KR101597685B1 - Co-Winding Machine for Pancake Coils and Co-Winding Method - Google Patents

Abstract

According to a preferred embodiment of the present invention for winding a high-temperature superconducting wire on a bobbin with a tensile strength significantly higher than a tensile strength of a high-temperature unsupervised wire, A pancake coil coiler winding apparatus using a taping wire having a relatively high tensile strength in a high-temperature superconducting wire wound around a pancake bobbin, the apparatus comprising: a base frame installed horizontally with the ground; Wherein either one of the first cassette in which the high-temperature superconducting wire is wound or the second cassette in which the taping wire is wound is detachably mounted on one side of the base frame, A first winding part for supplying the first winding part; Wherein the first cassette or the second cassette is detachably mounted on the other side of the base frame so as to be spaced apart from the first winding unit by a predetermined distance, 2 release; And a high-temperature superconducting wire and a taping wire, which are disposed between the first winding part and the second winding part, wherein the pancake bobbin is detachably mounted and supplied from the first winding part and the second winding part, And a coaxial winding portion which is rotated so as to be wound.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pancake coil coiling machine and a double pancake coil coiling method using the same,

The present invention relates to a pancake coil coil winding apparatus and a double pancake coil coil winding method using the same, and more particularly, to a pancake coil coil winding apparatus for winding a high-temperature superconducting wire with a strong tension so that a coil can be structurally and firmly fixed And a double pancake coil bobbin winding method using the same.

Since the discovery of the superconducting phenomenon, efforts to apply superconducting technology to the electric power field have been continuing to the present day, including developed countries, and high temperature superconductivity (HTS) has been found in the conventional cryogenic cooling method using liquid helium And the cooling method using the refrigerator is adopted, thereby making it possible to remarkably reduce the volume and the maintenance cost of the refrigerator part. The materials of high-temperature superconducting conductors used in superconducting power devices are made of brittle metal oxide ceramics, and they are made of tape-shaped joists with metal cladding and are wound in the shape of a duffle pancake coil. The double pancake coil may have various shapes such as a circular shape or a race track shape depending on the purpose of use.

In the double pancake coil, the superconducting wires are wound in opposite directions to each other in the first and second layers. In the double pancake coil, if necessary, the first and second layer winding belts are formed into a cylindrical shape or a race track shape. The double pancake coil may be directly wound on the double pancake bobbin, or may be wound on a predetermined winding frame, and then the double pancake coil may be separated and laminated on the bobbin. In this case, it is important to minimize damage to the superconducting wire.

As superconducting wires are subjected to electrical and mechanical influences in tensile stress, bending stress, and stress direction, if superconducting wire is not wound uniformly due to the flow or movement of the bobbin during winding, the superconducting properties are degraded or unstable do. Therefore, it is very important to uniformly wind the superconducting wire while minimizing damage of the wire during winding.

Thus, the present applicant has proposed a superconducting wire winding apparatus and a winding method as disclosed in Korean Patent Registration No. 10-0775986 as a prior art.

The superconducting wire winding apparatus includes a winding portion coupled to a fixed frame, two winding feed portions provided on both sides of the winding portion, and a winding guide portion corresponding to the winding portion, wherein the double pancake bobbin constituting the winding portion is fixed, And the superconducting wire is continuously and rapidly wound on the first-layer winding wire and the second-layer winding wire of the double pancake bobbin in a sequential manner.

On the other hand, when a current is applied to the superconducting coil, an electromagnetic force is generated, and the coil moves by the electromagnetic force. Such movement of the coil leads to local heat generation and causes quench, which degrades the characteristics of the superconducting coil.

For this reason, there is a demand for a coil bobbin having a structure in which a superconducting coil can be mechanically and firmly fixed.

However, the high-temperature superconducting wire has a structure in which the wire material is layered by a ceramic or a thin film and has a very weak tensile strength. Therefore, the conventional wire harness has a problem that it is difficult to wind the wire with a strong tension.

In particular, when the double pancake coil is wound, the direction of winding is reversed. Therefore, the fixing direction of the bobbin fixed to the winding portion must be changed. In this case, there is a problem that the high temperature superconducting wire may be damaged.

