Affiliations: [a] College of Aeronautics, Kunming University of Science and Technology, Kunming, Yunnan, China | [b] Department of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China
Correspondence:
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Corresponding author: Junbing Qian, College of Aeronautics, Kunming University of Science and Technology. No. 727 South Jingming Road, Chenggong District, Kunming, Yunnan, China. E-mail: qianjunbing0395@kmust.edu.cn
Abstract: A permanent magnet synchronous linear motor (PMSLM) is a linear drive mechanism that converts electric energy into mechanical energy. PMLSMs have been deployed widely in modern precision industrial manufacturing. In this study, an air-gap magnetic field model of a rectangular permanent magnet array in a PMSLM is developed based on the Biol-Savart theorem and the molecular circulation model. Furthermore, an analytical expression for the magnetic field distribution of the air-gap space is derived. Ansoft and experimental measurement are used to model the PMSLM and calculate the magnetic induction intensity and validate the analytical model. The relation between the air-gap magnetic field of a PMSLM and the geometrical dimension of the permanent magnet is analyzed.
Keywords: Permanent magnet synchronous linear motor, permanent magnet, magnetic field analysis, air gap, magnetic induction intensity
