Analysis and experimental validation of an HTS linear synchronous propulsion prototype with HTS magnetic suspension

A high temperature superconducting (HTS) linear propulsion system composed of a single-sided HTS linear synchronous motor (HTSLSM) in its middle and HTS magnetic suspension sub-systems on both sides has been developed. The HTSLSM uses an HTS bulk magnet array on the moving secondary, and the field-trapped characteristics of the HTS bulk using different magnetized methods have been measured and compared to identify their magnetization capability. In order to generate a large levitation force for the system, three different types of permanent magnet guideways (PMGs) have been numerically analyzed and experimentally verified to obtain an optimal PMG. Based on comprehensive experimental prototype tests, the results show that the HTS linear propulsion system can run with stable magnetic suspension having a constant air-gap length, and the thrust characteristics versus the exciting current, working frequency and the air-gap length have also been obtained. This work forms the basis for developing a practical HTS linear propulsion system by using HTS bulks both for propulsion and suspension.

► An HTS linear synchronous propulsion prototype with an HTSLSM drive is developed.
► The feasibility of combining an HTSLSM with an HTS magnetic suspension system has been verified.
► Three different PMGs are studied by ECS method and experiment verification to obtain an optimal one.
► The prototype has been tested to obtain the performance and thrust characteristics of the HTSLSM.
► The measurement results benefit the optimal design and control scheme development for an HTSLSM.