968results about "Superconductor elements usage" patented technology

The invention discloses a superconducting magnet quench detection early warning system and method based on skeleton current, and relates to the field of superconducting magnet quench detection, and the method comprises the steps: constructing an electrothermal coupling finite element model of a superconducting magnet and a conductive skeleton; simulating different quench events based on the electrothermal coupling finite element model; according to different quench events, quench judgment threshold values and different levels of quench severity index grading threshold values are determined; when the superconducting magnet is out of service, acquiring a skeleton current signal that the current of the superconducting magnet is shunted to the conductive skeleton; based on the skeleton current signal, according to the quench judgment threshold value and the quench severity index grading threshold value, grading early warning and protection response are conducted on the superconducting magnet quench, nondestructive testing can be conducted on the superconducting magnet quench, grading evaluation and optimization protection of the quench severity degree are achieved, and the safety of the superconducting magnet quench is improved. And the cost of the quench monitoring system is reduced.

The invention belongs to the technical field of superconducting wires, and relates to a niobium-tin composite superconducting wire and a preparation method thereof. The invention provides a Nb3Sn composite superconducting wire. The Nb3Sn composite superconducting wire sequentially comprises an Nb3Sn superconducting wire core, a barrier layer, a stable layer, a transition layer, a substrate layer and a functional layer from inside to outside, the transition layer is formed by mixing copper and a dielectric polymer, and the copper content is continuously decreased in a gradient manner from inside to outside; the substrate layer is the dielectric polymer; the functional layer is a plurality of protruding metal microstructures. According to the invention, the functional layer with the broadband electromagnetic stealth function is integrated on the basis of the Nb3Sn superconducting wire rod, so that the radar cross section is obviously reduced while the Nb3Sn superconducting wire rod bears high-density superconducting current and generates a strong magnetic field, and the technical problem that a high-field superconducting magnet system is easy to detect in an electromagnetic environment is solved.

The invention belongs to the technical field of cable processing, and relates to a preparation method and application of a flexible superconducting coaxial cable outer conductor. The preparation method comprises the following steps: mixing Nb powder and Ti powder by adopting a vibrating ball mill to prepare NbTi composite powder; a substrate of laser powder bed melting equipment is preheated, the NbTi composite powder is spread on the substrate of the laser powder bed melting equipment, a melting powder layer is scanned through the laser powder bed melting technology, a three-dimensional communicated grid structure is formed through interlayer staggered scanning, finally, the NbTi net-shaped alloy pipe is placed in a strong acid solution to be soaked for a short time, redundant metal powder is removed, and the NbTi net-shaped alloy pipe is obtained. And finally, the preparation of the flexible superconducting coaxial cable outer conductor for the quantum computer is realized.

The invention relates to the technical field of electric wires and cables, and discloses an ultrahigh-conductivity electric wire and cable and a preparation method thereof. A graphene enhancement layer; a nano composite insulating material layer; an inner semi-conductive layer; a conductive copper strip shielding layer; a silver-plated copper wire woven mesh shielding layer; an intelligent monitoring and protection sheath; the method comprises the following steps: step S01, preparing a superconducting core wire strand; step S02, preparing a nano composite insulating material layer; s03, preparing a shielding layer; step S04, intelligent monitoring and protection sheath preparation; the superconducting core wire strand formed by twisting a plurality of YBCO superconducting material filaments forms a stable structure with excellent conductivity under the precise control of twisting process parameters, so that the resistance is effectively reduced, the loss in the electric energy transmission process is reduced, the electric energy transmission efficiency is improved, high-density current can be borne for stable transmission, and the service life of the cable is prolonged. And the requirement of the modern electrical engineering field on high conductivity of wires and cables is met.

The invention provides a method for preparing an iron-based superconducting material single crystal in a microgravity environment, and belongs to the field of superconducting materials. The method specifically comprises the following steps: carrying out a microgravity crystal growth experiment in a high-temperature experiment cabinet of a space station, putting a solid-phase sintered or pre-melted rod-like raw material into a furnace body, heating and melting, then slowly solidifying, and finally growing the iron-based superconducting material single crystal with large size and extremely low defect density.

