期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 44, 期 7, 页码 1785-1790出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2008.918921
关键词
cogging force; detent force; permanent-magnet linear motor; thrust force
资金
- Korea Institute of Industrial Technology(KITECH) [2007-P-EP-HM-E-07-0000, R-2006-NR-074] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6B1621] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The cogging force of a permanent-magnet linear motor (PMLM) is a major component of the detent force, but unfortunately makes a ripple in the thrust force and induces undesired vibration and acoustic noise. It also deteriorates the control characteristics, particularly in regard to precise speed and position control. In this paper, we propose a new PMLM having a 9-pole 10-slot structure in order to reduce the cogging force. Our PMLM is properly wound for,three-phase driving. Through a theoretical and finite-element analysis, we show that the 9-pole 10-slot PMLM removes almost all of the cogging force while giving 10% and 23% larger back-electromotive force and thrust force, respectively, than a conventional 8-pole 12-slot PMLM under the same conditions of exciting current, total number of windings, and total PM volume.
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