SUMMARY OF THE INVENTION An object of the present invention to solve the problems derived from the prior art is to provide a pancake coil coil winding apparatus capable of winding the high-temperature superconducting wire on a bobbin with a tensile strength significantly higher than that of high- A double pancake coil co-winding method.

The above object is achieved by a pancake coil coil winding apparatus using a taping wire having a relatively larger tensile strength than that of the high-temperature superconducting wire in winding the high-temperature superconducting wire on the pancake bobbin according to the embodiment of the present invention, A base frame installed to be installed; Wherein either one of the first cassette in which the high-temperature superconducting wire is wound or the second cassette in which the taping wire is wound is detachably mounted on one side of the base frame, A first winding part for supplying the first winding part; Wherein the first cassette or the second cassette is detachably mounted on the other side of the base frame so as to be spaced apart from the first winding unit by a predetermined distance, 2 release; And a high-temperature superconducting wire and a taping wire, which are disposed between the first winding part and the second winding part, wherein the pancake bobbin is detachably mounted and supplied from the first winding part and the second winding part, And a coaxial winding portion which is rotated so as to be wound on the pancake coil winding device.

Preferably, the first winding portion and the second winding portion are independently controlled so that the high-temperature superconducting wire and the taping wire are supplied with different tensile forces, and a tension applied to the taping wire is greater than a tension applied to the high- .

Preferably, the cavity winding portion rotates the pancake bobbin such that the taping wire surrounds the high-temperature superconducting wire and is co-wound.

Preferably, a first winding guide portion is disposed between the first winding portion and the cavity winding portion and supports and guides any one of the high-temperature superconducting wire or the taping wire, And a second winding guide portion disposed between the winding portions to support and guide the other of the high-temperature superconducting tape or the taping wire.

Preferably, the first winding guide portion and the second winding guide portion include an odd number of guide rollers having at least three or more guide rollers, and a guide roller positioned at the most center among the guide rollers is formed on the uppermost side, And is connected to a load cell.

Preferably, the apparatus further includes an auxiliary guide portion disposed on both sides of the first winding guide portion and the second winding guide portion, for supporting and guiding the high temperature superconducting tape and the taping wire.

In the meantime, the present invention is a method for co-winding a high-temperature superconducting wire and a taping wire on a double pancake bobbin composed of a single-layer winding wire and a two-layer winding wire by using the pancake coil winding wire winding apparatus according to the above- A first step of mounting a first cassette on which the high temperature superconducting wire is wound and a second cassette on which the taping wire is wound to the second winding part; A second step of fixing the high-temperature superconducting wire and the taping wire to a single-layer winding cage of the double pancake bobbin; A third step of co-winding the taping wire with the one-layer winding wire so as to wrap the high-temperature superconducting wire; A fourth step of disconnecting the high-temperature superconducting wire and the taping wire when the coil winding of the first layer winding wire is completed, and fixing the coil with the tension maintained; After the first cassette and the second cassette are detached, the second cassette is mounted on the first winding part, the first cassette is mounted on the second winding part, and the high temperature superconducting tape and the taping wire are wound A fifth step of switching the position; A sixth step of fixing the high-temperature superconducting wire and the taping wire to a two-layer winding cage of the double pancake bobbin; A seventh step of jointly winding the taping wire around the two-layer winding wire so as to surround the high-temperature superconducting wire; And an eighth step of disconnecting the high-temperature superconducting wire and the taping wire when the coil winding is completed on the second-layer winding wire, and fixing the coil in a state where the tension is maintained. ≪ / RTI >

Preferably, the second step and the sixth step further include adjusting the tension so that the tension applied to the taping wire is greater than the tension applied to the high-temperature superconducting wire.

According to the present invention, the taping wire having a significantly higher tensile strength than the high-temperature superconducting wire can be co-wound so as to wrap the high-temperature superconducting wire with strong winding tension. It is possible to prevent the deterioration of the characteristics of the superconducting coil due to the quenching phenomenon due to the electromagnetic force.

