88 results about "Superconducting electric machine" patented technology

The invention belongs to the technical field of aviation electric propulsion, and relates to a hydrogen fuel cell superconducting hybrid electric propulsion system based on hydrogen and helium heat exchange cooling, which is suitable for megawatt level branch aircrafts and comprises a liquid hydrogen storage tank, a hydrogen and helium heat exchanger, a hydrogen fuel cell, a lithium battery, an inverter, a superconducting motor, a propeller and other core components. The liquid hydrogen storage tank vaporizes liquid hydrogen through the micro-channel plate type hydrogen-helium heat exchanger and stably supplies the vaporized liquid hydrogen to the hydrogen fuel cell to generate electric energy; helium is used for a low-temperature cooling loop and cooling key assemblies such as a superconducting motor, a low-temperature inverter, a superconducting cable and a hydrogen fuel cell, and it is ensured that the key assemblies stably operate at the optimal working temperature. The hydrogen fuel cell and the lithium battery cooperatively provide electric energy for the superconducting electric propulsion system, the integrated energy management controller dynamically adjusts the output power of the fuel cell and the lithium battery by adopting a state machine strategy, and accurate monitoring and optimal distribution of working parameters of all components are achieved. The optimal heat balance and power output are ensured to be realized in different flight stages such as takeoff, cruise and landing; according to the hydrogen fuel cell hybrid electric propulsion system based on hydrogen and helium heat exchange cooling, the power generation efficiency and the operation stability of the hydrogen fuel cell are remarkably improved, the overall energy conversion efficiency is improved, and the high-power and high-efficiency power extraction requirements of megawatt aircrafts are fully met.

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 present invention relates to the technical field of vibrating screens, and discloses a circular vibrating screen driven by a superconducting motor and a usage method. The circular vibrating screen driven by the superconducting motor includes a support base and a protective shell. Inside the protective shell, a stirring assembly and a displacement assembly are respectively provided. The displacement assembly is arranged below the stirring assembly. The stirring assembly includes a rotating ring. Four stirring plates arranged in a circumferential arrangement are hinged between the inner walls of the rotating ring. Two symmetrical torsion springs are provided between the stirring plates and the rotating ring. A first sliding groove is opened in the upper part of the front surface of the stirring plate, and a first pushing plate is slidably connected inside the first sliding groove. In the present invention, under the action of the distance sensor, the distance between the first pushing plate and the distance sensor can be detected in real time, and the materials accumulated at this time can be reflected according to the distance. Corresponding adjustments are made according to different accumulation degrees. When the first threshold is reached, the materials are diverted to pass through the first sieve mesh and the second aggregation ring simultaneously for screening, thereby improving the screening efficiency.

A superconducting machine system includes a superconducting electrical machine and a cryogenic vessel encompassing the superconducting electrical machine. The superconducting machine system includes a ramp lead assembly disposed within a vacuum vessel wall and having a first end and a second end. The first end of the ramp lead assembly is coupled in a fixed manner to the vacuum vessel wall and the second end is coupled to a high temperature superconductor power lead coupled to the superconducting switch. The ramp lead assembly includes a non-conductive support and a metal rod. The ramp lead assembly includes a thermal storage device coupled to the metal rod. The thermal storage device is configured to store heat, to limit heat transfer along the metal rod, and to limit an increase in temperature along the ramp lead assembly during the energization of the superconducting electrical machine.

The invention discloses a liquid hydrogen high-temperature superconducting motor and magnetofluid dual-power propulsion system, and aims to solve the problems that an existing ship propulsion system is single in power mode and insufficient in power density. The system comprises a liquid hydrogen storage and supply unit, a cooling unit, an energy conversion unit, a superconducting motor propulsion unit and a magnetofluid propulsion unit, the liquid hydrogen storage and supply unit conveys liquid hydrogen to the superconducting part through the cooling loop, the liquid hydrogen is converted into hydrogen through the heat exchanger after being cooled, the energy conversion unit converts the hydrogen into electric energy and outputs the electric energy in a matched mode, and the superconducting motor propulsion unit and the magnetic fluid propulsion unit generate mechanical energy or electromagnetic force through the electric energy to drive a ship. And the superconducting component is cooled by the cooling loop. The liquid hydrogen in the system has the dual functions of a cooling medium and fuel, a coolant and fuel do not need to be additionally configured, the requirements for silence, high thrust and rapid maneuvering are met, the power density is high, the environmental protection property is good, and the system is suitable for high-performance propelling scenes such as ships, especially submarines.