The invention discloses a superconducting magnet coil quenching detection method and a related device, and relates to the technical field of superconducting magnets, and the method comprises the steps: collecting the total voltage of two ends of a superconducting magnet coil and the current of any end of the superconducting magnet coil in real time in the operation process of a superconducting magnet; based on a relation curve that the inductance of the superconducting magnet coil changes along with the current, the resistive voltage in the superconducting magnet coil is determined through the total voltage at the two ends of the superconducting magnet coil and the current at any end of the superconducting magnet coil; when it is detected that the resistive voltage is increased to a voltage threshold value or the continuous increasing duration of the resistive voltage exceeds a duration threshold value, it is judged that the superconducting magnet coil is quenched; through the method, the problems that an existing superconducting magnet quenching detection method is complex and low in detection sensitivity are solved.

The invention discloses a copper plating method for a superconducting strip. The method comprises the following steps: S1, carrying out initial electrochemical copper plating on a processed strip; s2, high-precision continuous thickness measuring equipment is adopted to test the thickness of the plating layer in the length direction and the width direction of the strip; s3, compensating the thickness error by adjusting the position of the shielding plate according to the thickness distribution data obtained by testing; and S4, the steps S2-S3 are repeated until the plating layer is accumulated to reach the target thickness. The thicknesses of the copper plating layers on the two sides of the superconducting tape are adjusted by adjusting the shielding plates, non-contact detection and dynamic adjustment of the thickness of the plating layer are achieved, and the precision of the thickness of the plating layer is improved.

The invention discloses a superconducting fault current limiter and net rack cooperative suppression method for short-circuit current of a receiving-end power grid. Comprising the following steps: firstly, quantifying and constructing a short-circuit current constraint model considering superconducting fault current limiter configuration and grid structure optimization; secondly, a collaborative planning model of superconducting fault current limiter configuration and grid structure optimization is established for solving the problem that short-circuit current exceeds the standard in new energy large-scale access, traditional power supply superposition and receiving end power grid coordinated development, the main problem is responsible for long-term planning decision, the target is to minimize the total investment cost, and the main problem is responsible for long-term planning decision making. The sub-problem is responsible for checking system safe operation constraints, and the target is to minimize the operation cost. And finally, solving the model by adopting an ADMM-based short-circuit current suppression model, and effectively suppressing the short-circuit current of the receiving-end power grid through loop iteration to minimize a relaxation error. The method provides technical support for solving the problem that the short-circuit current of the receiving-end power grid exceeds the standard, and is suitable for short-circuit current control of large-scale access of new energy to the receiving-end power grid.

This invention provides a method for detecting quench in a superconducting coil using leakage current, comprising the following steps: Step 1: Determine a first detection connection point on the main superconducting tape adjacent to a first current connection point, wherein the first detection connection point and the first current connection point are equipotential points; Step 2: Determine a second detection connection point on the sampling superconducting tape, wherein the second detection connection point and the second current connection point are equipotential points; Step 3: Connect a leakage current sampling circuit to the first and second detection connection points. If the leakage current sampling circuit detects leakage current, it is determined that quench exists in the main superconducting tape. This invention uses a leakage current sampling circuit to solve the problem of difficulty in sampling the quench voltage of superconducting magnets.

The invention provides a structure optimization method of a protection structure of a superconducting cable, the protection structure of the superconducting cable and a superconducting coil, and the structure optimization method comprises the steps: building a finite element simulation model of the protection structure, and determining a parameter range of design variables, sampling to obtain a plurality of first sample data sets including coil box thickness data and protective layer thickness data, and performing coupling analysis on the finite element simulation model to obtain a first stress result corresponding to each first sample data set, and constructing a response surface model based on the plurality of first sample data sets and the first stress result corresponding to each first sample data set, and defining an optimization equation and performing structure optimization on the protection structure by taking the sum of maximized stress margins as an optimization target in a constraint condition range so as to obtain a final protection structure optimization scheme. The optimization method provided by the invention has high optimization efficiency and can cover the global situation, so that the optimization result precision is improved.

The present invention relates to the technical field of superconducting materials. Disclosed are a MgB2 superconducting wire and a preparation method therefor. The preparation method comprises: melting Mg, Cu and Ti to obtain a Mg alloy ingot, processing the Mg alloy ingot to obtain a Mg alloy rod, loading the Mg alloy rod and B powder into a Nb tube to obtain a composite rod, processing the composite rod to obtain a single-core wire, loading the single-core wire into an oxygen-free copper tube, then loading into a monel tube in a densely-packed manner, and performing cold-forming treatment to obtain a multi-core composite wire; and performing high-temperature phase-forming heat treatment on the multi-core composite wire to prepare the MgB2 superconducting wire. In the present application, the Mg alloy rod containing Cu and Ti metal elements is used as a Mg source for preparing a MgB2 multi-core wire, so as to improve the plastic deformation ability of the Mg alloy rod in the wire treatment processes, and improve the grain boundary coupling, thereby improving the current carrying performance of the MgB2 superconducting wire.

