Low-loss high-temperature superconducting magnetic energy storage magnet

Abstract

The utility model discloses a low-loss high-temperature superconducting magnetic energy storage magnet which comprises a hollow framework, the framework comprises a core part, end plates are arranged at the two ends of the core part, and sleeves are arranged on the end plates; the outer side of the core part is wound with a cake type high-temperature superconducting magnet, the outer side of the cake type high-temperature superconducting magnet is wrapped with a magnetic strip, the outer side of the sleeve is sleeved with a magnetic circular ring, and the magnetic circular ring is fixed to the framework through a plug pin. According to the utility model, alternating current loss generated by the high-temperature superconducting magnet can be reduced, so that the thermal stability of the high-temperature superconducting energy storage magnet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of superconducting magnets, in particular to a low-loss high-temperature superconducting magnetic energy storage magnet. Background Art

[0002] High-temperature superconducting magnetic energy storage systems offer advantages such as high power density and fast response speed, providing unique advantages in improving power supply quality. High-temperature superconducting magnets are the core components of high-temperature superconducting magnetic energy storage systems. Second-generation high-temperature superconducting tapes are often used to manufacture high-temperature superconducting energy storage magnets due to their high critical current density and excellent mechanical properties.

[0003] During the charging and discharging process, superconducting energy storage magnets will be subjected to alternating current and alternating magnetic field. The alternating current and alternating magnetic field will cause AC loss in the high-temperature superconducting magnet. The AC loss will affect the thermal stability of the high-temperature superconducting energy storage magnet and increase the cooling cost. Utility Model Content

[0004] In order to solve the problem that high-temperature superconducting magnets will generate AC loss and affect the thermal stability of high-temperature superconducting energy storage magnets, the utility model proposes a low-loss high-temperature superconducting magnetic energy storage magnet, which reduces the AC loss of existing high-temperature superconducting energy storage magnets and improves the thermal stability of high-temperature superconducting magnets to solve the above problem.

[0005] The present application discloses a low-loss high-temperature superconducting magnetic energy storage magnet, characterized in that it comprises a hollow skeleton, the skeleton comprises a core, end plates are provided at both ends of the core, and sleeves are provided on the end plates;

[0006] A pancake-shaped high-temperature superconducting magnet is wound around the core, which is then coated with a magnetic strip. A magnetic ring is mounted on the sleeve, secured to the frame via a latch. The magnetic strip and ring provide magnetic conductivity, and when the high-temperature superconducting magnet operates in an alternating external field, the magnetic material shields the external magnetic field.

[0007] Preferably, the skeleton is made of epoxy resin material.

[0008] Preferably, the pancake-shaped high-temperature superconducting magnet is formed by winding a second-generation high-temperature superconducting tape and a polyimide insulating tape.

[0009] Preferably, the magnetic strip is an amorphous iron alloy.

[0010] Preferably, the magnetic ring is made of amorphous iron alloy.

[0011] Preferably, the latch is made of epoxy resin material.

[0012] Using epoxy resin for the frame and the pins can reduce the impact of eddy current losses in the frame and the pins on the low-temperature system.

[0013] Beneficial effects of the utility model:

[0014] (1) The magnetic strip and magnetic ring of the present invention can effectively conduct magnetism. When an external variable magnetic field is applied to the high-temperature superconducting magnet, the magnetic strip has the function of shielding the external magnetic field, which significantly weakens the magnetic field directly acting on the high-temperature superconducting magnet, thereby reducing AC loss.

[0015] (2) The magnetic strip and magnetic ring materials of the present invention are amorphous iron alloys. Compared with silicon steel and Permalloy commonly used in current electrical applications, amorphous iron alloys have high saturation magnetic induction intensity, high magnetic permeability and low loss characteristics, so that the magnetic shielding effect under high fields is still obvious.

[0016] (3) The purpose of winding a layer of magnetic tape on the outermost layer of the pancake-shaped high-temperature superconducting magnet in the present invention is to reduce the vertical field directly applied to the high-temperature superconducting magnet, thereby effectively reducing the AC loss of the high-temperature superconducting magnet under the vertical field.

[0017] (4) The skeleton and the latch in the present invention are made of non-metallic epoxy resin material, which can avoid the influence of the eddy current loss of the skeleton and the latch on the entire low-temperature system and further reduce the overall AC loss of the energy storage magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a low-loss high-temperature superconducting magnetic energy storage magnet according to an embodiment of the utility model;

[0019] Figure 2 This is a cross-sectional view of a low-loss high-temperature superconducting magnetic energy storage magnet according to an embodiment of the present invention.

[0020] The reference numerals are as follows:

[0021] 1-skeleton, 101-core, 102-end plate, 103-sleeve, 2-magnetic ring, 3-pancake-shaped high-temperature superconducting magnet, 4-magnetic strip, 5-pin. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of this application more clear, the application is further described in detail below with reference to the accompanying drawings and examples.

