NDLI: Thrust Ripple Reduction in Ultrahigh-Acceleration Moving-Permanent-Magnet Linear Synchronous Motor

Content Provider	IEEE Xplore Digital Library
Author	Sato, K.
Copyright Year	1965
Abstract	This paper describes thrust ripple reduction in an ultrahigh-acceleration moving-permanent-magnet linear synchronous motor (MPM LSM). The pole pitch of the permanent magnet (PM) is adjusted to reduce thrust ripple because this technique is effective and is easily applicable for many design procedures of PM LSMs. However, in addition to reducing the thrust ripple, this adjustment affects parameters such as the number of driving phases, the average thrust, the mover mass, and the working range. These parameters influence the performance and the usability of linear motors. In this study, the PM pole pitch of an MPM LSM is adjusted. The MPM LSM produces an average thrust of 4030 N, but the ratio of the peak-to-peak thrust ripple to the average thrust exceeds 80%. The influences on the properties of the MPM LSM are numerically investigated and discussed. The PM pole pitch of the MPM LSM is determined based on the numerical analysis and an improved mover whose pitch was numerically determined is fabricated. The improved mover has a light frame and 18 PMs for realizing a high thrust-to-mover mass ratio (thrust per mover mass). The experimental results demonstrate that the improved MPM LSM can generate 4.56 × 10³ N with a peak-to-peak thrust ripple of 7.04%.
Sponsorship	IEEE Magnetics Society
Starting Page	4866
Ending Page	4873
Page Count	8
File Size	1419784
File Format	PDF
ISSN	00189464
Volume Number	48
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Magnetic cores Saturation magnetization Force Magnetic flux density Couplings thrust-to-mover mass ratio Linear synchronous motor (LSM) permanent magnet (PM) thrust thrust ripple
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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