High-temperature superconducting flux pump system

Abstract

The present invention provides a high temperature superconducting magnetic flux pump system. [Solution] The present invention relates to the technical field of superconducting magnetic excitation system, and discloses a high temperature superconducting magnetic flux pump system, which includes a magnetic flux pump body, a superconducting load, and a stator group, the double pancake coil group includes at least one double pancake coil, the stator group includes at least one stator, the magnetic flux pump body has an air gap for installing the stator group, and the superconducting load and the stator group are connected to form a closed loop. The present invention can simplify the structure without changing the magnetic structure and winding cost, and can solve the problem of slow charging speed while greatly reducing the power supply cost.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting magnet excitation systems, and particularly to a high-temperature superconducting magnetic flux pump system.

Background Art

[0002] Superconducting magnets are extremely important in the application fields of superconducting power. Compared with conventional permanent magnets and general electromagnets, they are lightweight, small in volume, can generate a stronger magnetic field, and have extremely low losses. Due to these advantages, superconducting magnets are applied in many fields such as medical, energy, and transportation.

[0003] The current difficulty in developing superconducting magnets lies in the fact that high-temperature superconducting coils do not operate in the permanent current mode. Since the current losses due to magnetic flux creep and welding resistance have not been completely solved, the current decay in the closed loop of high-temperature superconducting magnetism cannot be ignored.

[0004] Current magnetic flux pumps can provide a magnetization superconducting load method, which does not require a contact current lead between the low-temperature and normal-temperature environments and can isolate the thermal link between the low-temperature and non-low-temperature environments.

[0005] However, conventional magnetic flux pumps have drawbacks such as a slow charging speed and a complex structure.

Summary of the Invention

Problems to be Solved by the Invention

[0006] To solve the above technical problems, the present invention discloses a high-temperature superconducting magnetic flux pump system that can simplify the structure without changing the magnetic structure and winding cost, and can reduce the power supply cost while the charging current reaches several thousand amperes. The specific technical solutions of the present invention are as follows.

Means for Solving the Problems

[0007] A high-temperature superconducting flux pump system comprising: a flux pump body; a superconducting load; a stator group, wherein the stator group includes at least one stator, wherein the above-mentioned flux pump body has a gap for installing the stator group, and the above-mentioned superconducting load and the stator group are connected to form a closed loop.

[0008] Preferably, the above-mentioned flux pump body includes: an AC winding; a DC winding, wherein the above-mentioned DC winding is installed at one or both ends of the AC winding, and a first yoke. When the DC winding is installed at one end of the AC winding, one end of the above-mentioned first yoke is connected to the DC winding, and the other end extends to one end of the AC winding away from the DC winding. When the DC windings are installed at both ends of the AC winding, one end of the above-mentioned first yoke is connected to the DC winding located at one end of the AC winding, and the other end of the above-mentioned first yoke is connected to the DC winding located at the other end of the AC winding, and a magnetic loop is formed in the operating state of the flux pump, and the number of DC windings at both ends of the AC winding is the same. The gap for installing the stator group is located between the AC winding and the first yoke.

[0009] Preferably, the above-mentioned superconducting load has a pair of lead-in wire ends and lead-out wire ends, and both ends of the above-mentioned stator group are respectively connected to the lead-in wire ends and the lead-out wire ends to form a closed loop.

[0010] Preferably, it includes at least two superconducting loads, each of which has a pair of lead-in wire ends and lead-out wire ends, and each pair of lead-in wire ends and lead-out wire ends are respectively connected to the stator group to form a closed loop.

[0011] Preferably, there are two of the above-described first yokes, each of which is located at both longitudinal ends of the AC winding, and is connected to the DC windings at both ends of the AC winding respectively, and two magnetic loops are formed in the operating state of the magnetic flux pump.

[0012] Among them, there are two of the above-described stator groups, the two stator groups are located in different air gaps, and the two stator groups are connected in parallel and then connected to the superconducting load to form a closed loop.

[0013] Preferably, the two stator groups after parallel connection have two connection ends, and the above-described lead-in wire end and lead-out wire end are respectively connected to the two connection ends.

[0014] Preferably, the above-described stator group includes at least two stators, all the stators of each stator group are arranged in parallel, the two stator groups after parallel connection have two or more even-numbered connection ends, and all the connection ends are divided into two parts, one of which is connected to the lead-in wire end, and the other part is connected to the lead-out wire end.

[0015] Preferably, the above-described superconducting load has N single loads, where N≥2 and N is an even number.

