CN106443270B - High-temperature superconducting tape current-carrying capacity testing device and application method thereof - Google Patents
High-temperature superconducting tape current-carrying capacity testing device and application method thereof Download PDFInfo
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- CN106443270B CN106443270B CN201610940677.2A CN201610940677A CN106443270B CN 106443270 B CN106443270 B CN 106443270B CN 201610940677 A CN201610940677 A CN 201610940677A CN 106443270 B CN106443270 B CN 106443270B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application relates to a high-temperature superconductive tape current-carrying capacity testing device and a using method thereof, wherein the testing device comprises two binding posts, an insulating cover plate, a detachable shell, a current-carrying platform and two cooling conducting parts, wherein the current-carrying platform and the two cooling conducting parts are arranged in the shell, and the binding posts penetrate through the insulating cover plate; the cooling conductive part comprises a heat exchange heavy-current lead assembly and a superconducting current lead assembly which are electrically connected, wherein the heat exchange heavy-current lead assembly comprises an insulating storage tank, a cooling storage tank and a heavy-current lead part which are sequentially connected; the high-current lead parts are respectively and electrically connected with a binding post, and the cooling storage tank is communicated with a gas output channel arranged on the binding post; the superconducting current lead assembly comprises a first heat exchange seat, a superconducting tape and a second heat exchange seat which are electrically connected in sequence; the current carrying platform comprises an insulating plate, a first conductive piece provided with a heater, a second conductive piece provided with a temperature sensor and a cooling part; the first conductive piece and the second conductive piece are respectively and electrically connected with a second heat exchange seat. The device can measure the current carrying capacity of the high-temperature superconductive tapes at different temperatures.
Description
Technical Field
The application relates to the technical field of high-temperature superconductivity, in particular to a high-temperature superconductivity strip current-carrying capacity testing device and a using method thereof.
Background
Superconducting material refers to a material that exhibits a resistance equal to zero under certain low temperature conditions. The superconducting material may be classified into a high-temperature superconducting material and a low-temperature superconducting material according to the composition and the transition temperature, the low-temperature superconducting material being a superconducting material capable of operating under a liquid helium temperature condition, and the high-temperature superconducting material being a superconducting material capable of operating under a liquid nitrogen temperature condition. The low-temperature superconducting material is required to be applied under the condition of liquid helium temperature, so that the application of the low-temperature superconducting material is greatly limited, and the critical magnetic field of the high-temperature superconducting material is high, so that the high-temperature superconducting material has the potential of strong electricity application in a temperature region above liquid helium.
The strip material made of the high temperature superconducting material is called a high temperature superconducting strip. In recent years, the application of superconducting tapes in electric power equipment is increasing. Compared with common wires, the high-temperature superconductive strip has unique current carrying characteristic, and generally, the current carrying capacity of the high-temperature superconductive strip is attenuated to a certain extent at different temperatures. When the high-temperature superconducting material transmits alternating current, more alternating current loss is generated compared with direct current, so that the current carrying capacity of the superconducting tape is reduced, and the test of the current carrying capacity of the superconducting tape when transmitting alternating current is particularly important.
However, to date, there has been no test device that can directly measure the current carrying capacity of superconducting tapes at different temperatures.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides a high-temperature superconductive tape current-carrying capacity testing device and a using method thereof.
