For the high temperature superconducting (HTS) magnetic levitation (Maglev) test vehicle
in china, the present NdFeB PMG has the symmetrical magnetic field distribution on the upper and
lower surface. However, the vehicle only utilizes its upper magnetic field. 50% PMG magnetic field
energy goes to waste, so the onboard HTSC arrays haven’t reached the best levitation performance. In
order to make the HTS/PMG maglev system more efficient and reasonable, a new HTS/PMG Maglev
design has been proposed based on the present PMG and the Halbach array PMG, whose PMG is
called as hybrid PMG. Firstly, three magnetic field distributions of three kinds of PMG are compared
using FEM. It is found that the magnetic field distribution of the hybrid PMG is more efficient for the
HTSC’s maglev. The concentrating upper surface magnetic field is stronger to improve the load
capability of the system. Numerical analysis and experiment are close for the present HTS/PMG
system. More calculation shows that the bulk YBaCuO HTSC with the hybrid PMG has significantly
better levitation performance than that with the other two PMGs. The usage of the onboard HTSC
arrays is improved much and the load capability of the HTS/PMG Maglev vehicle is upgraded with
the hybrid PMG.
On the requirement of high temperature superconducting (HTS) Maglev transportation
application, levitation capability of bulk YBa2Cu3O7-x on the HTS Maglev test vehicle has been
investigated experimentally by pulsed field magnetization (PFM) and field cooling (FC). The result
showed that YBa2Cu3O7-x sample magnetized by the pulsed magnetic field behaves like a magnet in
the other external field, and the magnetization direction of bulk determines its levitation force and
lateral force mode (magnitude and direction) over NdFeB permanent magnetic guideway (PMG). On
the other hand, static field cooling condition is with an electromagnetic field realized by Field Control
Electromagnets Workbench. Two important forces of the same bulk were measured and compared
with the PMG when the bulk had the same max trapped field by FC and PFM methods, and the results
show the difference effects by these two magnetization methods.
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