The invention discloses a superconducting wire performance testing device which is characterized by comprising a sample rod, a conductor critical current testing framework, a conductor mechanical performance testing framework and a Dewar. During performance testing, the sample rod and the conductor critical current testing framework are detachably connected and located in the Dewar; or the sample rod and the conductor mechanical property testing framework are detachably connected and located in the Dewar. The testing device provided by the invention can be used for both critical current testing and mechanical performance testing.

The present invention discloses a superconducting motor quench detection method and apparatus based on rotational symmetry of a motor, belonging to the technical field of superconducting motor quench detection. The method includes: acquiring terminal voltages of each group of superconducting magnets in a superconducting motor, where the superconducting motor is pre-divided into at least two unit motors by using the rotational symmetry of the motor, and superconducting magnets located at corresponding positions are selected from the at least two unit motors as a group of superconducting magnets; calculating an absolute value of a terminal voltage difference of each group of superconducting magnets; and judging whether the absolute value exceeds a preset threshold, and if the absolute value exceeds the preset threshold, determining that the superconducting magnets are in a quench state. According to the present invention, induced voltages coupled by the terminal voltages of superconducting magnets are eliminated.

The invention belongs to the technical field of superconducting cables, and discloses a superconducting cable, a preparation method and a preparation device.The preparation method of the superconducting cable comprises the steps that a core wire, X superconducting wires and Y carbon fibers are prepared, the X superconducting wires and the Y carbon fibers are used for being woven on the surface of the core wire, and Y is smaller than or equal to X; spirally winding a hot melt adhesive film on the surfaces of the Y carbon fibers; the core wire, the superconducting wires and the carbon fibers are woven in a heating environment, and the X superconducting wires and the Y carbon fibers wound with the hot melt adhesive films are woven on the surface of the core wire under the heating condition; cooling the heated and braided superconducting cable through conveying; and after cooling, wrapping an insulating layer outside the superconducting braid layer formed by the superconducting wires and the carbon fibers. In conclusion, the superconducting braid layer of the superconducting cable is formed by mixing and weaving the superconducting wires and the carbon fibers, and the hot melt adhesive film is spirally wound on the surfaces of the carbon fibers, so that the core wires, the superconducting wires and the carbon fibers are bonded with one another after weaving, and the structural strength of the whole cable is improved.

The invention provides a water-cooled magnet magnetic field ripple shielding system, which belongs to the technical field of water-cooled magnets and comprises a thermostat and a superconducting block, the superconducting block is positioned in a constant-temperature cavity of the thermostat and is coaxial with a room-temperature hollow cavity in the center of the thermostat, liquid nitrogen is injected into the constant-temperature cavity, and when the superconducting block enters a superconducting state, the superconducting block is separated from the constant-temperature cavity. The sum of the induced magnetic flux variation of the water-cooled magnet power supply in the annular cavity of the superconducting block and the magnetic flux variation generated by the induced current of the superconducting block is zero, and the magnetic flux in the room temperature hollow cavity is in a steady state; the invention further provides a using method of the water-cooled magnet magnetic field ripple shielding system. Magnetic field ripples in an experiment sample space during a water-cooled magnet field stabilization experiment are shielded, the magnetic field stability of a water-cooled magnet magnetic field in the sample experiment space is ensured, the quality of the water-cooled magnet magnetic field is improved, and the signal-to-noise ratio of an experiment measurement signal is improved.

The present invention relates to a multi-objective optimization method for structure parameters of a superconducting cable, and a device and a medium. The method comprises the following steps: S1, acquiring structure parameters and performance parameters of a superconducting cable, setting constraint ranges of the structure parameters of the superconducting cable, constructing objective functions on the basis of the structure parameters and the performance parameters of the superconducting cable, and establishing a multi-objective optimization model of the structure parameters of the superconducting cable; and S2, iteratively solving the multi-objective optimization model of the structure parameters of the superconducting cable by means of an improved multi-objective grey wolf optimization algorithm to obtain optimal solutions of the structure parameters of the superconducting cable, wherein weight coefficients negatively correlated with the overall sensitivity indexes of the structure parameters of the superconducting cable are assigned to iteration coefficients in the multi-target grey wolf optimization algorithm so as to obtain the improved multi-target grey wolf optimization algorithm. Compared with the prior art, the present invention can further improve the optimization speed and optimization effect of structure parameters of superconducting cables.

