New cogging-torque reduction method for brushless permanent-magnet motors

descriptionPublicationkeyboard_double_arrow_right Article 01 Nov 2003 English Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Transactions on Magnetics, volume 39, pages 3,503-3,506 (issn: 0018-9464,

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Authors: null Chang Seop Koh; null Jin-Soo Seol;

doi: 10.1109/tmag.2003.819473

New cogging-torque reduction method for brushless permanent-magnet motors

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Abstract

We present a new design method for reducing cogging torque in brushless permanent-magnet (PM) motors. In our method, the auxiliary slots are put on the pole face of the magnetizing yoke, which results in a not fully magnetized zone (NFMZ) at the PM. Through Fourier expansion of the field and armature functions, the position and shape of the NFMZ that eliminate the cogging torque are found. In an example, we discuss the effectiveness and applicability of the new method.

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Chungbuk National University
Korea (Republic of)

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