Superconducting joint attenuation compensation device
A technology of superconducting joints and attenuation compensation, which is applied to superconducting magnets/coils, magnetic objects, electrical components, etc., and can solve the problem of low resistance of superconducting joints
Active Publication Date: 2021-04-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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[0003] In the prior art, the attenuation rate required by the superconducting maglev system can be achieved by reducing the resistance of the superconducting joint, but the resistance of the superconducting joint needs to reach 10 -16 Ω level, according to the existing methods of making superconducting joints, it is difficult to make the resistance of superconducting joints reach such a low level
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] The closed-loop current in the superconducting suspension upper coil and the superconducting suspension lower coil varies with time as follows: Wherein τ=L / R, L is the inductance of the superconducting magnetic levitation closed loop loop, R is the superconducting joint resistance of the superconducting magnetic levitation closed loop loop. Then at time t after the closed-loop current stabilizes 1 The current is time t 2 The current is According ...
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The invention relates to a superconducting joint attenuation compensation device. The device comprises a superconducting ball, a superconducting magnetic levitation upper coil, a superconducting magnetic levitation lower coil, a first inductor and a second inductor, wherein the superconducting ball, the superconducting magnetic levitation upper coil and the superconducting magnetic levitation lower coil are coaxially arranged in sequence from top to bottom; one end of the superconducting magnetic levitation upper coil is connected with one end of the first inductor, and the other end of the superconducting magnetic levitation upper coil and the other end of the first coil form a superconducting joint; one end of the superconducting magnetic levitation lower coil is connected with one end of the second inductor, and the other end of the superconducting magnetic levitation lower coil and the other end of the second inductor form a superconducting joint. The device is advantaged in that inductors are connected in series to enter a closed loop of the superconducting joint, main magnetic field distribution is not affected, the compensation effect on current attenuation caused by resistance of the superconducting joint is achieved, and a superconducting magnetic levitation system can stably operate for a long time.
Description
technical field [0001] The invention relates to the technical field of superconducting magnetic levitation, in particular to a superconducting joint attenuation compensation device. Background technique [0002] The superconducting maglev system requires long-term stable closed-loop use. The principle is as follows: the closed-loop current of a certain size in the superconducting suspension upper coil and the superconducting suspension lower coil, the closed-loop current in the superconducting suspension upper coil is smaller than the closed-loop current in the superconducting suspension lower coil and there is a certain proportional relationship, thus forming A gradient magnetic field. According to the Meissner effect, in order to resist the entry of magnetic flux, the superconducting Nb sphere interacts with the magnetic field generated by the superconducting levitation upper coil and the superconducting levitation lower coil to generate a levitation force, thereby making...
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IPC IPC(8): H01F6/06H01F6/00
CPCH01F6/065H01F6/00
Inventor 黄兴胡新宁王秋良崔春艳王浩牛飞飞张子立张源
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI