Reduction of the torque ripple in permanent magnet actuators by a multi-objective minimization technique

Author

Borghi, C.A. ; Casadei, D. ; Fabbri, M. ; Serra, G.

Author_Institution

Dipt. di Ingegneria Elettrica, Bologna Univ., Italy

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

2869

Lastpage

2872

Abstract

In this paper a minimization technique is used to reduce the torque ripple of permanent magnet actuators. In order to do this a global stochastic (1+1) evolution strategy algorithm coupled to a filled function acceleration technique is utilized. The cost function is defined as a combination of the e.m.f. harmonics induced in the stator windings and the harmonic components of the magnet permeance. The relative importance of the different contributions are taken into account by penalty coefficients. The method described is used for a 3-phase, 6-pole Permanent Magnets (PM) synchronous motor

Keywords

actuators; harmonics; machine theory; minimisation; permanent magnet motors; stators; synchronous motors; torque; EMF harmonic; cost function; filled function acceleration; global stochastic evolution strategy algorithm; multi-objective minimization; penalty coefficient; permanent magnet actuator; permeance; stator winding; synchronous motor; torque ripple; Actuators; Design optimization; Forging; Magnetic flux; Magnetic separation; Minimization; Permanent magnets; Stator windings; Synchronous machines; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717668

Filename

717668