Minimization of higher back-EMF harmonics in permanent magnet motor using shape design sensitivity with B-spline parameterization

Author

Lee, Joon-Ho ; Kim, Dong-Hun ; Park, Il-Han

Author_Institution

Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

Volume

39

Issue

3

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1269

Lastpage

1272

Abstract

This paper presents a shape optimal design method for reducing the higher back-EMF harmonics generated in the permanent magnet motors, in which torque ripples could occur. The continuum shape design sensitivity formula and the finite element method are employed to calculate the sensitivity of flux-linkage to the design variables, which determine the shape of iron pole piece. The design variables are optimized with a B-Spline parameterization in order to provide the back-EMF waveform as close as possible to a sinusoidal form. The design algorithm is applied to a three-phase interior permanent magnet motor that contains a mount of higher back-EMF harmonics.

Keywords

AC motors; finite element analysis; harmonics; permanent magnet motors; splines (mathematics); torque; B-spline parameterization; back-EMF waveform; continuum shape design sensitivity formula; design variables; finite element method; flux-linkage; higher back-EMF harmonics; iron pole piece; shape design sensitivity; sinusoidal form; three-phase interior permanent magnet motor; torque ripples; AC motors; Design methodology; Design optimization; Equations; Finite element methods; Manufacturing; Permanent magnet motors; Sensitivity analysis; Shape control; Spline;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.810162

Filename

1198451