Structural Optimization of Double-Secondary PMSLM Based on Spatial Harmonic Suppression

Abstract:

In view of that detent force (DF) spatial harmonic has great influence on thrust ripple of permanent magnet synchronous linear motor (PMSLM), a harmonic suppression method is proposed. DF of the PMSLM model is calculated by finite element method (FEM) and its harmonic spectrum is achieved by Fourier transform (FT). Also total harmonic distortion (THD) is introduced to quantificat spatial harmonic. The effects of air gap, permanent magnet (PM) size, primary size, secondary size and pole-arc coefficient upon DF are analyzed. In order to minimize THD, orthogonal optimization design is adopted to optimize PMSLM structural parameters. A double-secondary PMSLM is chosen as the subject of research in the paper. Based on quantitative calculation, orthogonal experiment and range analysis are used to obtain optimal structures. This paper provides an effective quantitative analysis method for PMSLM spatial harmonic suppression.

• Periodical: Applied Mechanics and Materials (Volumes 416-417)
• Pages: 1251-1256
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.416-417.1251
• Online since: September 2013
• Authors: Pan Pan Chen, Ji Wen Zhao
• Keywords: Double-Secondary PMSLM, Spatial Harmonic Suppression, Structural Optimization, THD

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