The invention belongs to the technical field of superconducting motor testing, and particularly relates to a background magnetic field simulation and testing device for motor superconducting coil quench detection and electromagnetic characteristic analysis. The device comprises an outer stator iron core, an inner stator iron core, an open type or closed type low-temperature container with a built-in superconducting coil device, and a device bracket, wherein the outer stator iron core and the inner stator iron core are coaxially arranged; the outer stator is composed of an outer stator iron core and a multi-phase armature winding embedded in a tooth groove of the outer stator iron core. The inner stator iron core is composed of an even-number-pole iron core salient pole and a pole shoe, and an air gap is formed between the two; the low-temperature container can be of an open structure or a closed structure, and can be flexibly selected according to different test requirements; symmetrical alternating current is introduced into the multi-phase armature winding of the outer stator to simulate the background magnetic field environment of the superconducting coil in motor operation, effective verification and quantitative analysis of the quench characteristic and the electromagnetic performance of the superconducting coil are realized, related tests can be completed without manufacturing a prototype, the experiment cost is remarkably reduced, and the safety and the reliability are improved.

The application discloses a superconducting motor rotor and a motor rotor low-temperature system. The superconducting motor rotor comprises an outer frame, a support framework, a superconducting magnet and an intermediate shaft. The inner part of the outer frame is formed with a vacuum cavity, the support framework is located in the vacuum cavity, the superconducting magnet is connected to the support framework, and the intermediate shaft is fixedly connected to the outer frame and located on the inner side of the support framework, thereby forming a rotor structure of the superconducting motor. The cooling assembly can realize the cooling of the superconducting magnet by cooling the support framework, so that the rotor is in a low-temperature environment. Since the intermediate shaft is internally provided with a mounting cavity, the mounting cavity can be used for mounting the low-temperature assembly of the cooling rotor. The low-temperature assembly is mounted in the inner part of the rotor, so that the land area of the external low-temperature system component can be effectively reduced. The vacuum cavity formed in the inner part of the outer frame can be heat-insulated, thereby creating a good low-temperature environment for the rotor.

The application belongs to the technical field of superconducting motor testing, and more particularly relates to a background magnetic field simulation and testing device for superconducting coil quench detection and electromagnetic characteristic analysis of a motor. The device comprises coaxially arranged outer and inner stator cores, an open or closed cryogenic container with a built-in superconducting coil device, and a device support; the outer stator is composed of an outer stator core and multiphase armature windings embedded in the tooth slots of the outer stator core; the inner stator core is composed of an even-pole core salient pole and a pole shoe, and an air gap is formed between the two; the cryogenic container can be of an open structure or a closed structure, and can be flexibly selected according to different testing requirements; by passing a symmetric alternating current into the multiphase armature windings of the outer stator, the background magnetic field environment of the superconducting coil in the motor operation is simulated, effective verification and quantitative analysis of the superconducting coil quench characteristics and electromagnetic performance are realized, the related tests can be completed without manufacturing a prototype, and the experimental cost is significantly reduced, and the safety and reliability are improved.

This application discloses a rotor comprising a rotor housing, a rotor shaft, a rotor core, and rotor windings. The rotor forms three coaxially distributed zones: a normal temperature zone, a first low-temperature zone, and a second low-temperature zone. The first low-temperature zone is located between the normal temperature zone and the second low-temperature zone. The temperature of the first low-temperature zone is lower than that of the normal temperature zone, and the temperature of the second low-temperature zone is lower than that of the first low-temperature zone. The rotor shaft is located in the normal temperature zone, while the rotor core and rotor windings are located in the second low-temperature zone. The rotor windings include coil leads, each coil lead comprising a conductor and a Peltier unit. At least a portion of the Peltier unit is in close contact with the conductor. One end of the conductor is connected to the second low-temperature zone, and the other end of the conductor passes through the rotor housing to the outside of the rotor. This application also provides a superconducting motor. This application reduces heat leakage by employing a normal temperature shaft and a three-temperature zone structure within the rotor, while also incorporating Peltier units on the coil leads of the rotor windings.

The application relates to the technical field of superconducting motors, in particular to a superconducting magnet support framework, a superconducting motor and a use method. The superconducting magnet support framework comprises a framework body, the framework body is provided with a first flow channel, the first flow channel is suitable for flowing with a cooling medium, and the outer circumferential surface of the framework body is suitable for winding a superconducting coil; a cold conducting plate is arranged on the outer circumferential surface of the framework body, and the cold conducting plate is fixedly connected with the framework body. The application separates the structure for cooling the superconducting coil and supporting the superconducting coil of the superconducting motor, thereby reducing the compactness of the superconducting coil and the problem that the superconducting coil occupies a larger space in the superconducting motor, and the application provides the superconducting magnet support framework, the superconducting motor and the use method.