According to a first aspect of the embodiment of the application, a high-temperature superconductive tape current-carrying capacity testing device is provided, which comprises two binding posts, an insulating cover plate, a shell, a current-carrying platform and two cooling conductive parts, wherein the current-carrying platform and the two cooling conductive parts are arranged inside the shell,
the two binding posts vertically penetrate through the insulating cover plate and are fixedly connected with the insulating cover plate, and the insulating cover plate is detachably connected with the shell;
the cooling conductive part comprises a heat exchange heavy-current lead assembly and a superconducting current lead assembly, the heat exchange heavy-current lead assembly comprises an insulating storage tank, a cooling storage tank and a heavy-current lead part which are connected with each other, the heavy-current lead part penetrates through the cooling storage tank, one end of the insulating storage tank is communicated with the cooling storage tank, and the other end of the insulating storage tank is connected with a first through hole arranged on the shell;
one end of the high-current lead part of each cooling conducting part is respectively connected with a binding post, a gas output channel is arranged on each binding post, one end of each gas output channel is communicated with the cooling storage tank, and the other end of each gas output channel is connected with a second through hole arranged on the shell;
the superconducting current lead assembly comprises a superconducting tape, a first heat exchange seat and a second heat exchange seat, wherein the first heat exchange seat is electrically connected with the other end of the high-current lead part, one end of the superconducting tape is electrically connected with the first heat exchange seat, and the other end of the superconducting tape is electrically connected with the second heat exchange seat;
the current carrying platform comprises an insulating plate for setting a superconductive tape to be detected at high temperature; the two ends of the insulating plate are respectively provided with a first conductive piece and a second conductive piece, one end of the first conductive piece is flush with one end of the second conductive piece, a cooling part is arranged in a cavity surrounded by the first conductive piece and the second conductive piece, the top and the bottom of the cooling part are respectively provided with an insulating piece, the insulating piece arranged at the top of the cooling part is propped against the first conductive piece, and the insulating piece arranged at the bottom of the cooling part is propped against the second conductive piece;
the first conductive piece and the second conductive piece are respectively and electrically connected with the second heat exchange seat of one cooling conductive part; the first conductive piece and the second conductive piece are used for forming a conductive path for testing the high-temperature superconducting tape to be tested, the first conductive piece is provided with a heater, and the second conductive piece is provided with a temperature sensor.
Preferably, the superconducting current lead assembly further comprises a substrate arranged in parallel with the superconducting tape, two ends of the substrate are fixedly connected with the first heat exchange seat and the second heat exchange seat respectively, and the superconducting tape is attached to the substrate.
Preferably, the substrate comprises a stainless steel substrate.
Preferably, the high-current lead part comprises a fin-shaped high-current lead, the fin-shaped high-current lead comprises a lead central shaft and a plurality of fins fixed on the lead central shaft and concentric with the lead central shaft, and gaps exist between adjacent fins.
Preferably, the central axes of the heat exchange heavy current lead assembly and the superconducting current lead assembly are on the same straight line.
Preferably, the insulating plate comprises a convex insulating plate.
Preferably, the first conductive member includes a Z-shaped conductive member, and the second conductive member includes a U-shaped conductive member and a Z-shaped conductive member connected to each other.
Preferably, the enclosure comprises an insulated enclosure.
According to a second aspect of the embodiment of the present application, there is provided a method for using a high temperature superconductive tape current carrying capability test device, including:
fixing a superconductive strip to be detected on an insulating plate, and connecting one end of the superconductive strip to be detected with a first conductive piece and the other end with a second conductive piece;
covering the shell, and introducing liquid nitrogen into the insulating storage tank through the first through hole;
and regulating the temperature of the high-temperature superconducting tape to be tested, adding external alternating current with preset current to the two binding posts, and testing the current carrying capacity of the high-temperature superconducting tape to be tested.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
according to the high-temperature superconductive current-carrying capacity testing device to be tested, which is provided by the embodiment of the application, the testing device is electrified through the two binding posts, and low-temperature liquid gas such as liquid nitrogen and the like can be filled in the cooling storage tank in the heat exchange heavy-current lead assembly to cool the heavy-current lead part so as to keep the heavy-current lead part in a low-temperature state; one end of the insulation storage tank is communicated with the cooling storage tank, low-temperature liquid gas is provided for the cooling storage tank, and the other end of the insulation storage tank is externally connected with a liquid gas pipeline for insulating the externally connected liquid gas pipeline from the cooling storage tank; the current flows into the current carrying platform through the low-temperature high-current lead part through the superconducting current lead assembly, the superconducting current lead assembly adopts a superconducting tape, the superconducting tape has zero resistance, generates less heat when conducting electricity, and simultaneously can prevent the heat