Structure of a hybrid superconducting magnet and magnetic suspension bearing with it

Abstract

A structure of a hybrid superconducting magnet and a magnetic levitation bearing with it. Multiple single-cake or double-cake superconducting magnets are stacked and connected in parallel or in series to form a superconducting magnet. Stacked superconducting blocks are placed inside the superconducting magnet. Stacked superconducting A superconducting shielding coil is arranged on the outer surface of the block. The superconducting magnet is driven by a DC power supply or works in a closed-loop constant current mode. The magnetization methods of stacked superconducting blocks include zero-field cold magnetization, field-cooled magnetization or pulse magnetization. The magnetization field comes from a superconducting magnet or a background magnetic field. The shielding coil is wound from superconducting tape and forms a closed loop. The above-mentioned superconducting shielding coil can weaken the influence of the alternating external field on the capture magnetic field of the stacked superconducting blocks, and enhance the magnetic field stability of the hybrid superconducting magnet. The invention has the advantages of large caliber of the superconducting magnet and strong capturing magnetic field of stacked superconducting blocks, can greatly enhance the magnetic field strength of the magnet, and improve the carrying capacity of the magnetic suspension bearing.

Description

technical field [0001] The invention relates to the technical fields of superconducting magnets, magnetic levitation, etc., in particular to a structure of a hybrid superconducting magnet and a magnetic levitation bearing with the same. Background technique [0002] In systems such as superconducting maglev, superconducting motors, particle accelerators, and medical imaging, the magnetic field strength and uniformity of the working surface directly affect the application performance of the system. Generally speaking, the stronger the magnetic field on the working surface and the better the uniformity, the better the application performance of the system. However, in the case of large air gap applications, it is difficult for ordinary ferromagnets and permanent magnets to meet the magnetic field requirements of the system. [0003] Superconducting magnets can be made into large-diameter magnets, which can effectively radiate the magnetic field of the magnet to the working sur...

AI Technical Summary

Problems solved by technology

However, the main problem of this kind of hybrid suspension unit is that when the closed superconducting coil does not undergo local quenching, the closed superconducting coil will shield the external magnetic field outside the coil, and no induced current will be generated inside the superconducting block; the most unfavorable case Yes, the magnetic field generated by the superconducting coil acts on the superconducting block, and an induced current opposite to the current of the superconducting coil is generated in the block. The reverse induced current interacts with the external field to generate an attractive force, resulting in a decrease in the suspension capacity of the system

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