The invention belongs to the technical field of superconducting material processing, and discloses a multi-barrier-layer MgB2 superconducting wire and a preparation method thereof. A plurality of groups of interlayers of the wire are composed of Cu / Ni / Nb, outer-layer copper serves as a stabilizer, Ni serves as a low-cost outer barrier layer, Ni and the outer-layer copper are mutually diffused in the hot extrusion process to form a stable Cu-Ni compound, and Nb foil is added into the Ni layer to serve as an inner barrier layer so as to restrain the diffusion problem of a small amount of Ni-Mg. According to the multi-barrier-layer MgB2 superconducting wire, Nb is greatly replaced by Cu / Ni, the raw material cost is remarkably reduced, the barrier layers are mutually diffused in the hot extrusion process to achieve metallurgical bonding, uniform deformation of the wire in the subsequent machining process is facilitated, the possibility of damage of the barrier layers is reduced, the current-carrying performance of the wire is improved, the Jc of the multi-barrier-layer MgB2 superconducting wire under 4.2 K and 3T is 5199-6271 A / mm < 2 >, and the service life of the multi-barrier-layer MgB2 superconducting wire is prolonged. And the current-carrying performance is obviously improved, and the application prospect is wide.

The invention relates to the technical field of superconducting material processing, in particular to a preparation method of an Nb3Sn superconducting wire. The method mainly comprises the steps that Nb-Zr alloy is loaded into the exterior and / or the center of a Sn-Cu single-core rod, oxide powder is filled between the Nb-Zr alloy and the Sn-Cu single-core rod, then the Sn-Cu single-core rod and the Nb-Zr alloy are loaded into a copper substrate, and Nb3Sn subcomponents are obtained after multi-pass stretching, forming and fixed-length cutting; and uniformly arranging the Nb3Sn sub-components in the copper pipe along the circumferential direction to form a bundle, and after multi-pass stretching, carrying out heat treatment and cutting to obtain the Nb3Sn superconducting wire. By introducing the artificial point pinning array in density gradient distribution, the critical current density of the Nb3Sn superconducting wire in a high magnetic field of 8T-16T is enhanced, the problems that an existing uniform artificial point pinning center scheme generates a matching effect and limits the actual application of the superconducting wire are solved, and the decline degree of the critical current density of the Nb3Sn superconducting wire in the high field is relieved.

A multi-objective optimization method for structural parameters of a superconducting cable, comprising steps of: S1, obtaining structural parameters and performance parameters of the superconducting cable, setting a constraint range of the structural parameters of the superconducting cable, based on the structural parameters and performance parameters of the superconducting cable, constructing an objective function, to establish a multi-objective optimization model of the structural parameters of the superconducting cable; and S2, through an improved multi-objective grey wolf optimization algorithm, iteratively solving the multi-objective optimization model of the structural parameters of the superconducting cable, to obtain an optimal solution for each of the structural parameters of the superconducting cable; where, to an iteration coefficient in a multi-objective grey wolf optimization algorithm, a weight coefficient negatively correlated with an overall sensitivity index of each of the structural parameters of the superconducting cable is given, to obtain the improved multi-objective grey wolf optimization algorithm.

An on-line program control excitation power supply with quench protection for a high-temperature superconducting magnet comprises a single-chip microcomputer for receiving control data, outputting control voltage through digital-to-analog conversion (DAC) of the single-chip microcomputer, and magnetizing a magnet coil through current stepping; a sampling signal is output to the liquid crystal screen to display corresponding voltage and current values in real time after being processed by the single-chip microcomputer analog-to-digital conversion ADC; voltage signals at the two ends of the magnet coil are sampled and returned to the single-chip microcomputer to be processed, when high voltage occurs, it is judged that the voltage signals are abnormal voltage signals, quench protection is carried out, the single-chip microcomputer outputs control signals to cut off connection between the magnet coil and the excitation power source, and residual energy of the magnet coil is released through the high-power thyristor. The provided excitation power supply has the characteristics of high power, high stability, good repeatability and good linearity; performing numerical control stepping output, gradually applying current to the superconducting coil, and slowly establishing a magnetic field; effective quench protection is achieved, and it is guaranteed that a magnet coil is not damaged by quench.

