Magnet array of planar motor using permanent magnets with different magnetisation intensity and height. Issue 14 (19th February 2021)

• Record Type: Journal Article
• Authors: Wang, Yang; Chen, Fuxiang; Zheng, Zhiyi; Zeng, Lizhan
• Is Part Of: IET electric power applications. Volume 14:Issue 14(2020)
• Page Start: 2772
• Page End: 2779
• Publication Date: 2021-02-19
• Subjects: Fourier analysis -- magnetic fields -- permanent magnet motors -- magnetic flux -- machine theory -- actuators; scalar magnetic potential equation -- magnetic field model -- permanent magnets -- magnetisation intensity -- planar motor -- easy‐to‐manufacture magnet array -- magnetisation height -- multidegree long stroke -- structural complexity -- flux density distribution -- Fourier analysis; Electric power -- Periodicals; Electric power systems -- Periodicals; 621.305
• DOI: 10.1049/iet-epa.2020.0636
• Languages: English
• ISSNs: 1751-8660

Abstract

Abstract : Planar motor is used as an actuator to directly produce multi‐degree long stroke, high speed, and high precision movement. Its performance mainly depends on the topology and design of magnet array. In response to the rising trend of structural complexity, this study presents a novel easy‐to‐manufacture magnet array using permanent magnets with different magnetisation intensity and height. First, the flux density distribution of magnet array with different magnetisation intensity is derived by the Fourier analysis and the scalar magnetic potential equation. Then, the magnetic field model of magnet array using permanent magnets with different magnetisation intensity and height is obtained by the superposition method. Afterwards, the magnet array is raised and optimised based on the derived model. Calculations show that the high‐order harmonics are significantly reduced. At last, the proposed analytical modelling method and magnet array are verified with experiments.