Further, since the double pancake coil can be wound without changing the fixing direction of the double pancake bobbin, damage to the high temperature superconducting wire can be prevented.

1 is a front view showing a main part of a pancake coil bobbin winding apparatus according to an embodiment of the present invention,
FIG. 2 and FIG. 3 are schematic operation principle diagrams for explaining a double winding method of a double pancake coil using the coaxial winding apparatus of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Brief Description of Drawings FIG. 1 is a block diagram of a computer system according to an embodiment of the present invention; FIG. 2 is a block diagram of a computer system according to an embodiment of the present invention; FIG.

The pancake coil winding apparatus according to an embodiment of the present invention is based on the assumption that a taping wire having a relatively larger tensile strength than the high-temperature superconducting wire is used for winding the high-temperature superconducting wire on the pancake bobbin.

1, the pancake coil winding machine according to the present invention comprises a base frame installed horizontally with the ground, a first winding part 200 disposed on one side of the base frame, A second winding part 400 disposed on the other side of the base frame so as to be spaced apart from the winding part 200 by a predetermined distance and a second winding part 400 disposed between the first winding part 200 and the second winding part 400, (600).

The first winding part 200, the second winding part 400, and the bobbin winding part 600 may be installed on a vertical frame which is coupled with the base frame to be long in the vertical direction, And the second winding guide portion 900 and the auxiliary guide 800 may be installed on the vertical frame.

The first winding part 200 is detachably mounted on either the first cassette 100 wound with the HTS wire 120 or the second cassette 300 wound with the taping wire 320, Either the superconducting wire 120 or the taping wire 320 is supplied. The first winding unit 200 is coupled to the rotating shaft of the servo motor so as to rotate the first cassette 100 or the second cassette 300 so as to correspond to the winding direction.

The second winding unit 400 is detachably mounted to the first cassette 100 or the second cassette 300 to supply a wire material different from the first winding unit 200. That is, if the first cassette 100 providing the high-temperature superconducting wire 120 is mounted on the first winding part 200, the second cassette 300 is mounted on the second winding part 400, (320).

The first winding part 200 and the second winding part 400 are independently controlled so that the high temperature superconducting tape 120 and the taping tape 320 are supplied with different tensile forces, The tension applied to the taping wire 320 is controlled to be greater than the tension applied to the taping wire 320. [

The coaxial winding part 600 is formed with a rotating shaft on which the pancake bobbin 500 is attached and detached and the high temperature superconducting wire 120 and the taping wire 320 supplied from the first winding part 200 and the second winding part 400 Is co-wound on the pancake bobbin (500). At this time, the coaxial winding part 600 rotates the pancake bobbin 500 such that the taping wire 320 surrounds the high-temperature superconducting wire 120 and is co-wound.

Here, the pancake bobbin 500 includes a bobbin or a winding frame in which the high-temperature superconducting wire 120 is wound directly. The pancake bobbin 500 is interlocked with the rotation axis of the servo motor so that the pancake bobbin 500 is rotated in a specific direction and at a speed according to the operation of the servo motor so that the wire material supplied from the first winding part 200 and the second winding part 400 It will automatically rewind.

The first winding guide part (110) is disposed between the first winding part (200) and the cavity winding part (600) and supports and guides any one of the high temperature superconducting tape (120) And a second wire (600) disposed between the second winding part (400) and the bobbin winding part (600) and supporting and guiding another wire of the high temperature superconducting wire (120) or the taping wire And may further include a winding guide unit 900.

The first winding guide portion 700 and the second winding guide portion 900 may include an odd number of guide rollers of at least three or more. In this embodiment, three guide rollers are provided for minimizing damage to the HTS wire 120 by pre-bending the wire in a direction corresponding to the bending direction when the wire is wound on the pancake bobbin 500 Preferably, the high-temperature superconducting strips 120 are bent so as to be convex upward, so that the center points of the three guide rollers are connected to form a triangular shape.

A guide roller positioned at the center of the guide rollers may be formed on the uppermost side of the guide rollers so as to be connected to a load cell for tension measurement and a speed measuring module Can be connected.