of the high-current lead part from being conducted to the current carrying platform to influence the test result; after current flows into the current carrying platform, the current is added to the high-temperature superconducting tape to be detected, which is arranged on the insulating plate, through the first conductive piece and the second conductive piece, and meanwhile, the cooling part which is arranged on the cavity surrounded by the first conductive piece and the second conductive piece is used for cooling the high-temperature superconducting tape to be detected, and the temperature of the high-temperature superconducting tape to be detected is accurately controlled through the heater temperature sensor, so that the current carrying capacity of the high-temperature superconducting tape to be detected under different temperatures can be measured by the testing device, and the testing result is accurate. By using the device, the current carrying capacity of the high-temperature superconducting tape at different temperatures can be directly measured, and the device is convenient and practical and has accurate test results.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic cross-sectional view of a device for testing the current carrying capacity of a superconductive tape according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a heat exchange heavy current lead assembly and a terminal according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a fin-shaped heavy current lead according to an embodiment of the present application;
fig. 4 is a schematic cross-sectional view of a superconducting current lead assembly according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional structure of a current-carrying platform according to an embodiment of the present application;
FIG. 6 is a schematic cross-sectional view of a heat insulation housing according to an embodiment of the present application;
in fig. 1-6, the symbols represent: the heat exchange type high-current lead assembly comprises a 1-heat exchange high-current lead part, a 111-fin-shaped high-current lead, a 1110-gap, 1111-fins, a 1112-lead central shaft, a 12-cooling storage tank, a 13-insulation storage tank, a 2-superconducting current lead assembly, a 21-superconducting tape, a 22-base material, a 23-first heat exchange seat, a 24-second heat exchange seat, a 3-current carrying platform, a 31-high-temperature superconducting tape to be tested, a 32-heater, a 33-insulating plate, a 34-cooling part, a 35-first conductive piece, a 36-second conductive piece, a 37-temperature sensor, a 38-insulating piece, a 4-binding post, a 41-gas output channel, a 5-shell, a 51-first through hole, a 52-second through hole, a 53-outer wall, a 54-inner wall, a 55-cavity and a 6-insulation cover plate.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
Fig. 1 is a schematic cross-sectional structure of a testing device for current carrying capability of a high temperature superconductive tape according to an embodiment of the present application, as shown in fig. 1, including two binding posts 4, a current carrying platform 3 and two cooling conductive parts, wherein,
the two terminals 4 may be connected to two output terminals of an external alternating current for energizing the testing device, and in a specific implementation, the terminals 4 comprise copper terminals.
The two binding posts 4 are respectively connected with a cooling conductive part, see fig. 2. As shown in fig. 2, the cooling conductive parts include heat exchange heavy current lead assemblies 1, the heat exchange heavy current lead assemblies 1 include heavy current lead parts 11, and one end of each heavy current lead part 11 of each cooling conductive part is respectively connected with one binding post 4.
The high-current lead portion 11 generates a large amount of heat when energized, and in order to prevent the heat from affecting the test result, it is necessary to cool the high-current lead portion 11 and keep it in a low-temperature state. In order to cool down the high-current lead part 11, the heat exchange high-current lead assembly 1 is further provided with a cooling storage tank 12, and the high-current lead part 11 is arranged inside the cooling storage tank 12 and penetrates through the cooling storage tank 12. When the cooling tank 12 is supplied with a low-temperature liquid gas such as liquid nitrogen gas, the low-temperature liquid gas directly cools the large-current lead portion 11 so as to be in a low-temperature state. In an embodiment of the present application, the cooling reservoir 12 comprises a stainless steel reservoir.
In order to make the low-temperature liquid cooled by the high-current lead part 11 flow out of the heat exchange high-current lead assembly 1, a gas output channel 41 is provided on the terminal 4, and referring to fig. 1, one end of the gas output channel 41 is communicated with the cooling tank 12, and the low-temperature liquid gas flowing through the high-current lead part 11 takes away the heat of the high-current lead part 11 and flows out of the gas output channel 41. In the specific implementation, the gas outlet 41 is insulated from the terminal post 4.
Because the heavy current lead part 11 will have heavy current to pass through when experimental, stainless steel storage tank also can electrified, in the implementation process, heat transfer heavy current lead assembly 1 has still set up insulating storage tank 13, insulating storage tank 13 both ends all open, one end with cooling storage tank 12 link up, and the other end is used for receiving low temperature liquid gas. In an embodiment, the insulating reservoir 13 comprises a cylindrical ceramic reservoir.
In order to make the heat generated by the high-current lead portion 11 be more removed by the low-temperature liquid gas, in the implementation process, the high-current lead portion 11 includes a fin-shaped high-current lead 111, referring to fig. 3, the fin-shaped high-current lead 111 is provided with a lead central shaft 1112 and a plurality of fins 1111, wherein the fins 1111 are fixed on the lead central shaft 1112 and are concentrically arranged with the lead central shaft 1112, and gaps 1110 are formed between adjacent fins 1111, so that the high-current lead portion 11 is fully contacted with the low-temperature liquid gas, thereby removing more heat and avoiding influencing the test.
