A New Design Optimization Method for Permanent Magnet Synchronous Linear Motors

Juncai Song,Zhenbao Pan,Le Li,Jiwen Zhao,Fei Dong,Siliang Lu

doi:10.3390/en9120992

Juncai Song, Zhenbao Pan + Show 4 more

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https://doi.org/10.3390/en9120992

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Journal: Energies	Publication Date: Nov 25, 2016
Citations: 12	License type: CC BY 4.0

Affiliation: Anhui University

Abstract

This study focused on the design optimization of permanent magnet synchronous linear motors (PMSLM) that are applied in microsecond laser cutting machines. A new design optimization method was introduced to enhance PMSLM performances in terms of motor thrust, thrust ripple, and inductive electromotive force (EMF). Based on accurate 3D finite element analysis (3D-FEA), a multiple support vector machine (multi-SVM) was proposed to build a non-parametric quick calculation model by mapping the relation between multivariate structure parameters and multivariate operation performances. The gravity center neighborhood algorithm (GCNA) was also applied to search the global optimal combination of the structure parameters by locating the gravity center of the multi-SVM model. The superiority and validity of this method are verified by experiments.

Highlights

Permanent magnet synchronous linear motors (PMSLM) are widely used in high-precision microsecond laser cutting machines
Thrust is one of the most important indices of PMSLM performance that can influence the acceleration of the mover, which is similar to torque in rotatory motors
Thrust ripple is becoming the largest problem that can result in a decreased accuracy of the mover position [2]; it is the fluctuation of stable thrust that can lead to scratching on the surface of products, increase roughness, and produce dimension errors

Summary

Introduction

Permanent magnet synchronous linear motors (PMSLM) are widely used in high-precision microsecond laser cutting machines. Compared with the conventional solution-routing motors with ball screws, PMSLM has absolute predominance in terms of high acceleration, excellent accuracy, and direct drive [1]. The quantity of manufactured products is guaranteed by the remarkable operational performances of PMSLM. High acceleration and efficiency are significant to the operating quality of PMSLM. Thrust is one of the most important indices of PMSLM performance that can influence the acceleration of the mover, which is similar to torque in rotatory motors. The main influencing elements of the thrust ripple are the structure parameters, control method, and load; all of the elements are gathered together nonlinearly. Two main schemes for the suppression of the thrust ripple are the design optimization of PMSLM and advanced control strategies, with the former being the dominant method [3]

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Discussion

Conclusion