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Design of Cogging Torque and Torque Ripples Reduction for High Precision Controlled SPMSM  

Kim, Chang-Ki (동아대 전기공학과)
Lee, Sang-Gon (동아대 전기공학과)
Jung, Sang-Yong (동아대 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.58, no.10, 2009 , pp. 1923-1929 More about this Journal
Abstract
The design of SPMSM(surface mounted permanent magnet synchronous motor) has been performed to reduce cogging torque and torque ripples. In general, cogging torque and torque ripples are affected by the shapes of teeth width, yoke depth, magnet pole arc, etc. Particularly, the minimum design point of cogging torque and torque ripples are different so that the design of SPMSM should be done to compromise both of them for precision application. In this paper, the design of PMSM for EPS(electric power steering) system is performed to verify the validity, and the design characteristics versus teeth width, yoke depth, and magnet pole arc are investigated in order to find out the minimum point of cogging torque and torque ripples. In addition, skew of PM is applied for cogging torque reduction.
Keywords
PMSM; Cogging Torque; Torque Ripple; PM Skew; EPS;
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