In order to prevent the heat generated by the high-current lead portion 11 at the time of energization from affecting the test result, the temperature-lowering conductive portion is further provided with a superconducting current lead assembly 2, see fig. 4, the superconducting current lead assembly 2 including a superconducting tape 21. The large current flowing through the large current lead part 11 flows into the current carrying platform 3 through the superconducting tape 21, the superconducting tape 21 has zero resistance, a large amount of heat is not generated when the power is on, and the test result is not influenced when the current runs with zero resistance. In a specific implementation process, the central axes of the heat exchange heavy current lead assembly 1 and the superconducting current lead assembly 2 can be arranged on the same straight line.
The superconducting current lead assembly 2 is further provided with a first heat exchange seat 23 and a second heat exchange seat 24, the first heat exchange seat 23 is electrically connected with the other end of the high-current lead portion 11, and one end of the superconducting tape 21 is electrically connected with the first heat exchange seat 23, and the other end of the superconducting tape is electrically connected with the second heat exchange seat 24. In the embodiment of the present application, the first heat exchange seat 23 and the second heat exchange seat 24 both comprise metal heat exchange seats, which not only can conduct electricity, but also can dissipate heat quickly.
In a specific implementation process, the first heat exchange seat 23 and the other end of the high-current lead portion 11 may be fixedly connected by welding or the like, and may be fixed to each other and simultaneously be capable of flowing a high current. In addition, heat generated when the superconducting current lead assembly 2 is electrified is transferred through the large current lead portion 11 by the first heat exchange seat 23, so that the superconducting current lead assembly 2 is also in a low temperature state.
In the embodiment of the present application, in order to fix the superconducting tape 21, the superconducting current lead assembly 2 is further provided with a substrate 22 parallel to the superconducting tape 21, two ends of the substrate 22 are respectively fixedly connected with the first heat exchanging seat 23 and the second heat exchanging seat 24, and the superconducting tape 21 is attached to the substrate 22.
In the implementation process, the substrate 22 comprises a stainless steel substrate, the superconducting tape 21 and the stainless steel substrate form a composite superconducting current lead, the composite superconducting current lead is a zero-resistance lead, and the low-resistance circulation operation of current can be realized by adopting a composite structure.
Fig. 5 is a schematic cross-sectional structure of a current-carrying platform according to an embodiment of the present application, as shown in fig. 5, the current-carrying platform 3 is provided with a first conductive member 35 and a second conductive member 36, and one end of the first conductive member 35 and one end of the second conductive member 36 are respectively electrically connected with the second heat exchange seat 24 of one cooling conductive portion; the first conductive member 35 and the second conductive member 36 are used to form a conductive path for testing the high temperature superconducting tape to be tested.
In measuring the current carrying capacity of the high temperature superconducting tape 31, the high temperature superconducting tape 31 to be measured needs to be fixed on the current carrying platform 3, and therefore, the current carrying platform 3 is provided with an insulating plate 33 for fixing the high temperature superconducting tape 31 to be measured.
In this embodiment of the present application, the insulating board 33 includes a convex insulating board, the high temperature superconductive tape 31 to be tested is disposed on a boss of the convex insulating board, and the other end of the first conductive member 35 and the second conductive member 36 may be fixed on two sides of the convex insulating board and electrically connected to the high temperature superconductive tape 31 to be tested. In an embodiment, the insulating plate 33 includes a metal plate coated with an insulating material.
When testing the current carrying capability of the high temperature superconductive tape under different temperatures, the temperature of the high temperature superconductive tape 31 to be tested is usually reduced to 20K-77K, so the current carrying platform 3 is further provided with a temperature reducing part 34. In the embodiment of the application, in order to conveniently cool the high-temperature superconductive strip to be tested, one end of the first conductive piece 35 is arranged to be flush with one end of the second conductive piece 36, and a cooling part 34 is arranged in a cavity enclosed by the first conductive piece 35 and the second conductive piece 36; in order to realize insulation between the cooling portion 34 and the first conductive member 35 and the second conductive member 36, insulation members 38 are respectively disposed at the top and the bottom of the cooling portion 34, the insulation member 38 disposed at the top of the cooling portion 34 abuts against the first conductive member 35, and the insulation member 38 disposed at the bottom of the cooling portion 34 abuts against the second conductive member 36.
