Transforming conventional magnet assembly to Halbach array: A double-sided linear motor case

Article type: Research Article

Authors: Ustun, Ozgur^a; | Kara, Duygu Bayram^a

Affiliations: [a] Electrical Engineering Department, Istanbul Technical University, Istanbul, Turkey

Correspondence: [*] Corresponding author: Ozgur Ustun, Electrical Engineering Department, Istanbul Technical University, Maslak, Istanbul 34469, Turkey. Tel.: +902122856742; Fax: +902122856700; E-mail: oustun@itu.edu.tr

Abstract: In this paper, an electromagnetic analysis study of a double-sided linear permanent magnet (PM) motor topology is conducted both for conventional and Halbach array magnet assemblies. Halbach arrays can condense flux lines on the one side of magnet assembly and cancel them on the reverse side, so they enable light motor structures due to the lack of back iron material. By means of the analyses, the critical performance criteria of linear motor are investigated. The designs are verified experimentally. The induced voltages and force production of prototype motors are captured to validate the design study. The findings show that Halbach array magnet assembly type linear motor has superiority for force production and lightness of design.

Keywords: Linear coreless motor, double-sided linear motor, PM motor, Halbach array

DOI: 10.3233/JAE-171035

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 2, pp. 541-547, 2019