org/10.5370/KIEE.2018.67.2.199

Cogging Torque Analysis According to Unevenly Magnetized Magnets in PM Motor  

Lee, Dong-ho (Dept. of Electrical Engineering, Incheon National University)
Jeong, Chae-lim (Dept. of Electrical Engineering, Incheon National University)
Lee, Seung-Tae (Dept. of Electrical Engineering, Incheon National University)
Hur, Jin (Dept. of Electrical Engineering, Incheon National University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.67, no.2, 2018 , pp. 199-208 More about this Journal
Abstract
This paper investigated the effect of unevenly magnetized magnets to the cogging torque. First, through qualitative analysis of cogging torque, the generation of slot harmonic component is explained. Second, it is found that the slot harmonic can be suppressed by locating the magnets under specific condition even if the magnets are irregularly magnetized respect to each other. Finally, it is verified with the experimental result.
Keywords
Cogging torque; Permanent magnet machine; Torque ripple; Uneven magnets;
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