In a specific implementation process, the cooling portion 34 includes a stainless steel liquid helium tank, and liquid helium in the stainless steel liquid helium tank cools the high-temperature superconductive strip 31 to be tested through the first conductive member 35 and the second conductive member 36, so that the high-temperature superconductive strip to be tested can be cooled to a temperature of 20K-77K or lower, so as to meet the test requirement.
In the embodiment of the present application, the first conductive member 35 includes a Z-shaped conductive member, the second conductive member 36 includes a U-shaped conductive member and a Z-shaped conductive member that are connected to each other, and the shape of the cooling portion 34 is matched with the shape of the cavity enclosed by the first conductive member 35 and the second conductive member 36. Of course, in the implementation process, the first conductive element 35 and the second conductive element 36 may be configured in any other shape, and accordingly, the cooling portion 34 may be configured in any shape that matches the cavity defined by the first conductive element 35 and the second conductive element 36, which is not limited herein.
In order to precisely control the temperature of the high temperature superconducting tape 31 to be measured, the first conductive member 35 is provided with a heater 32, and the second conductive member 36 is provided with a temperature sensor 37.
Because the current-carrying platform 3 and two cooling conducting parts are in the low temperature state all the time during the test, in order to avoid the influence of external environment to the test, testing arrangement has still set up shell 5 and insulating apron 6, wherein, current-carrying platform 3 and two cooling conducting parts set up the inside of shell 5, two terminal 4 run through perpendicularly insulating apron 6, and with insulating apron 6 fixed connection. In order to facilitate the disassembly and assembly of the high-temperature superconducting tape to be heated, the shell 5 is detachably connected with the insulating cover plate 6.
The shell 5 and the insulating cover plate 6 isolate the current carrying platform 3 and the two cooling conductive parts from the outside, so that the current carrying platform 3 and the two cooling conductive parts are prevented from exchanging heat with the outside air.
The insulating housing 5 is provided with two first through holes 51 and two second through holes 52, referring to fig. 1, the first through holes 51 are respectively connected with the other end of the insulating storage tank 13 of one cooling conductive part, and the second through holes 52 are respectively connected with the other end of the gas output channel 41 of one binding post 4. In the specific implementation process, in order to avoid that a large current flows to the housing 5 to electrify the housing 5, the connection between the first through hole 51 and the insulating storage tank 13 and the connection between the second through hole 52 and the gas output channel 41 are all insulated.
In a specific implementation, the housing 5 comprises an insulated housing. In the embodiment of the present application, in order to better isolate external heat, the inside of the cavity 55 is provided with a vacuum, and both the inner wall 54 and the outer wall 53 can be made of metal materials. Of course, any other material may be used for the inner wall 54 and the outer wall 53 in the implementation process, which is not specifically limited herein.
The application provides a high-temperature superconductive tape current-carrying capacity testing device, which comprises two binding posts, an insulating cover plate, a shell, a current-carrying platform and two cooling conducting parts, wherein the current-carrying platform and the two cooling conducting parts are arranged in the shell; the cooling conductive part comprises a heat exchange heavy-current lead assembly and a superconducting current lead assembly, the heat exchange heavy-current lead assembly comprises an insulating storage tank, a cooling storage tank and a heavy-current lead part which are connected with each other, the heavy-current lead part penetrates through the cooling storage tank, one end of the insulating storage tank is communicated with the cooling storage tank, and the other end of the insulating storage tank is connected with a first through hole arranged on the shell; one end of the high-current lead part of each cooling conducting part is respectively connected with a binding post, a gas output channel is arranged on each binding post, one end of each gas output channel is communicated with the cooling storage tank, and the other end of each gas output channel is connected with a second through hole arranged on the shell; the superconducting current lead assembly comprises a superconducting tape, a first heat exchange seat and a second heat exchange seat, wherein the first heat exchange seat is electrically connected with the other end of the heavy current lead part, one end of the superconducting tape is electrically connected with the first heat exchange seat, and the other end of the superconducting tape is electrically connected with the second heat exchange seat; the current carrying platform comprises an insulating plate for setting a superconductive tape to be detected at high temperature; the two ends of the insulating plate are respectively provided with a first conductive piece and a second conductive piece, one end of the first conductive piece is flush with one end of the second conductive piece, a cooling part is arranged in a cavity surrounded by the first conductive piece and the second conductive piece, the top and the bottom of the cooling part are respectively provided with an insulating piece, the insulating piece arranged at the