The load cell measures the tension applied to the wire rod supported and guided by the first and second wire guide units 700 and 900 in real time. When a tension higher or lower than the tension set by the control unit (not shown) The control unit controls the rotation speed and the rotation direction of the servo motor interlocked with the rotation axis of the first and second winding units 200 and 400 and the bobbin winding unit 600 according to a predetermined algorithm.

The speed measuring module is provided with an encoder for measuring the rotation speed of the guide roller, and measures the rotation speed with time to measure the feed speed of the wire. This is performed by the control unit to supply the wire rod at a constant speed.

On both sides of the first winding guide portion 700 and the second winding guide portion 900 are provided auxiliary guide portions 800 for supporting and guiding the high temperature superconducting wire 120 and the taping wire 320, Can be disposed. The auxiliary guide unit 800 is disposed between the first and second winding units 200 and 400 and between the first and second coil guide units 700 and 900 and between the coil winding unit 600 and the first and second coil guide units 700 and 900 It prevents the wire from sagging in the space and plays a role of supporting and guiding it so that the set tension can be accurately taken.

According to the shape and size of the pancake bobbin 500 mounted on the bobbin winding part 600 and the specification of the coil, the first and second winding parts 200 and 400, The first and second winding guide units 700 and 900, and the auxiliary guide unit 800 may be configured to move back and forth, left and right, and up and down.

Hereinafter, a method for jointly winding the high-temperature superconducting wire 120 and the taping wire 320 on the double pancake bobbin 500 having the single-layer winding wire and the double-layer winding wire using the pancake coil winding wire winding apparatus according to the above- The method will be described with reference to FIG. 2 and FIG.

2, a first cassette 100 in which a high-temperature superconducting wire 120 is wound is mounted on the first winding part 200 and a taping wire 320 (not shown) is attached to the second winding part 400, The high-temperature superconducting wire 120 and the taping wire 320 are fixed to the single-layer winding cage of the double pancake bobbin 500 after the second cassette 300 is wound. At this time, the tension is adjusted so that the tension applied to the taping wire 320 is greater than the tension applied to the HTS wire 120.

Next, the coaxial winding part 600 is rotated so that the taping wire 320 surrounds the HTS wire 120, so that the coils are co-wound on the single-layer winding wire, When the winding is completed, the high-temperature superconducting wire 120 and the taping wire 320 are disconnected, and the outermost end of the taping wire 320 is soldered to the coil or the bobbin so that the coil is fixed while maintaining the tension.

3, after the first cassette 100 and the second cassette 300 are detached, the second cassette 300 is mounted on the first winding unit 200, The first cassette 100 is mounted on the second winding part 400 so that the winding position of the high temperature superconducting tape 120 and the taping wire 320 are switched. Thereafter, the high-temperature superconducting wire 120 and the taping wire 320 are fixed to the two-layer winding bobbin of the double pancake bobbin 500. At this time, the tension is adjusted so that the tension applied to the taping wire 320 is greater than the tension applied to the HTS wire 120.

Next, the coaxial winding part 600 is rotated so that the taping wire 320 surrounds the HTS wire 120, so that the coil is co-wound on the two-layer winding wire. At this time, the coaxial winding part 600 rotates in the direction opposite to that when the coils are co-wound on the single-layer winding wire. When the coil winding is completed, the high temperature superconducting wire 120 and the taping wire 320 are disconnected and the outermost end of the taping wire 320 is coiled so that the coil is fixed with the tension maintained. Or solder to the bobbin to complete the double pancake coil.

According to the present invention described above, taping wire having a significantly higher tensile strength than that of the high-temperature superconducting wire can be co-wound so as to wrap the high-temperature superconducting wire with strong winding tension. So that the deterioration of the characteristics of the superconducting coil due to the quenching phenomenon due to the electromagnetic force can be prevented in advance. Further, since the double pancake coil can be wound without changing the fixing direction of the double pancake bobbin, damage to the high temperature superconducting wire can be prevented.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the claims of the invention to be described below may be better understood. The embodiments described above are susceptible to various modifications and changes within the technical scope of the present invention by those skilled in the art. These various modifications and changes are also within the scope of the technical idea of the present invention, and will be included in the claims of the present invention described below.

