CN217789303U

CN217789303U - Quench protection circuit of superconducting magnet and superconducting magnet

Info

Publication number: CN217789303U
Application number: CN202220826187.0U
Authority: CN
Inventors: 周伟; 王新文; 陈慧星; 刘坤; 张意; 刘旭洋; 梁思源; 王雪晴; 于金鹏; 陈松
Original assignee: Casic Feihang Technology Research Institute of Casia Haiying Mechanical and Electronic Research Institute
Current assignee: Casic Feihang Technology Research Institute of Casia Haiying Mechanical and Electronic Research Institute
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-11-11
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a quench protection circuit and superconducting magnet of superconducting magnet, the circuit includes forward diode, the fixed bolster, backward diode, first wire, second wire and third wire, the fixed bolster is conducting metal, its one side is provided with first support recess and first fixed plate, the opposite side is provided with second support recess and second fixed plate, it is first, the second fixed plate is used for fixed with the superconducting magnet, forward diode arranges first support recess in, the positive pole is located outside first support recess and the negative pole is located first support recess, backward diode arranges second support recess in, the positive pole is located second support recess and the negative pole is located outside the second support recess, first wire one end is connected and the other end is connected with the second fixed plate with superconducting coil one end, second wire one end is connected and the other end is connected with the negative pole of backward diode with the positive pole of forward diode, third wire one end is connected and the positive pole of forward diode and the other end is connected with superconducting coil's the other end.

Description

Quench protection circuit of superconducting magnet and superconducting magnet

Technical Field

The utility model relates to a superconducting magnet technical field especially relates to a quench protection circuit and superconducting magnet of superconducting magnet.

Background

When the superconducting magnet loses time, the superconducting wire inside the superconducting coil changes from a superconducting state to a resistance state and gradually spreads outwards from the quench area until the whole superconducting coil changes into the resistance state.

Because the service environment of the superconducting magnet is generally high current, and the transition from the superconducting state to the resistance state can be completed within a short time when the low-temperature superconducting magnet is out of time, as can be known from ohm's law, when the superconducting magnet is out of time, the voltage at two ends of the superconducting magnet is equal to the current of the superconducting magnet multiplied by the resistance value of the superconducting magnet after the quench. Assuming that the normal operating current of the superconducting magnet is 200A, the voltages at two ends of the superconducting coil in the early stage of quench are mainly inductive voltage, and the resistive voltage is mainly resistive voltage after the current decay rate is reduced. Without the quench protection circuit, the maximum voltage across the superconducting magnet can reach several kilovolts during a quench.

High voltages of several kilovolts may directly break down the insulation of the internal windings of the superconducting magnet, causing permanent damage to the superconducting magnet. Therefore, a quench protection circuit of the superconducting magnet is needed to clamp the voltage at the two ends of the superconducting magnet, so as to prevent the superconducting magnet from being irreversibly damaged due to the overhigh voltage at the two ends of the superconducting magnet during quench.

SUMMERY OF THE UTILITY MODEL

The utility model provides a quench protection circuit and superconducting magnet of superconducting magnet can solve the technical problem among the prior art.

The utility model provides a quench protection circuit of superconducting magnet, wherein, this circuit includes forward diode, fixed bolster, backward diode, first wire, second wire and third wire, the material of fixed bolster is electrically conductive metal, fixed bolster one side is provided with first support recess and first fixed plate, and the opposite side is provided with second support recess and second fixed plate, first fixed plate with the second fixed plate is used for fixing with the superconducting magnet, the forward diode is arranged in the first support recess, and the positive pole of forward diode is located outside the first support recess and the negative pole is located in the first support recess, the backward diode is arranged in the second support recess, and the positive pole of backward diode is located in the second support recess and the negative pole is located outside the second support recess, the one end of first wire is connected with the one end of the superconducting coil of superconducting magnet and the other end with the second fixed plate is connected, second wire one end with the positive pole of forward diode is connected and the other end with the negative pole of backward diode is connected, third wire with the other end of forward diode and the other end of superconducting coil are connected.

Preferably, the size of the forward diode matches the size of the first holder recess, and the size of the backward diode matches the size of the second holder recess.