[0016] There are two of the above-described stator groups, and each stator group has N / 2 stators.

[0017] In the superconducting load, N / 2 of the single loads correspond one by one to the stators in one of the stator groups and are connected to form a closed loop, and the other N / 2 single loads correspond one by one to the stators in the other stator group and are connected to form a closed loop.

[0018] Preferably, the superconducting load has M single loads, where M≥3 and M is an odd number.

[0019] There are two sets of the above-mentioned stators. One of the stator sets has (M - 1) / 2 stators, and the other has (M + 1) / 2 stators.

[0020] In the superconducting load, (M - 1) / 2 of the single loads respectively correspond to and are connected to the stators in one of the stator sets to form a closed loop, and the other (M + 1) / 2 single loads respectively correspond to and are connected to the stators in the other stator set to form a closed loop.

[0021] Preferably, there are two of the above-mentioned first yokes, each located at both longitudinal ends of the AC winding and respectively connected to the DC windings at both ends of the AC winding, and two magnetic loops are formed in the operating state of the flux pump.

[0022] There are two of the above-mentioned superconducting loads, each located at both longitudinal ends of the AC winding. Each superconducting load is connected to the stator set at the same end, and two closed loops are formed.

Advantages of the Invention

[0023] Compared with the prior art, the present invention realizes non-contact excitation of the superconducting load of the stator by using the AC winding and the DC winding. Among them, the above-mentioned DC winding is powered by a DC current source, and the current amplitude is variable. The AC winding is powered by a three-phase modulation inverter, and the AC current amplitude and the frequency of the current are variable. Thereby, the system makes the flux pump body generate a traveling wave magnetic field with a DC bias, generates a standard sine wave magnetic field in the AC winding, and generates a bias DC magnetic field in the DC winding. Based on this, the present invention optimizes the charging speed with a simple structure and provides a charging speed that is effectively and significantly faster at low cost and high efficiency. In addition, the present invention obtains a non-contact excitation system and can realize a superconducting DC output of thousands of amperes.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0025] In order for those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in more detail below based on specific embodiments.

[0026] In order to obtain a clearer understanding of the technical solution, in the embodiments described in detail below, the superconducting load 200 is described as a superconducting load, but it should be understood that the superconducting load may also be a superconducting cable or the like.

Embodiment

[0027] As shown in FIGS. 1 to 10, the high-temperature superconducting magnetic flux pump system includes a magnetic flux pump main body 100, a superconducting load 200, and a stator group 300. The above-mentioned superconducting load 200 includes at least one single load 201, the above-mentioned stator group 300 includes at least one stator 301, the above-mentioned magnetic flux pump main body 100 has a gap 400 for installing the stator group 300, and the above-mentioned superconducting load 200 and the stator group 300 are connected to form a closed loop.

[0028] In this embodiment, both the single load 201 and the stator 301 have high-temperature superconducting wires, specifically ReBCO wires. The wires are formed by laminating a Hastelloy layer, a ReBCO layer, and a buffer layer of a substrate from bottom to top. Its operating temperature is below 77K, and Re among them is a rare earth. Here, the superconducting load 200 described above is a double-pancake type coil group, and the single load 201 is a double-pancake type coil. That is, the superconducting load 200 described above is composed of at least one single load 201.

[0029] In this embodiment, in addition to the conventional circular single load 201, the single load 201 may also be in the shape of a racetrack similar to a standard 400M track. Of course, in addition to the double-pancake structure coil, different types of single-pancake type coils may also be used, and the description here is omitted.

[0030] To better use this embodiment, the magnetic flux pump body 100 described above includes an AC winding 101, a DC winding 102, and a first yoke 103. The DC winding 102 described above is installed at both ends of the AC winding 101. Both ends of the first yoke 103 are respectively connected to the DC windings 102 at both ends of the AC winding 101, and a magnetic loop is formed in the operating state of the magnetic flux pump. The gap 400 for installing the stator group 300 is located between the AC winding 101 and the first yoke 103.

[0031] The DC winding 102 described above is installed at both ends of the AC winding 101. One end of the first yoke 103 is connected to the DC winding 102 located at one end of the AC winding 101, and the other end of the first yoke 103 is connected to the DC winding 102 located at the other end of the AC winding 101. A magnetic loop is formed in the operating state of the magnetic flux pump. The gap 400 for installing the stator group 300 is located between the AC winding 101 and the first yoke 103.