top of the cooling part is propped against the first conductive piece, and the insulating piece arranged at the bottom of the cooling part is propped against the second conductive piece; the first conductive piece and the second conductive piece are respectively and electrically connected with the second heat exchange seat of one cooling conductive part; the first conductive piece and the second conductive piece are used for forming a conductive path for testing the high-temperature superconducting tape to be tested, the first conductive piece is provided with a heater, and the second conductive piece is provided with a temperature sensor. According to the high-temperature superconductive tape current carrying capacity testing device provided by the embodiment of the application, the testing device is electrified through the two binding posts, and the interior of the cooling storage tank in the heat exchange high-current lead assembly can be filled with low-temperature liquid gas such as liquid nitrogen and the like, so that the high-current lead part is cooled, and the high-temperature superconductive tape current carrying capacity testing device is kept in a low-temperature state; one end of the insulation storage tank is communicated with the cooling storage tank, low-temperature liquid gas is provided for the cooling storage tank, and the other end of the insulation storage tank is externally connected with a liquid gas pipeline for insulating the externally connected liquid gas pipeline from the cooling storage tank; the current flows into the current carrying platform through the low-temperature high-current lead part through the superconducting current lead assembly, the superconducting current lead assembly adopts a superconducting tape, the superconducting tape has zero resistance, generates less heat when conducting electricity, and simultaneously can prevent the heat of the high-current lead part from being conducted to the current carrying platform to influence the test result; after current flows into the current carrying platform, the current is added to the high-temperature superconducting tape to be detected, which is arranged on the insulating plate, through the first conductive piece and the second conductive piece, and meanwhile, the cooling part which is arranged on the cavity surrounded by the first conductive piece and the second conductive piece is used for cooling the high-temperature superconducting tape to be detected, and the temperature of the high-temperature superconducting tape to be detected is accurately controlled through the heater temperature sensor, so that the current carrying capacity of the high-temperature superconducting tape to be detected under different temperatures can be measured by the testing device, and the testing result is accurate. By using the device, the current carrying capacity of the high-temperature superconducting tape at different temperatures can be directly measured, and the device is convenient and practical and has accurate test results.
In order to facilitate the better understanding of the technical scheme by those skilled in the art, the following further description is given with reference to the use method of the high-temperature superconductive tape current-carrying capability test device.
Opening the shell 5, fixing the high-temperature superconductive strip 31 to be tested on the insulating plate 33, and connecting one end of the high-temperature superconductive strip 31 to be tested with the first conductive piece 35 and the other end with the second conductive piece 36, so that the first conductive piece 35, the high-temperature superconductive strip 31 to be tested and the second conductive piece 36 form a conductive path. After the high temperature superconducting tape 31 is fixed, the temperature reducing part 34 reduces the temperature of the high temperature superconducting tape 31 to be measured through the first conductive piece 35 and the second conductive piece 36.
The shell 5 is covered, and liquid nitrogen is introduced into the insulating storage tank 13 through the first through hole 51, so that the two cooling conductive parts are cooled to a low temperature state.
The temperature of the high temperature superconducting tape 31 to be measured is regulated by the heater 32 and the temperature sensor 37, and the two binding posts 4 are electrified, so that the current carrying capacity of the high temperature superconducting tape to be measured is tested. The temperature of the high temperature superconducting tape 31 to be measured is precisely controlled by the heater 32 and the temperature sensor 37, and the current carrying capacity of the high temperature superconducting tape 31 to be measured at different temperatures can be measured by setting the high temperature superconducting tape 31 to be measured at different temperatures.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the application herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (9)
1. The device for testing the current carrying capacity of the high-temperature superconductive tape is characterized by comprising two binding posts (4), an insulating cover plate (6), a shell (5), a current carrying platform (3) and two cooling conductive parts, wherein the current carrying platform (3) and the two cooling conductive parts are arranged in the shell (5),
the two binding posts (4) vertically penetrate through the insulating cover plate (6) and are fixedly connected with the insulating cover plate (6), and the insulating cover plate (6) is detachably connected with the shell (5);