Preferably, the forward diode and the backward diode are columnar diodes, the first bracket groove and the second bracket groove are columnar grooves, and one end of each columnar diode is a positive electrode while the other end of each columnar diode is a negative electrode.

Preferably, the cylindrical diode is provided with an external thread, the cylindrical groove is provided with an internal thread, and the cylindrical diode and the cylindrical groove are connected through the matching of the external thread and the internal thread.

Preferably, the fixing bracket further includes a fastening member for fastening the forward diode and the reverse diode.

Preferably, the fastener is a fastening screw.

Preferably, the circuit further comprises a connector by which the first and second fixed plates are fixed with the superconducting magnet.

The utility model also provides a superconducting magnet, wherein, including superconducting coil and foretell quench protection circuit.

Through the technical scheme, the number of the connected wires can be reduced while the electrical connection is realized through the fixing support, and the fixing support can also be used for reliably fixing the two diodes so as to provide reliable quench protection for the superconducting magnet.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 shows a schematic diagram of a quench protection circuit for a superconducting magnet according to an embodiment of the invention;

fig. 2 shows a view of a fixing support according to an embodiment of the invention.

Description of the reference numerals

1 a forward diode; 2, fixing a bracket; 3 a reverse diode; 4 a first conductive line;

5 a second conductive line; 6 a third conductive line; 7 superconducting coils.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 shows a schematic diagram of a quench protection circuit for a superconducting magnet according to an embodiment of the invention.

As shown in fig. 1, an embodiment of the present invention provides a quench protection circuit for a superconducting magnet, where the circuit includes a forward diode 1, a fixed bracket 2, a backward diode 3, a first lead 4, a second lead 5 and a third lead 6, the fixed bracket 3 is made of conductive metal, one side of the fixed bracket 2 is provided with a first bracket groove and a first fixed plate, and the other side is provided with a second bracket groove and a second fixed plate, the first fixed plate and the second fixed plate are used for being fixed with the superconducting magnet, the forward diode 1 is disposed in the first bracket groove, an anode of the forward diode 1 is located outside the first bracket groove and a cathode of the forward diode 1 is located in the first bracket groove, the backward diode 3 is disposed in the second bracket groove, and an anode of the backward diode 3 is located in the second bracket groove and a cathode of the backward diode 3 is located outside the second bracket groove, one end of the first lead 4 is connected to one end of a superconducting coil 7 of the superconducting magnet and the other end of the forward diode 1 is connected to the other end of the superconducting magnet, and one end of the backward diode 5 is connected to the superconducting coil 7 of the superconducting magnet and the other end of the forward diode is connected to the other end of the forward diode 1.

By the technical scheme, the number of the connected wires can be reduced while the electrical connection (namely, the electrical connection of the positive and negative electrodes of the two diodes) is realized through the fixing support, and the two diodes can be reliably fixed by the fixing support so as to provide reliable quench protection for the superconducting magnet.

According to the utility model relates to an embodiment, the size of forward diode 1 with the size of first support recess matches, the size of backward diode 3 with the size of second support recess matches.

That is, the first and second bracket grooves of the fixing bracket may be processed according to the sizes of the forward diode and the backward diode to ensure that the diodes are fitted with the corresponding grooves (i.e., so that the diodes can be just mounted into the grooves of the fixing bracket).

According to the utility model relates to an embodiment, forward diode 1 with backward diode 2 is the column diode, first support recess with second support recess is the column recess (promptly, the round hole), column diode one end is anodal and the other end is the negative pole.

According to the utility model relates to an embodiment, the column diode has the external screw thread, the column recess has the internal thread, the column diode with the column recess is realized being connected through external screw thread and internal screw thread cooperation.

That is, the pillar diode in the pillar groove may be fastened by means of screw-fitting.

According to the utility model relates to an embodiment, fixed bolster 3 still includes the fastener, is used for right forward diode 1 with backward diode 3 fastens.

That is, the diode may be further fastened by a fastener based on the above-described screw fastening; alternatively, the diode may be fastened only with the fastener.

According to an embodiment of the invention, the fastener is a fastening screw.

