Electromagnetic Investigation of a High-Temperature Superconducting Linear Synchronous Motor for High-Speed Railway

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Abstract
High Temperature Superconducting (HTS) Linear Synchronous Motor (LSM) with low power loss, high thrust density and large mechanical gap, makes it a promising candidate for driving the future high-speed rail transit and even ultra high-speed magnetic levitation (Maglev) vehicle. However superconducting magnet can produce strong enough magnetic field, which will inevitably lead to the saturation of stator iron and generate significantly attractive force between the stator and the on-board HTS magnet. Therefore, a coreless-typed HTS LSM has attracted much attention in recent years. This paper, served as a fundamental study on a linearly driven system for rail transit or Maglev, is aimed to investigate the electromagnetic properties of an HTS LSM, by means of numerical modeling, experiment and analytic model. Firstly, a two-dimensional finite element model was estab-lished. Then, a force-measuring system, being able to measure the three-dimensional forces of motor, was fabricated. Lastly, a set of analytic expressions to describe the magnetic field distribution of coreless-typed LSM, were derived, which was verified by compar-ing with a finite element model and ultimately tailored to study the electromagnetic properties of the coreless-typed HTS LSM.
Funding Information
  • National Natural Science Foundation of China (51475389, 51722706)
  • Fundamental Research Funds for the Central Universities (2682016ZY05)
  • Sichuan Provincial Youth Science and Technology Foundation (2016JQ0003)
  • State Key Laboratory of Traction Power (2015TPL_T05)

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