[0023] The present application discloses a low-loss high-temperature superconducting magnetic energy storage magnet, the structure of which is as follows: Figure 1 and Figure 2As shown, it includes a hollow skeleton 1, which includes a core 101. End plates 102 are provided at both ends of the core 101, and sleeves 103 are provided on the end plates 102. The shape of the skeleton 1 is easy to wind the pancake-shaped high-temperature superconducting magnet 3 and the magnetic strip 4, and easy to install the magnetic ring 2. The pancake-shaped high-temperature superconducting magnet 3 is wound on the outside of the core 101, and the magnetic strip 4 is wrapped on the outside of the pancake-shaped high-temperature superconducting magnet 3. The magnetic ring 2 is sleeved on the outside of the sleeve 103, and the magnetic ring 2 is fixed to the skeleton 1 by a pin 5. In order to clearly illustrate the winding situation of the pancake-shaped high-temperature superconducting magnet 3 and the magnetic strip 4 on the outside of the core 101, Figure 1 Using a partial cross-sectional view, in a specific embodiment, the outside of the core 101 is completely covered by the pancake-shaped high-temperature superconducting magnet 3 .

[0024] The frame 1 and latch 5 are made of epoxy resin, a material that is easy to process and exhibits minimal thermal shrinkage at low temperatures. This reduces the impact of eddy current losses in the frame 1 and latch 5 on the cryogenic system, further reducing the overall AC losses of the energy storage magnet. The pancake-shaped high-temperature superconducting magnet 3 is constructed from multi-layer windings of second-generation high-temperature superconducting tape and polyimide insulating tape in the same direction. Both the magnetic ribbon 4 and the magnetic ring 2 are made of an amorphous iron alloy.

[0025] In a specific embodiment, when manufacturing a low-loss high-temperature superconducting magnetic energy storage magnet, the surface of the second-generation high-temperature superconducting tape is first coated with a layer of polyimide insulating tape, and then the high-temperature superconducting tape coated with the polyimide tape is wound on the skeleton 1 to form a pancake-shaped high-temperature superconducting magnet 3, and then a layer of magnetic tape 4 is wound on the outermost layer of the pancake-shaped high-temperature superconducting magnet 3, and finally, the magnetic ring 2 is covered on the sleeves 103 at the upper and lower ends of the pancake-shaped high-temperature superconducting magnet 3 and fixed by the pin 5.

[0026] The magnetic strip 4 and magnetic ring 2 in this application are effective magnets. Therefore, when an externally variable magnetic field is applied to the pancake-shaped high-temperature superconducting magnet 3, the magnetic ring 2 and magnetic strip 4 shield the external magnetic field, significantly weakening the magnetic field directly acting on the pancake-shaped high-temperature superconducting magnet 3, thereby reducing AC losses. Furthermore, the magnetic strip 4 and magnetic ring 2 are made of an amorphous iron alloy. Compared to silicon steel and permalloy commonly used in electrical applications, amorphous iron alloys have high saturation magnetic induction, high magnetic permeability, and low loss, ensuring a significant magnetic shielding effect even under high fields.

[0027] In particular, due to the anisotropic properties of high-temperature superconducting tape, when a magnetic field of the same intensity is applied to the tape surface, the AC loss generated in a perpendicular field is much greater than the AC loss in a parallel field. The proposed method of winding a layer of magnetic tape 4 around the outermost layer of the pancake-shaped high-temperature superconducting magnet 3 can also reduce the perpendicular field directly applied to the high-temperature superconducting magnet, thereby effectively reducing the AC loss of the high-temperature superconducting magnet under the perpendicular field.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A low-loss high-temperature superconducting magnetic energy storage magnet, characterized in that: The invention comprises a hollow skeleton (1), wherein the skeleton (1) comprises a core (101), end plates (102) are provided at both ends of the core (101), and sleeves (103) are provided on the end plates (102); A pancake-shaped high-temperature superconducting magnet (3) is wound around the outside of the core (101), and a magnetic strip (4) is coated around the outside of the pancake-shaped high-temperature superconducting magnet (3). A magnetic ring (2) is sleeved around the outside of the sleeve (103), and the magnetic ring (2) is fixed to the frame (1) via a pin (5).

2. The low-loss high-temperature superconducting magnetic energy storage magnet according to claim 1, characterized in that: The skeleton (1) is made of epoxy resin material.

3. The low-loss high-temperature superconducting magnetic energy storage magnet according to claim 2, characterized in that: The pancake-shaped high-temperature superconducting magnet (3) is wound from a second-generation high-temperature superconducting tape and a polyimide insulating tape.

4. The low-loss high-temperature superconducting magnetic energy storage magnet according to claim 3, characterized in that: The magnetic strip (4) is an amorphous iron alloy.

5. The low-loss high-temperature superconducting magnetic energy storage magnet according to claim 4, characterized in that: The magnetic ring (2) is made of amorphous iron alloy.

6. The low-loss high-temperature superconducting magnetic energy storage magnet according to claim 5, characterized in that: The latch (5) is made of epoxy resin material.

Images