The invention relates to a power system of a short-distance vertical take-off and landing aircraft and a control method, and the power system of the short-distance vertical take-off and landing aircraft comprises an engine, an outer duct air guide pipe, a rolling spray pipe, a superconducting motor, a liquid hydrogen storage tank and an ignition electric nozzle; inlets of the two outer duct air guide pipes are connected to the two sides of the engine and communicated with an outer duct of the engine. The two rolling spray pipes are connected to outlets of the two outer duct air entraining pipes, and nozzles are bent vertically downwards; the superconducting motor has an electric mode and a power generation mode, is connected to a low-pressure shaft of the engine through a transmission shaft, is located in front of the engine and is provided with a cooling flow channel. The superconducting motor is connected to a power supply system of the aircraft and the power system through a cable; the liquid hydrogen storage tank is arranged outside the engine and connected with an inlet of the cooling flow channel through a pipeline, and an outlet of the cooling flow channel is connected with the two rolling spray pipes through pipelines. The two ignition electric nozzles are arranged on the rolling spray pipe.

The invention provides a superconducting motor integrated thermal control system based on a special-shaped heat pipe and graphite foam, which comprises a special-shaped heat pipe assembly, a graphite foam heat expansion tile assembly and an air core stator, and is characterized in that the air core stator comprises a shell and an armature winding assembly, bionic fins are formed on the outer wall of the shell, and an enhancement layer is arranged on the inner wall of the shell; the graphite foam heat expansion tile assembly is embedded in the shell; the special-shaped heat pipe assembly comprises an evaporation end and a condensation end, the condensation end is embedded in the graphite foam heat expansion tile assembly, the evaporation end penetrates through the enhancement layer from the graphite foam heat expansion tile assembly and extends to the position between the two adjacent armature windings, and face-to-face contact is formed between the special-shaped heat pipe assembly and the armature winding assembly. The special-shaped heat pipe is in full contact with a heat generation hot spot of the armature winding, heat is quickly transferred to the graphite foam heat expansion tile through two-phase evaporative cooling, the graphite foam heat expansion tile expands heat in the circumferential direction, and efficient heat exchange is achieved by means of the low-resistance air flue and the bionic strengthening structure.

The invention relates to an unmanned reconnaissance aircraft engine power system and a control method thereof.The unmanned reconnaissance aircraft engine power system comprises an engine, a superconducting motor, a liquid hydrogen storage tank, a hydrogen-fired generator and a comprehensive energy management system; the superconducting motor has an electric mode and a power generation mode, is arranged in a front cavity of the engine and comprises a motor rotor and a motor stator, and the motor rotor is connected to a high-pressure shaft of the engine in a sleeving mode; the periphery of the motor rotor is sleeved with the motor stator, the motor stator is connected to the inner side of the engine front cavity through a pull rod, and heat exchange channels are formed in the periphery of the motor stator. The liquid hydrogen storage tank is arranged on the outer side of the engine and communicates with the heat exchange channel through a liquid hydrogen pipeline; the hydrogen-fired generator is arranged on the outer side of the engine and communicates with the heat exchange channel through a gas hydrogen pipeline; the comprehensive energy management system has an electric energy storage function, is arranged on the outer side of the engine, is connected with the superconducting motor and the hydrogen-fired generator through cables, and is connected to the unmanned aerial vehicle power supply system and the engine power supply system.

The invention belongs to the field of fan design, and particularly relates to a hydrogen combustion lift fan system which comprises a lift fan, a box type spray pipe, an output shaft, a main engine and a superconducting motor. The lift fan is coaxially and fixedly connected with the box type spray pipe, one end of the output shaft is connected with rotor blades of the lift fan, the other end of the output shaft is connected with the superconducting motor and the main engine, and the superconducting motor is coaxially arranged in the main engine. A liquid hydrogen tank is arranged on the outer side of the main engine, a rectifying support plate is arranged in the lift fan, and an ignition electric nozzle is arranged on a cartridge receiver of the lift fan; hydrogen in the liquid hydrogen tank can flow into the ignition electric nozzle after passing through the superconducting motor and the rectifying support plate, and is burnt and heated after ignition to generate thrust. The energy conversion mode of a traditional lift fan is optimized, the temperature of airflow behind the lift fan can be increased from 300 DEG C to 1000 DEG C or above, the lift amplification of the lift fan exceeds 150%, and the requirement of a power system for lift is met. According to the scheme, hydrogen for cooling the superconducting motor can be recycled.

