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In the high-temperature superconducting (HTS) pinning Maglev system, self-stable levitation without energy consumption is achieved by the interaction between high-temperature superconductor bulks and the permanent magnetic guideway (PMG). The PMG is mainly composed of NdFeB permanent magnets, which can be easily corroded in harsh environments. A protective metal enclosure for PMG is introduced into the HTS pinning Maglev system to provide the PMG with a protection method of better corrosion resistance. The introduction of aluminum alloy protection plates in the system will inevitably increase the complexity of the electromagnetic relationship of the system, bringing additional electromagnetic force excitation and affecting the operation quality as well as the safety of the HTS pinning Maglev vehicle. The dynamic response of the system is studied through experiments and simulations. First, the dynamic levitation, guidance, and drag forces of the system during the operation are measured using a self-developed HTS Maglev dynamic measurement system (SCML-03) and compared with the original HTS pinning Maglev system without aluminum plates. Then, a finite-element analysis using an equivalent method is conducted based on the measured flux changes to study the system's electromagnetic forces’ characteristics under high-speed operation. Finally, the electromagnetic force excitation is put into a dynamic model of an HTS pinning Maglev vehicle, and the responses are analyzed.

High-temperature superconducting (HTS) pinning maglev has attracted attention due to its advantages of stable levitation without external energy, and integration of levitation and guidance. As one of the main excitation sources of the HTS pinning maglev system, permanent magnet guideway (PMG) irregularity is affected by the geometric and magnetism of PMG together. Therefore, the measurement method only for geometry in wheel-rail systems no longer meets the measurement requirements of PMG irregularity. In addition, the current research on HTS pinning maglev trains is mainly based on the test line, which has certain requirements for repeated measurement and measurement convenience. In this article, various sensors are set on a single Dewar HTS pinning maglev system. PMG magnetic induction intensity signal, the vibration response signal, and the geometric signal are measured, respectively. The equidistant track marker on the PMG surface is used as a keyphasor pulse signal to realize the spatial resample method. After converting the time-domain signal to the spatial domain, the PMG local irregularity evaluation is carried out. Based on the seven-parameter fitting model, the PMG irregularity spectrum is fit. Taking the Chinese mainline railway track spectrum as the contrast, it can be concluded that the mid-wave irregularity of the HTS pinning maglev system is higher. The research content of this article provides a theoretical basis for the selection of measurement methods under different measurement requirements and conditions. The obtained irregularity power spectrum can provide a reference for the dynamic simulation of HTS pinning maglev.