[0032] In some other embodiments, the stator group 300 installed in the gap 400 can also be brought into contact with the first yoke 103 or the AC winding 101 between the AC winding 101 and the first yoke 103.

[0033] It should be noted that the above-mentioned AC winding 101 has tooth grooves 1011 for winding AC wires. Thus, the gap 400 for installing the stator group 300 is located between the tooth grooves 1011 and the first yoke 103.

[0034] As shown in FIG. 13, it should be noted that in this embodiment, both ends of the above-mentioned AC winding 101 are divided by the symmetry line of the AC winding 101. Specifically, the above-mentioned symmetry line is perpendicular to the central axis of the AC winding 101. It should be understood that the above-mentioned symmetry line is parallel to the extending direction of the horizontal plane projection of the tooth grooves 1011. Since the following embodiments are based on the same principle, the description will be omitted.

[0035] Furthermore, it should be noted that in this embodiment, the number of DC windings at both ends of the above-mentioned AC winding is the same. Thus, the usage requirements for the symmetry of the magnetic field are met.

[0036] Also, as shown in FIGS. 24 and 25, in different embodiments, they have structural features different from the above-mentioned embodiment. For the above-mentioned embodiment, there are two DC windings 102, each located at both ends of the AC winding 101. However, in another embodiment, it can also be applied to the situation where there is one DC winding 102. That is, when the DC winding 102 is installed at one end of the AC winding 101, one end of the above-mentioned first yoke 103 is connected to the DC winding 102, and the other end extends to the end of the AC winding 101 away from the DC winding 102.

[0037] As shown in FIGS. 11 and 12, for better use of this embodiment, the above-mentioned superconducting load 200 has a pair of lead-in wire ends and lead-out wire ends, and both ends of the above-mentioned stator group 300 are respectively connected to the lead-in wire ends and the lead-out wire ends to form a closed loop.

[0038] In this embodiment, the above-mentioned superconducting load 200 may be a single load 201, or may be a superconducting load 200 composed of a plurality of single loads 201. In any case, the superconducting load 200 has only one lead-in wire end and one lead-out wire end, and is connected to both ends of the stator group 300 through the above-mentioned lead-in wire end and lead-out wire end, thereby realizing a complete closed loop.

[0039] In this embodiment, the plurality of single loads 201 in the above-mentioned superconducting load 200 may be in contact without an interval, or may be placed at a certain interval from each other.

[0040] As shown in FIG. 13, in order to better use this embodiment, the above-mentioned superconducting load 200 includes at least two single loads 201 installed in parallel. Each single load 201 has a pair of lead-in wire ends and lead-out wire ends, and each pair of lead-in wire ends and lead-out wire ends are respectively connected to the stator group 300 to form closed loops respectively.

[0041] In this embodiment, the above-mentioned superconducting load 200 has a plurality of single loads 201. In the previous embodiment, those single loads 201 can be integrated so that the superconducting load 200 having a plurality of single loads 201 has only one lead-in wire end and one lead-out wire end. However, as a difference from the previous embodiment, in this embodiment, each single load 201 has one lead-in wire end and one lead-out wire end. Usually, in this embodiment, the number of stators 301 included in the above-mentioned stator group 300 is the same as that of the single loads 201. If not, the specific structure is the same as the embodiment in the previous embodiment in which a plurality of single loads 201 are integrated so that one superconducting load 200 has only one lead-in wire end and one lead-out wire end. Based on this, each stator 301 has two connection ends, which are connected to the lead-in wire end and the lead-out wire end of the corresponding single load 201.

[0042] Of course, even when the number of stators 301 of the stator group 300 is plural, the number of single loads 201 of the superconducting load 200 is plural, and the number of stators 301 is different from the number of single loads 201, the connection can be made by the connection form in the above-described embodiments. In the said embodiment, any two adjacent stators 301 should have an appropriate interval, and this installation method can be used in the following embodiments.

[0043] Regarding all of the above-described embodiments, they can be said to be single-sided excitation systems. That is, excitation is realized only at one end of the flux pump body 100. In this system, each DC winding 102 has only one set of DC coils. It should be noted that each DC winding 102 includes not only a DC coil but also a second yoke 104 connected to the first yoke 103. Therefore, it should be understood that in the DC winding 102, one end of the second yoke 104 is connected to the AC winding 101, the other end is connected to the first yoke 103, and the DC coil is wound around the second yoke 104. This is the same in the following embodiments, and the description is omitted.