The utility model provides a liquid hydrogen electric drive propulsion system, which comprises a liquid hydrogen storage tank, a hydrogen fuel cell stack, an electric power conversion unit, a superconducting motor and an executive component, the hydrogen fuel cell stack is arranged outside the liquid hydrogen storage tank and is connected with the liquid hydrogen storage tank through a pipeline, and the liquid hydrogen electric drive propulsion system is characterized in that the electric power conversion unit and the superconducting motor are arranged in the liquid hydrogen storage tank; the electric power conversion unit converts current generated by the hydrogen fuel cell stack and then conveys the current to the superconducting motor, and the output end of the superconducting motor penetrates through the liquid hydrogen storage tank and is in driving connection with the execution element; the power conversion unit and the superconducting motor are directly arranged in the liquid hydrogen storage tank, so that high system integration is realized, the pipeline complexity and leakage risk are reduced, and the reliability and safety of the system are improved; and compared with a high-temperature superconducting motor in the prior art, the superconducting motor arranged in the liquid hydrogen storage tank can make full use of the low-temperature characteristic of liquid hydrogen, the performance of superconducting materials is improved, and then the output power and efficiency of the motor are improved.

The invention relates to the technical field of heat dissipation, in particular to a built-in heat dissipation assembly of a superconducting motor, and solves the problems that when the built-in heat dissipation assembly of an air-cooled superconducting motor is used, wind power generated by the air-cooled heat dissipation assembly can only be continuously blown towards one part in the superconducting motor, the cooling effect is poor, and the heat dissipation efficiency is high. And along with the increase of the service time of the air-cooled heat dissipation assembly, a filter screen for filtering dust on the air-cooled heat dissipation assembly is gradually blocked. Comprising a superconducting motor rear shell. Through the filter screen self-dredging type air cooling mechanism, a plurality of strip-shaped filter screens for filtering operation can be dredged one by one in the wind cooling process, and meanwhile, the air supply range of the filter screen self-dredging type air cooling mechanism can be expanded through the comprehensive air cooling mechanism; according to the technical scheme, the overall heat dissipation effect of the equipment is improved, and meanwhile the conditions that the air volume is reduced, and heat dissipation of the motor is poor due to blockage of the strip-shaped filter screen can be avoided.

This invention provides a method and apparatus for superconducting motor quench detection based on sliding time filtering, relating to the field of superconducting motor quench detection technology. The method includes: differentially processing the terminal voltage signals of adjacent superconducting rotor magnets in the superconducting motor; conducting three trial runs of the superconducting motor before quench detection to obtain interference frequency data; establishing sliding time windows with both long and short time scales during the actual operation of the superconducting motor, and performing notch filtering on the differential voltage signals of adjacent superconducting rotor magnets; performing linear regression fitting on the filtered signals within the sliding time windows to extract effective quench signal feature values; and establishing a quench protection criterion based on the quench feature values. This invention solves the problem of achieving high reliability and rapid response in quench detection technology under the complex interference environment of superconducting motor rotation operation, a problem that is difficult to address in existing technologies.

The invention relates to the technical field of vehicles, in particular to a liquid hydrogen energy management system and a vehicle. The liquid hydrogen energy management system comprises a liquid hydrogen tank, a superconducting coil system, a superconducting motor, a buffer tank, a fuel cell, a power cell and an integrated controller. A liquid hydrogen outlet of the liquid hydrogen tank is communicated with a first cooling working medium inlet of the superconducting coil system, a first cooling working medium outlet of the superconducting coil system is communicated with an inlet of the buffer tank, and an outlet of the buffer tank is communicated with a hydrogen inlet of the fuel cell. A high-voltage interface of the integrated controller is electrically connected with the superconducting coil system, the motor, the fuel cell and the power cell; and a low-voltage control interface of the integrated controller is in signal connection with the liquid hydrogen tank, the superconducting coil system, the motor, the buffer tank, the fuel cell and the power cell. According to the liquid hydrogen energy management system, the vaporization process of liquid hydrogen can be effectively utilized, the energy utilization rate is increased, and the endurance mileage of a vehicle is increased.

