Design and Analysis of Parallel Hybrid-Excited Superconducting Linear Motor for High-Speed Electromagnetic Suspension Maglev

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Abstract
High-speed maglev with electromagnetic suspension (EMS) system has become the most promising rail transportation system benefitting from its zero friction, high speed and low noise characteristics. However, the existing EMS maglev usually has small air gap (less than 10 mm) and consumes high excitation power. In order to enlarge the air gap and reduce the excitation power, this paper proposes a parallel hybrid-excited superconducting linear motor (PHESLM) for EMS maglev. Some of the normal-conducting electromagnets are replaced by superconducting electromagnets in parallel form. Besides, feasible configuration is set for superconducting electromagnets to overcome the unbalance between three phases. Based on the existing TR08 EMS maglev, the proposed PHESLM is built and analyzed with finite element analysis (FEA). With improved exciting field provided by superconducting electromagnets, the proposed PHESLM can reduce more than 40% excitation power at 20 mm air gap, while the unbalance between three phases is negligible.
Funding Information
  • National Natural Science Foundation of China
  • China Postdoctoral Science Foundation

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