Analysis of the operation principle for tubular flux-switching permanent magnet linear machine

• Xiaohui Feng ^[1] ; Changli Wang ^[2] ; Guozhen Zhang ^[1] ; Rui Nie ^[1] ; Jikai Si ^[1]
  1. [1] Zhengzhou University

     Zhengzhou University

     China

     
  2. [2] North China Institute of Science and Technology

     North China Institute of Science and Technology

     China

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 42, Nº 2, 2023, págs. 285-301
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Purpose This study aims to unveil the generation mechanism of the thrust force in a tubular flux-switching permanent magnet (PM) linear (TFSPML) machine; the operation principle of the TFSPML machine is analyzed.

    Design/methodology/approach First, the air-gap flux density harmonic characteristics excited by PMs and armature windings are investigated and summarized based on a simple magnetomotive force (MMF)-permeance model. Then, the air-gap field modulation theory is applied in analyzing the air-gap flux density harmonics that contribute to the electromagnetic force. In addition, a simple method for separating the end force of the TFSPML machine is proposed, which is a significant foundation for the comprehensive analysis of this type of machine. As a result, the operation principle of the TFSPML machine is thoroughly revealed.

    Findings The analysis shows that the average electromagnetic force is mainly contributed by the air-gap dominant harmonics, and the thrust force ripple is mainly caused by the end force.

    Originality/value In this paper, the operation principle of the TFSPML machine is analyzed from the perspective of air-gap field modulation.