This invention relates to the field of superconducting motor technology, and in particular to a low-loss superconducting motor and its design method. The low-loss superconducting motor includes a vacuum chamber, a stator assembly, and a mover assembly. The stator assembly includes a stator support frame with a planar top structure and a superconducting coil disposed on the planar structure. A protective cover is disposed above the superconducting coil, and a radiative heat shield is disposed on the protective cover. The mover assembly is disposed between the protective cover and the radiative heat shield. The mover assembly includes a frame-shaped mover support frame and a constant conductor coil. The temperature of the constant conductor coil is controlled by controlling the emissivity of the radiative heat shield, and the surface emissivity of the protective cover is used to cool the constant conductor coil. The invention also discloses a design method based on a low-loss superconducting motor. The air gap between the stator assembly and the mover assembly is small, which facilitates the achievement of a high magnetic field, reduces the Joule loss of the constant conductor coil, eliminates the need for air or water cooling pipes, and facilitates temperature control.

This application belongs to the technical field of the design of the power system for short takeoff and vertical landing aircraft, and specifically relates to a power system for short takeoff and vertical landing aircraft and its control method. By combining electric drive and mechanical drive, it replaces the pure mechanical drive form of a mechanical shaft-driven lift fan, which can reduce the complexity, weight, and design difficulty of the power system, shorten the length of the transmission shaft, and design to use liquid hydrogen to cool the superconducting motor. Moreover, it uses hydrogen combustion to generate lift, which can reduce the demand for power extracted from the engine, reduce the impact on engine performance, reduce the design difficulty of the engine, and can reduce the power of the transmission shaft, reduce the design difficulty and failure rate of the transmission shaft.

The invention belongs to the related technical field of superconducting, and discloses an annular superconducting armature winding topological structure and a superconducting motor. The armature winding is a high-temperature superconducting coil, and the high-temperature superconducting coil is embedded into each stator groove in an annular winding structure. Compared with a conventional fractional slot concentrated winding, more winding phase distribution and slot potential distribution can be provided for the superconducting motor, and more design freedom degrees are achieved; the influence of the direction of a magnetic field acting on a winding strip on the performance reduction of the strip can be greatly reduced, and the performance bottleneck caused by high harmonic loss and low slot fullness rate of a traditional concentrated / distributed winding is greatly reduced; the technical problems of alternating current loss accumulation, poor superconducting state stability and insufficient mechanical reliability of the superconducting armature winding in the MW-level aviation motor are effectively solved.

A cooling device and method for a high-temperature superconducting motor of a hydrogen-powered aircraft based on a dual evaporation-condensation cycle is provided. The latent heat of vaporization of liquid hydrogen fuel in the hydrogen-powered aircraft is used as the cooling source of the superconducting motor. The internal evaporation-condensation cycle can meet the cooling requirements of the superconducting motor during normal operation, and the external evaporation-condensation cycle can be used as a supplement to the cooling capacity of the device when the internal evaporation-condensation cycle is damaged or cannot meet the requirements. The coupling of the two effectively increases the adaptability of the cooling device to complex environments. When the supply of the liquid hydrogen is interrupted for a short time, the liquid nitrogen absorbs the heat of the high-temperature superconducting motor and vaporizes, ensuring the continuous operation of the high-temperature superconducting motor in extreme environments.

The invention discloses a cooling and energy supply integrated system for a motor and a control method, and relates to the technical field of liquid hydrogen cooling and hydrogen energy supply, the system comprises a liquid hydrogen storage tank, a cooling circulation system, a gasifier, a fuel cell system and an intelligent control unit; the intelligent control unit determines predicted values of the liquid hydrogen demand quantity of the cooling circulation system and the fuel cell system at the next moment based on the monitoring data at the current moment and the previous moment, and adjusts the flow of liquid hydrogen flowing into the cooling circulation system and the liquid hydrogen storage tank at the next moment and flowing into the gasifier based on the predicted values; the cooling circulation system performs heat exchange on the inflowing liquid hydrogen and the superconducting motor to cool the superconducting motor; the vaporizer vaporizes the liquid hydrogen flowing into the vaporizer from the liquid hydrogen storage tank and the liquid hydrogen subjected to heat exchange, and introduces the liquid hydrogen and the liquid hydrogen into the fuel cell system; the fuel cell system uses hydrogen as fuel to generate electricity. The comprehensive utilization efficiency of liquid hydrogen resources is improved, and the lightweight design requirement of the system is met.