[0044] It should be noted that in some other embodiments, in the single-sided excitation system, the role of the second yoke 104 is to connect the AC winding 101 to form a closed loop. In this case, the DC coil in the DC winding 102 can be wound around the first yoke 103 and is not limited to the second yoke 104. Of course, such a winding method can also be applied in the following embodiments, and the description of the same principle is omitted.

[0045] Based on any one of the above-described embodiments, the flux pump system can also realize excitation at both ends thereof. As shown in FIGS. 14 to 16, there are two of the above-described first yokes 103, each of which is located at both longitudinal ends of the AC winding 101 and is connected to the DC windings 102 at both ends of the AC winding 101, and two magnetic loops are formed in the operating state of the flux pump. There are two of the above-described superconducting loads 200, each of which is located at both longitudinal ends of the AC winding 101, and each superconducting load 200 is connected to the stator group 300 at the same end, and two closed loops are formed.

[0046] It should be noted that in any of the embodiments, the first yoke 103 and / or the second yoke 104 may be made of iron, or a ferromagnetic metal such as cobalt or nickel, and of course, a ferromagnetic alloy. In this embodiment, iron is adopted.

[0047] In this embodiment, each DC winding 102 has two DC coils, and the two DC coils are respectively arranged at both ends of the DC winding 102 where they are located. In this way, this embodiment is still a single-sided excitation system.

[0048] In this embodiment, both ends of the above-mentioned magnetic flux pump body 100 each have a superconducting load 200, so that each realizes excitation charging, and thus the charging efficiency can be stably improved.

[0049] Moreover, the above-mentioned single-sided excitation system is by no means a technical solution simply combining prior arts. In the actual research process, the inventor found that the charging efficiency of the excitation system is not due to the simple increase or decrease in the number of the simple stator 301 and / or the number of the single load 201, and various combination forms thereof also bring significant differences to the final charging effect. Based on the prior art and without changing the magnetic structure and winding cost, the object of significantly improving the charging efficiency is achieved. The bilateral excitation systems in the following embodiments are based on the same principle.

[0050] To better use this embodiment, a bilateral excitation system based on the single-sided excitation system is provided.

[0051] That is, there are two of the above-mentioned first yokes 103, each located at both longitudinal ends of the AC winding 101, and each is connected to the DC windings 102 at both ends of the AC winding 101, and two magnetic loops are formed in the operating state of the magnetic flux pump. Among them, there are two of the above-mentioned stator groups 300, the two stator groups 300 are located in different air gaps 400, and the two stator groups 300 are connected in parallel and then connected to the superconducting load 200 to form a closed loop.

[0052] In this embodiment, each DC winding 102 has two DC coils, and the two DC coils are respectively arranged at both ends of the DC winding 102 where they are located. Compared with the single-sided excitation system having the above two closed loops, in the double-sided excitation system, there is only one closed loop, and the closed loop includes two stator groups 300 connected in parallel and one superconducting load 200 connected to the above two stator groups 300.

[0053] As shown in FIG. 26, in the single-sided excitation system, when the DC winding 102 is installed at one end of the AC winding 101, the situation where one end of the above-mentioned first yoke 103 is connected to the DC winding 102 and the other end extends to one end of the AC winding 101 away from the DC winding 102 is also similarly applicable to the above-mentioned double-sided excitation system, so the description is omitted here.

[0054] As shown in FIG. 17, for better use of this embodiment, the two stator groups 300 after parallel connection have two connection ends, and the above-mentioned lead-in wire end and lead-out wire end are respectively connected to the two connection ends.

[0055] In this embodiment, the two stator groups 300 after parallel connection have only two connection ends. Regarding the lead-in wire end and the lead-out wire end, the superconducting load 200 may have only one lead-in wire end and one lead-out wire end, or a plurality of single loads 201 may each have a lead-in wire end and a lead-out wire end.

[0056] As shown in FIG. 18, for better use of this embodiment, the above-mentioned stator group 300 includes at least two stators 301. All the stators 301 of each stator group 300 are arranged in parallel. The two stator groups 300 after parallel connection have two or more even-numbered connection ends, and each connection end is divided into two parts, one of which is connected to the lead-in wire end and the other part is connected to the lead-out wire end.

[0057] Any one stator 301 can be connected to the superconducting load 200 to form a closed loop only when it has two connection ends. Therefore, in any one stator group 300 or any one stator 301, the number of its connection ends must be even.