the cooling conductive part comprises a heat exchange heavy current lead assembly (1) and a superconducting current lead assembly (2), the heat exchange heavy current lead assembly (1) comprises an insulation storage tank (13), a cooling storage tank (12) and a heavy current lead part (11) which are connected with each other, the heavy current lead part (11) penetrates through the cooling storage tank (12), one end of the insulation storage tank (13) is communicated with the cooling storage tank (12), and the other end of the insulation storage tank is connected with a first through hole (51) arranged on the shell (5);
one end of the high-current lead part (11) of each cooling conducting part is respectively connected with a binding post (4), a gas output channel (41) is arranged on the binding post (4), one end of the gas output channel (41) is communicated with the cooling storage tank (12), and the other end of the gas output channel is connected with a second through hole (52) arranged on the shell (5);
the superconducting current lead assembly (2) comprises a superconducting tape (21), a first heat exchange seat (23) and a second heat exchange seat (24), wherein the first heat exchange seat (23) is electrically connected with the other end of the high-current lead part (11), one end of the superconducting tape (21) is electrically connected with the first heat exchange seat (23), and the other end of the superconducting tape is electrically connected with the second heat exchange seat (24);
the current carrying platform (3) comprises an insulating plate (33) for arranging a high-temperature superconducting tape (31); the insulation board is characterized in that a first conductive piece (35) and a second conductive piece (36) are respectively arranged at two ends of the insulation board (33), one end of the first conductive piece (35) is flush with one end of the second conductive piece (36), a cooling part (34) is arranged in a cavity surrounded by the first conductive piece (35) and the second conductive piece (36), insulating pieces (38) are respectively arranged at the top and the bottom of the cooling part (34), the insulating pieces (38) arranged at the top of the cooling part (34) are abutted against the first conductive piece (35), and the insulating pieces (38) arranged at the bottom of the cooling part (34) are abutted against the second conductive piece (36);
the first conductive piece (35) and the second conductive piece (36) are respectively electrically connected with the second heat exchange seat (24) of one cooling conductive part; the first conductive piece (35) and the second conductive piece (36) are used for forming a conductive path for testing the high-temperature superconducting tape (31) to be tested, the heater (32) is arranged on the first conductive piece (35), and the temperature sensor (37) is arranged on the second conductive piece (36).
2. The device for testing the current carrying capacity of the high-temperature superconductive tape according to claim 1, wherein the superconductive current lead assembly (2) further comprises a base material (22) arranged in parallel with the superconductive tape (21), two ends of the base material (22) are fixedly connected with the first heat exchanging seat (23) and the second heat exchanging seat (24) respectively, and the superconductive tape (21) is attached to the base material (22).
3. The high temperature superconducting tape current carrying capability test apparatus of claim 2, wherein the substrate (22) comprises a stainless steel substrate.
4. The high-temperature superconducting tape current carrying capacity testing device according to claim 1, wherein the high-current lead part (11) comprises a fin-shaped high-current lead (111), the fin-shaped high-current lead (111) comprises a lead central shaft (1112) and a plurality of fins (1111) fixed on the lead central shaft (1112) and concentric with the lead central shaft (1112), and gaps (1110) are formed between adjacent fins (1111).
5. The high-temperature superconducting tape current-carrying capacity testing device according to claim 1, wherein the central axes of the heat exchange high-current lead assembly (1) and the superconducting current lead assembly (2) are on the same straight line.
6. The high temperature superconducting tape current carrying capacity testing device according to claim 1, wherein the insulating plate (33) comprises a convex insulating plate.
7. The device for testing the current carrying capacity of the high temperature superconducting tape according to claim 1, wherein the first conductive member (35) comprises a Z-shaped conductive member, and the second conductive member (36) comprises a U-shaped conductive member and a Z-shaped conductive member connected to each other.
8. The high temperature superconducting tape current carrying capacity testing device according to claim 1, wherein the housing (5) comprises an insulating housing.
9. A method for using a high-temperature superconductive tape current-carrying capacity testing device, applied to the testing device according to any one of claims 1 to 8, comprising:
fixing a high-temperature superconducting tape (31) to be tested on an insulating plate (33), and connecting one end of the high-temperature superconducting tape (31) to be tested with a first conductive piece (35) and the other end of the high-temperature superconducting tape to be tested with a second conductive piece (36);
covering the shell (5), and introducing liquid nitrogen into the insulating storage tank (13) through the first through hole (51);
and adjusting the temperature of the high-temperature superconducting tape (31) to be tested, adding external alternating current with preset current to the two binding posts (4), and testing the current carrying capacity of the high-temperature superconducting tape (31) to be tested.
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| CN111751579A (en) * | 2020-05-21 | 2020-10-09 | 西部超导材料科技股份有限公司 | Design method of large current-carrying critical current sample rod |
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