A refrigerator for a superconducting motor and a superconducting motor, where the refrigerator includes a refrigeration assembly, a compressor inner stator, a compressor rotor and a compressor outer stator; the compressor inner stator is sleeved on an outer periphery of the cylinder, and the compressor outer stator is sleeved on an outer periphery of the compressor inner stator, and by providing a gap between the compressor rotor and an inner periphery of the compressor outer stator, the compressor outer stator is separated from the compressor inner stator and the compressor rotor, and the separated compressor outer stator is fixedly connected to a superconducting stator of the superconducting motor, and thus a power supply line connected to the compressor outer stator will not rotate.

The invention belongs to the technical field of short-distance vertical take-off and landing aircraft power system design, and particularly relates to a short-distance vertical take-off and landing aircraft power system and a control method thereof. The complexity, the weight and the design difficulty of the power system can be reduced, liquid hydrogen is designed to cool the superconducting motor, the hydrogen fuel cell is designed to utilize hydrogen to generate electricity, the requirement for extracting power from the engine can be reduced, the influence on the performance of the engine is reduced, and the design difficulty of the engine is reduced.

This invention belongs to the technical field of superconducting motor quench detection, and more specifically, relates to a superconducting motor quench detection method based on terminal voltage differential and unsupervised autoencoder. The method includes: acquiring the terminal voltage signal of a superconducting magnet; suppressing induced voltage interference through moving average differential processing; and obtaining a preprocessed signal after filtering; inputting this signal into a pre-trained unsupervised autoencoder model, which consists of an encoder and a decoder. The encoder extracts deep features through a convolutional neural network, a bidirectional long short-term memory network, and an attention mechanism; the decoder performs sequence reconstruction; and by calculating the reconstruction error and comparing it with an adaptive threshold, the quench state is detected and located. This invention solves the problem that the quench judgment threshold often relies on empirical settings and is difficult to adapt to the complex and ever-changing dynamic operating conditions of the motor.

The invention discloses a low-temperature cooling system for a superconducting rotor of a superconducting motor, belongs to the field of superconducting motors, and aims to solve the problems that an existing refrigerant transmission device for the superconducting rotor of the superconducting motor is complex in structure and poor in sealing possibly. Comprising a rotor cooling shell, a cooling inner stator, a refrigerant inlet pipe and a refrigerant outlet pipe device. The rotor cooling shell, the cooling inner stator, the refrigerant inlet and outlet pipe and the refrigerant outlet pipe form a cooling loop, a refrigerant is pumped into the cooling loop through the low-temperature pump, the rotor cooling shell is cooled in a convective heat exchange mode, and then the rotor iron core and the superconducting magnet assembly are cooled in a conduction cooling mode. The refrigerant inlet pipe and the refrigerant outlet pipe are static, so that a low-temperature medium is prevented from flowing through the rotary sealing joint, the low-temperature cooling structure is simplified, and the reliability of the superconducting rotor is improved.

The invention discloses a low-temperature circulating cooling system for a magnetic suspension superconducting magnet, which relates to the technical field of magnetic suspension and is characterized in that a cooling device is arranged on the superconducting magnet, and a refrigerating machine is arranged on the side surface of the cooling device; a built-in superconducting motor is arranged in the cooling device, a superconducting motor stator and a superconducting motor rotor are borne in the built-in superconducting motor through bearings, and the superconducting motor stator and the superconducting motor rotor are matched with the built-in superconducting motor outer Dewar through a secondary condenser to achieve a concentric state; the rotor sealing cylinder is arranged between the superconducting motor rotor and the superconducting motor stator, and the rotor sealing cylinder is connected with a circulating gas inlet and a circulating gas outlet. Through the built-in superconducting motor, the problems of rotating shaft heat conduction and heat leakage, gas heat transfer, rotating shaft high-pressure sealing and the like due to the fact that a driving motor is externally arranged in a traditional low-temperature circulating system are solved. The mode that the magnetic suspension magnet can only be cooled through liquid helium filling is avoided, and the operation cost is saved.

SUPERCONDUCTING MOTOR WITH COOLING SYSTEM The invention relates to a superconducting motor (100) comprising a rotor (102), a stator (112) outside the rotor (102) and traversed by an even number of holes (116), for each pair of holes (116), a coil (120) comprising a U-shaped base (202) and U-shaped sheets (204) and made of a superconducting material, where the sheets (204) are fixed to each other and to the base (202), where each column of a coil (120) is inserted into one of the holes (116) of the pair of holes (116). With such an arrangement, the manufacture of the coils and their installation are simplified. Fig. 1