It will be appreciated by those skilled in the art that the above-described fastening screws are merely exemplary and are not intended to limit the present invention.

According to the utility model discloses an embodiment, this circuit still includes the connecting piece, first fixed plate with the second fixed plate passes through the connecting piece is fixed with the superconducting magnet.

For example, the connecting element may be a screw, and screw holes adapted to the screws are provided on the first fixing plate and the second fixing plate, and the screws pass through the screw holes to be connected with the side wall of the superconducting magnet.

Therefore, the fixation of the quench protection circuit and the superconducting magnet can be realized.

According to the utility model relates to an embodiment, fixed bolster 2 is the B-shaped structure.

By adopting the structure of the shape of the Chinese character 'yi', the occupied space of the quench protection circuit can be effectively reduced, the space is reserved for the installation of the columnar diode, meanwhile, the space is also reserved for other cables needing to be connected, and the installation space is saved to the maximum extent.

The embodiment of the utility model provides a superconducting magnet is still provided, wherein, including superconducting coil and above-mentioned embodiment quench protection circuit.

Thus, with the quench protection circuit in the above embodiment, quench protection can be provided for the superconducting magnet.

As can be seen from the above embodiments, the quench protection circuit according to the embodiment of the present invention has at least the following advantages:

1. the fixing support is utilized to play a role in electrically connecting the diodes, and can also play a role in fixing the diodes, so that the number of connecting wires is reduced, and the electrical connection is simplified;

2. the fixed support adopts a Z-shaped structure, so that the occupied space of the quench protection circuit can be effectively reduced, a space is reserved for mounting the columnar diode, a space is also reserved for a connected cable, and the mounting space is saved to the maximum extent.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A quench protection circuit of a superconducting magnet is characterized by comprising a forward diode (1), a fixed bracket (2), a backward diode (3), a first lead (4), a second lead (5) and a third lead (6), the fixed bracket (2) is made of conductive metal, one side of the fixed bracket (2) is provided with a first bracket groove and a first fixed plate, the other side is provided with a second bracket groove and a second fixed plate, the first fixing plate and the second fixing plate are used for fixing with a superconducting magnet, the forward diode (1) is arranged in the first bracket groove, and the positive pole of the forward diode (1) is positioned outside the first bracket groove and the negative pole is positioned in the first bracket groove, the backward diode (3) is arranged in the second bracket groove, and the anode of the backward diode (3) is positioned in the second bracket groove and the cathode is positioned outside the second bracket groove, one end of the first lead (4) is connected to one end of a superconducting coil (7) of the superconducting magnet and the other end is connected to the second fixing plate, one end of the second lead (5) is connected with the anode of the forward diode (1) and the other end is connected with the cathode of the backward diode (3), one end of the third lead (6) is connected with the anode of the forward diode (1) and the other end is connected with the other end of the superconducting coil (7).

2. The quench protection circuit of a superconducting magnet according to claim 1, wherein the size of the forward diode (1) matches the size of the first standoff recess, and the size of the reverse diode (3) matches the size of the second standoff recess.

3. The quench protection circuit of a superconducting magnet according to claim 2, wherein the forward diode (1) and the backward diode (3) are cylindrical diodes, the first and second holder grooves are cylindrical grooves, and one end of the cylindrical diode is a positive electrode and the other end of the cylindrical diode is a negative electrode.

4. The quench protection circuit for a superconducting magnet according to claim 3, wherein the cylindrical diode has an external thread, the cylindrical groove has an internal thread, and the cylindrical diode and the cylindrical groove are connected by the external thread and the internal thread.

5. The quench protection circuit of a superconducting magnet according to any of claims 1-4, wherein the stationary support (2) further comprises fasteners for fastening the forward diode (1) and the reverse diode (3).

6. The quench protection circuit of a superconducting magnet of claim 5, wherein the fastener is a fastening screw.

7. The quench protection circuit of a superconducting magnet of claim 6, further comprising a connector by which the first and second fixed plates are fixed with the superconducting magnet.

8. A superconducting magnet comprising a superconducting coil and the quench protection circuit of any of claims 1-7.