Analysis and Design of Double-Sided Air Core Linear Servo Motor With Trapezoidal Permanent Magnets

Author

Yuqiu Zhang ; Zilong Yang ; Minghu Yu ; Kaiyuan Lu ; Yunyue Ye ; Xiao Liu

Author_Institution

Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China

Volume

47

Issue

10

fYear

2011

Firstpage

3236

Lastpage

3239

Abstract

In order to reduce the thrust ripple of linear servo system, a double-sided air core permanent magnet linear servo motor with trapezoidal shape permanent magnets (TDAPMLSM) is proposed in this paper. An analytical model of the motor for predicting the magnetic field in the air-gap at no-load is introduced. This model is derived based on the equivalent magnetization intensity method, and its accuracy is validated by using the results obtained from the finite-element method. The key dimensions that affect the air-gap magnetic field are analyzed based on the analytical model, and the design is optimized by using genetic algorithm. A thrust ripple reduction of 70.6% is achieved by optimization. The proposed analytical model may be used for a quick and reliable design and design optimization of the TDAPMLSM.

Keywords

finite element analysis; genetic algorithms; linear motors; magnetisation; permanent magnet motors; servomotors; air core permanent magnet linear servo motor; air-gap magnetic field; double-sided permanent magnet linear servo motor; equivalent magnetization intensity method; finite-element method; genetic algorithm; optimization; trapezoidal shape permanent magnets; Air gaps; Analytical models; Atmospheric modeling; Permanent magnet motors; Permanent magnets; Shape; Windings; Analytical modeling; finite-element method (FEM); optimization; permanent magnet linear servo motor (PMLSM);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2156398

Filename

6028059