[0058] In this embodiment, since the stator group 300 has several stators 301, the connection ends of half of these stators 301 are integrated into one, and the connection ends of the other half of these stators 301 are integrated into one, thereby realizing the connection of the closed loop.

[0059] At the same time, when the stator group 300 has only one stator 301 and the superconducting load 200 has a plurality of single loads 201, the connection method in this embodiment can also be used for connection. That is, the lead-in wire ends of all the single loads 201 are integrated into one lead-in wire end, and the lead-out wire ends of all the single loads 201 are integrated into one lead-out wire end, and then they are respectively connected to the two connection ends of the stator 301.

[0060] Of course, when the number of stators 301 in the stator group 300 is plural, the number of single loads 201 in the superconducting load 200 is plural, and the number of stators 301 is different from the number of single loads 201, the connection can also be performed according to the connection form in the above-mentioned embodiment.

[0061] As shown in FIGS. 19 to 21, in order to better use this embodiment, the above-mentioned superconducting load 200 has N single loads 201, where N≥2, N is an even number, the above-mentioned stator group 300 has two, and each stator group 300 has N / 2 stators 301. In the superconducting load 200, N / 2 of the single loads 201 correspond one by one to the stators 301 in one of the stator groups 300 and are connected to form a closed loop, and the other N / 2 single loads 201 correspond one by one to the stators 301 in the other stator group 300 and are connected to form a closed loop.

[0062] In this embodiment, N is described as 10. When the superconducting load 200 has 10 single loads 201, each stator group 300 has 5 stators 301. Based on this, each single load 201 has its own lead-in wire end and lead-out wire end, and each stator 301 has its own connection end. Thus, the lead-in wire ends and lead-out wire ends of 5 of the single loads 201 are respectively connected to the connection ends of 5 stators 301 in one of the stator groups 300, and the lead-in wire ends and lead-out wire ends of the other 5 single loads 201 are respectively connected to the connection ends of 5 stators 301 in another stator group 300.

[0063] Thus, when N is an even number such as 2, 4... 12, 14..., the connection form is consistent with the above-described embodiment.

[0064] As shown in FIGS. 22 and 23, for better use of this embodiment, the above-described superconducting load 200 has M single loads 201, where M≥3 and M is an odd number. There are 2 stator groups 300. One of the stator groups 300 has (M - 1) / 2 stators 301, and the other stator group 300 has (M + 1) / 2 stators 301. In the superconducting load 200, (M - 1) / 2 of the single loads 201 respectively correspond to and are connected to the stators 301 in one of the stator groups 300 to form a closed loop, and the other (M + 1) / 2 single loads 201 respectively correspond to and are connected to the stators 301 in the other stator group 300 to form a closed loop.

[0065] In this embodiment, an explanation will be given with M being 5. When the superconducting load 200 has five single loads 201, one of the stator groups 300 has two stators 301, and the other stator group 300 has three stators 301. Based on this, each single load 201 has its own lead-in wire end and lead-out wire end, and each stator 301 has its own connection end. As a result, the lead-in wire ends and lead-out wire ends of two of the single loads 201 are respectively connected to the two stators 301 in the stator group 300 that has two stators 301, and the lead-in wire ends and lead-out wire ends of the other three single loads 201 are respectively connected to the three stators 301 in the stator group 300 that has three stators 301.

[0066] Thus, when M is an odd number such as 3, 5, 7, 9..., its connection form is consistent with the above-described embodiment.

[0067] As shown in FIG. 27, for any one of the above-described embodiments, the stator group 300 can be replaced by a wide-type stator 500, and one wide-type stator 500 can realize power supply to at least one superconducting load. That is, in the embodiment using the wide-type stator 500, the superconducting load can be one, two, three, or a plurality.

[0068] The above is only a preferred embodiment of the present invention, and the present invention should not be regarded as being limited to the above-described preferred embodiment. The protection scope of the present invention shall be in accordance with what is defined by the scope of the patent claims. A person skilled in the art can make some improvements and modifications without departing from the spirit and scope of the present invention, and those improvements and modifications should also be regarded as belonging to the protection scope of the present invention.