The invention relates to a superconducting electrical switch. The switch comprises two parallel branches of superconducting material in a loop, and a magnetic field generator which generates a time-varying magnetic field through the loop in a direction generally parallel to the axis of the loop. The magnetic field generator is selectively activated and de-activated to switch the electrical switch between a low-resistance state and a higher-resistance state. In the low-resistance state, there is no magnetic field through the loop and transport current flows through the loop. In the higher-resistance state, a magnetic field through the loop induces a screening current such that the sum of the transport current and the screening current is substantially equal to the critical current or is greater than the critical current of the superconducting material. The switch may be used in, for example, a rectifier or fault current limiter.

The invention relates to the technical field of cable preparation, in particular to a superconducting semi-rigid cable made of high-purity aluminum and a preparation method thereof.The method comprises the steps that the high-purity aluminum is adopted as an inner conductor, and the inner conductor is preprocessed; coating the surface of the pretreated inner conductor with a PTFE mixture by using a pushing machine at normal temperature to obtain a normal-temperature pushing core wire; the qualified normal-temperature pushing core wire is wound on a cable reel and then placed in a vacuum high-temperature furnace to be subjected to vacuum sintering so as to obtain an inner conductor wrapped with an insulating layer; and the inner conductor wrapped with the insulating layer penetrates into the processed pure aluminum outer conductor tube, and the outer conductor is wrapped with PTFE to form an outer protective sleeve. According to the invention, the performance stability of the superconducting semi-rigid cable preparation can be improved.

The utility model provides a superconducting cable assembly, a superconductor transmission line and a star simulator. The superconducting cable assembly comprises a superconducting cable and a connector, the superconducting cable comprises a cable body part and a cable connecting part, and the cable connecting part is arranged in the connector in a penetrating mode in the axial direction of the connector; the connector comprises a clamping assembly, the clamping assembly comprises a sleeve and a pressing block, the sleeve comprises a first clamping block and a second clamping block which are oppositely arranged in the circumferential direction of the sleeve and fixed to each other, a cavity is defined by the first clamping block and the second clamping block, the pressing block is arranged in the cavity in the axial direction of the sleeve, and a through hole for a cable connecting part to penetrate through is formed between the pressing block and the second clamping block; the axial direction of the sleeve is parallel to that of the joint; the first clamping block locks and fixes the pressing block through the locking structure so that the pressing block can be connected to the periphery of the cable connecting part in a pressed mode in the radial direction of the sleeve, the position, relative to the locking and fixing position of the first clamping block, of the pressing block in the radial direction of the sleeve can be adjusted, and the hole diameter of the through hole can be adjusted. The superconducting cable assembly has better adaptability and maintainability.

The utility model relates to a joint applied to a superconducting cable. The joint comprises a terminal assembly, a superconducting connecting piece and a fastening structure. The terminal assembly includes a cable mounting portion and a joint connecting portion. The superconducting connecting piece is provided with a plurality of layers of stacked superconducting strips welded on the terminal assembly, penetrates through a cable mounting part and a joint connecting part, and comprises a cable connecting end located at the cable mounting part and a conductor connecting end located at the joint connecting part, the superconducting strips in the cable connecting end are arranged in a first stepped structure, and the superconducting strips in the conductor connecting end are arranged in a second stepped structure; the end parts are arranged in a second step type structure in a superconducting tape of the superconducting cable. And the fastening structure is arranged at the joint connecting part and is used for rigidly connecting an external conductor. The stepped structure of the superconductive connecting piece can be electrically connected with the superconductive strip of the stepped structure formed at the end part of the superconductive cable in a one-to-one correspondence manner, so that the uniform distribution of current in the superconductive cable can be ensured, and the connection resistance between the superconductive cable and other conductors can be further reduced.

The invention belongs to the technical field of superconductive phase modifier stators, and relates to a power grid direct connection type ultrahigh voltage superconductive phase modifier stator cable winding fixing method, which is characterized in that a cable is fixed in a groove in segmented non-magnetic teeth, and the end part of the cable is bound and fixed; and the problem of local deformation of the cable winding caused by end electromagnetic stress and vibration can be avoided.

The invention discloses a preparation method of stable in-situ 14: 24 AEC second-phase Bi-2212 powder, which comprises the following steps: preparing powder with specific components by controlling the components of a Bi-2212 precursor solution, and then adjusting by a fine heat treatment process to obtain the stable in-situ 14: 24 AEC second-phase Bi-2212 powder. According to the method disclosed by the invention, components of a Bi-2212 precursor solution are controlled, the components of Bi-2212 precursor powder after heat treatment and the molar ratio of Sr to Ca are monitored to be within a specific range, and a heat treatment process is matched for adjustment, so that stable generation of a 14: 24 AEC second phase in the Bi-2212 precursor powder is ensured; the self-generated 14: 24 AEC second phase can improve the critical current density of the Bi-2212 superconducting material; the method is easy to operate, low in cost, high in controllability and operability and suitable for being rapidly applied to the field of Bi-2212 superconducting material preparation.