100: first cassette 120: high temperature superconducting wire
200: Book 1 issue
300: second cassette 320: taping wire
400: Book 2
500: Pancake Bobbin
600: co-
700: first winding guide section
800: auxiliary guide portion
900: Second winding guide portion

Claims (8)

There is provided a pancake coil bobbin winding apparatus using a taping wire having a relatively high tensile strength than that of the high temperature superconducting wire in winding the high temperature superconducting wire on the pancake bobbin,
A base frame installed horizontally with the ground;
Wherein either one of the first cassette in which the high-temperature superconducting wire is wound or the second cassette in which the taping wire is wound is detachably mounted on one side of the base frame, A first winding part for supplying the first winding part;
Wherein the first cassette or the second cassette is detachably mounted on the other side of the base frame so as to be spaced apart from the first winding unit by a predetermined distance, 2 release; And
Wherein the pancake bobbin is detachably mounted and the high temperature superconducting wire and taping wire supplied from the first winding portion and the second winding portion are disposed between the first winding portion and the second winding portion, And a coaxial winding portion that rotates as much as possible,
Wherein the first winding part and the second winding part are independently controlled so that the high-temperature superconducting wire and the taping wire are supplied with different tension,
Wherein the tension applied to the taping wire material is greater than the tension applied to the high-temperature superconducting wire material. delete The method according to claim 1,
Wherein the bobbin winding unit rotates the pancake bobbin such that the taping wire surrounds the high-temperature superconducting wire and is co-wound. The method according to claim 1,
A first winding guide portion disposed between the first winding portion and the cavity winding portion and supporting and guiding any one of the high-temperature superconducting wire or the taping wire,
Further comprising a second winding guide portion disposed between the second winding portion and the cavity winding portion for supporting and guiding the other of the high-temperature superconducting wire or the taping wire. 5. The method of claim 4,
Wherein the first winding guide portion and the second winding guide portion include an odd number of guide rollers having at least three or more,
Wherein a guide roller located at the center of the guide rollers is formed on the uppermost side and connected to a load cell for measurement of tensile force. 5. The method of claim 4,
Further comprising: an auxiliary guide portion disposed on both sides of the first winding guide portion and the second winding guide portion to assist and guide the high temperature superconducting tape and the taping wire. A method for jointly winding a high-temperature superconducting wire and a taping wire on a double-pancake bobbin composed of a single-layer winding wire and a two-layer winding wire using the pancake coil bobbin winding apparatus according to any one of claims 1 to 6 As a method,
A first step of mounting a first cassette in which the high-temperature superconducting wire is wound on the first winding part, and a second cassette wound with a taping wire on the second winding part;
A second step of fixing the high-temperature superconducting wire and the taping wire to a single-layer winding cage of the double pancake bobbin;
A third step of co-winding the taping wire with the one-layer winding wire so as to wrap the high-temperature superconducting wire;
A fourth step of disconnecting the high-temperature superconducting wire and the taping wire when the coil winding of the first layer winding wire is completed, and fixing the coil with the tension maintained;
After the first cassette and the second cassette are detached, the second cassette is mounted on the first winding part, the first cassette is mounted on the second winding part, and the high temperature superconducting tape and the taping wire are wound A fifth step of switching the position;
A sixth step of fixing the high-temperature superconducting wire and the taping wire to a two-layer winding cage of the double pancake bobbin;
A seventh step of jointly winding the taping wire around the two-layer winding wire so as to surround the high-temperature superconducting wire; And
When the coil winding of the second layer winding wire is completed, disconnecting the high-temperature superconducting wire and the taping wire to fix the coil in a state where the tension is maintained;
Wherein the first and second pancake coils are coupled to each other. 8. The method of claim 7,
The second step and the sixth step may include:
And adjusting the tension so that the tension applied to the taping wire is greater than the tension applied to the high-temperature superconducting wire.

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