Explanation of Reference Numerals

[0069] 100 Magnetic flux pump 101 AC winding 1011 Tooth groove 102 DC winding 103 First yoke 104 Second Yoke 200 Superconducting Load 201 Single Load 300 Stator Group 301 Stator 400 Air Gap 500 Wide Stator

Claims

1. A high-temperature superconducting flux pump system, comprising: a flux pump body; a superconducting load; a stator group, wherein the stator group includes at least one stator, wherein the flux pump body has a gap for installing the stator group, and the superconducting load and the stator group are connected to form a closed loop, when the superconducting load has N single loads, N≥2, N is an even number, and there are two stator groups, each stator group has N / 2 stators, and among them, N / 2 single loads correspond one by one to the stators in one of the stator groups and are connected to form a closed loop, and the other N / 2 single loads correspond one by one to the stators in the other stator group and are connected to form a closed loop, when the superconducting load has M single loads, M≥3, M is an odd number, and there are two stator groups, one of the stator groups has (M - 1) / 2 stators, and the other stator group has (M + 1) / 2 stators. In the superconducting load, (M - 1) / 2 single loads correspond one by one to the stators in one of the stator groups and are connected to form a closed loop, and the other (M + 1) / 2 single loads correspond one by one to the stators in the other stator group and are connected to form a closed loop, the flux pump body includes: an AC winding; a DC winding, wherein the DC winding is installed at one end of the AC winding, a first yoke, wherein one end of the first yoke is connected to the DC winding, and the other end extends to one end of the AC winding away from the DC winding, and the gap for installing the stator group is located between the AC winding and the first yoke. A high-temperature superconducting flux pump system is characterized in this way.

2. There are two first yokes, each located at both ends in a direction perpendicular to the central axis of the AC winding, there are two superconducting loads, each located at both ends in a direction perpendicular to the central axis of the AC winding, and each superconducting load is connected to the stator group at the same end, and two closed loops are formed. The high-temperature superconducting flux pump system according to Claim 1 is characterized in this way.

3. A high-temperature superconducting flux pump system, comprising: a flux pump body; a superconducting load; a stator group, wherein the stator group includes at least one stator, Among them, the magnetic flux pump body has a gap for installing a stator group, the superconducting load has a lead-in wire end and a lead-out wire end, and the lead-in wire end and the lead-out wire end are respectively connected to the stator group to form a closed loop. When the superconducting load has N single loads, N≥2, N is an even number, and there are two stator groups, each stator group has N / 2 stators. Among them, N / 2 single loads correspond one by one to the stators in one of the stator groups and are connected to form a closed loop. The other N / 2 single loads correspond one by one to the stators in the other stator group and are connected to form a closed loop. When the superconducting load has M single loads, M≥3, M is an odd number, and there are two stator groups. One of the stator groups has (M - 1) / 2 stators, and the other stator group has (M + 1) / 2 stators. In the superconducting load, (M - 1) / 2 single loads correspond one by one to the stators in one of the stator groups and are connected to form a closed loop. The other (M + 1) / 2 single loads correspond one by one to the stators in the other stator group and are connected to form a closed loop. The magnetic flux pump body is an AC winding, a DC winding, and the DC winding is installed at both ends of the AC winding. It includes a first yoke. Among them, one end of the first yoke is connected to the DC winding located at one end of the AC winding, and the other end of the first yoke is connected to the DC winding located at the other end of the AC winding. In the operating state of the magnetic flux pump, a magnetic loop is formed, and the number of DC windings at both ends of the AC winding is the same. The gap for installing the stator group is located between the AC winding and the first yoke. Among them, there are two first yokes, each located at both ends in a direction perpendicular to the central axis of the AC winding, and are respectively connected to the DC windings at both ends of the AC winding. In the operating state of the magnetic flux pump, two magnetic loops are formed. Among them, the stator group has two. The two stator groups are located in different gaps, and the two stator groups are connected in parallel and then connected to the superconducting load to form a closed loop. A high-temperature superconducting magnetic flux pump system is characterized in this way.

4. The high-temperature superconducting magnetic flux pump system according to claim 3, wherein the two stator groups after parallel connection have two connection ends, and the lead-in wire end and the lead-out wire end are respectively connected to the two connection ends.

5. The stator group includes at least two stators. All the stators of each stator group are arranged in parallel. The two stator groups after parallel connection have two or more even-numbered connection ends. Each connection end is divided into two parts. One part is connected to the lead-in wire end, and the other part is connected to the lead-out wire end. The high-temperature superconducting magnetic flux pump system according to claim 3 is characterized in that.

6. The superconducting loads are two, and each is located at both ends in a direction perpendicular to the central axis of the AC winding. Each superconducting load is connected to the stator group at the same one end, and two closed loops are formed. The high-temperature superconducting magnetic flux pump system according to claim 3 is characterized in that.

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