The present invention provides: a MgB2 superconducting wire that has a barrier layer of highly uniform thickness covering a MgB2 core and that reduces MgB2 filament defects and is suitable for thinning and lengthening; a MgB2 superconducting wire manufacturing method for manufacturing the same; a superconducting coil using the same; and a magnetic generator including the superconducting coil. A MgB2 superconducting wire (200) comprises: a core material (210); a MgB2 filament (220) in which a MgB2 core (221) is covered with a barrier layer (222); and a metal sheath (230). The MgB2 filament (220) has a barrier layer (222) thickness on the outer peripheral side of the wire not more than three times the barrier layer (222) thickness on the core side of the wire. The method for manufacturing the MgB2 superconducting wire includes a step for forming a single core wire, a step for forming an embedded material, a surface reduction processing step, and a heat treatment step. The embedded material is formed by arranging the single core wire in a recess formed in the outer surface of the core material or by incorporating a spacer in a gap.

The invention belongs to the technical field of superconducting materials, and discloses an internal tin method Nb3Sn superconducting wire integrated with a piezoelectric sensing function and a preparation method of the internal tin method Nb3Sn superconducting wire. According to the method, a piezoelectric functional layer and a dielectric layer are prepared on the surface of a SnAl alloy rod, a CuAg alloy rod is installed after drilling to form a composite rod, the composite rod is inserted into an inner tin method Nb3Sn / CuNb composite pipe to be drawn into a subcomponent, then the subcomponent is bundled and installed into a Ta pipe and an oxygen-free copper pipe, and the wire is prepared through multiple times of stretching. The piezoelectric functional layer can convert micro strain into measurable electric signals, in-situ real-time monitoring of mechanical stress and the like in the wire rod is achieved, the CuAg alloy bar can stabilize the tensile strength of the wire rod and promote generation of an Nb3Sn phase, and on the premise that the superconducting performance is not affected, the operation reliability and safety of the high-field magnet under the extreme working condition are improved.

The invention discloses an RC-IGCT-based superconducting hybrid DC circuit breaker, and relates to the topological structure and working principle analysis of DC circuit breakers. The circuit topology comprises two parts: (1) a resistance-type superconducting fault current limiter R-SFCL and a UDS isolation switch adopting a TP KEMA arc model are connected in series, and (2) a current commutation component composed of diodes VD1-VD4, a current injection branch and a current commutation branch. VD1-VD4 are used for conducting bidirectional current; the current injection branch comprises a pre-charging capacitor C, an inductor L and a thyristor T which are connected in series; the current commutation branch circuit is formed by connecting a power electronic switch, an RCD buffer branch circuit and an energy absorption branch circuit in parallel, and the energy absorption branch circuit is composed of a metal oxide lightning arrester; the invention further discloses a current breaking method of the superconducting hybrid direct-current circuit breaker. According to the invention, quick switching-off can be realized after fault current occurs, the rise rate of the fault current is limited, and the loss and the cost are low under the normal through-current condition.

The invention belongs to the technical field of quantum functional materials, and particularly relates to an FCC structure Mo-based medium-entropy carbide superconducting material and a preparation method thereof. According to the method, Mo, Ir and C are ground and pressed into blocks according to the stoichiometric ratio, the Mo3Ir2C polycrystalline block of a face-centered cubic structure is synthesized in one step through electric arc melting, the superconducting transition temperature of the Mo3Ir2C polycrystalline block is 3.33 K, and the upper critical field of the Mo3Ir2C polycrystalline block is 2.53 T. Meanwhile, Pt is further used for partially replacing Ir to prepare Mo3IrPtC, the valence electron concentration is increased to 6.83 from 6.67, the superconducting performance is further optimized, the transformation temperature reaches 3.50 K, and the upper critical field is increased to 4.05 T. The material is a new member of the superconducting family, provides a platform for exploring the superconducting performance of the middle / high-entropy carbide in the face-centered cubic structure, can be used in the fields of electric power communication and the like, enriches related researches, and promotes the practical application of the middle / high-entropy superconductor.