CN103578741A - Transposition method of two parallel superconducting tapes during winding of solenoid coil - Google Patents
Transposition method of two parallel superconducting tapes during winding of solenoid coil Download PDFInfo
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- CN103578741A CN103578741A CN201310533674.3A CN201310533674A CN103578741A CN 103578741 A CN103578741 A CN 103578741A CN 201310533674 A CN201310533674 A CN 201310533674A CN 103578741 A CN103578741 A CN 103578741A
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Abstract
The invention belongs to the electrical application field of super-conduction, in particular to transposition method of two parallel superconducting tapes during winding of a solenoid coil. At least two superconducting tapes are provided. The transposition method comprises the steps as follows: step one, the two superconducting tapes are wound along the top end of one axial side of a coil framework after overlapped vertically; step two, when the two superconducting tapes are wound to one fourth of the axial height of the coil framework, first time transposition is performed; step three, the two superconducting tapes are wound backwards continuously in an axial direction of the coil framework after overlapped vertically again; step four, when the two superconducting tapes are wound to three fourths of the axial height of the coil framework, second time transposition is performed; step five, one layer of an insulating material is wound around a completed winding layer after the two superconducting tapes are overlapped vertically again; and step six, whether the number of the winding layers of the superconducting tapes is equal to a set value is judged, if not, the former five steps are repeated, and otherwise, winding is stopped. With the adoption of the transposition method, the capacity of a superconducting coil can be improved, and the stability of the superconducting coil is enhanced.
Description
Technical field
The invention belongs to superconduction electrician application, particularly the interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling.
Background technology
The application of superconduction forceful electric power aspect is a very important aspect in superconductor technology application, and superconducting coil is as the key technology of forceful electric power application, the core component of a lot of superconducting power apparatus, for example superconducting magnet, superconducting generator, cryomotor, superconducting transformer, superconductive current limiter etc.
Generally, high temperature superconductor coil has two kinds of winding methods: helix tube type coil and two disc coil.Two disc coils are due to two single cake welding series connection of needs, so contact resistance is unavoidable.The electric current that superconducting coil passes through is very large, square being directly proportional of Power consumption and electric current, and contact resistance will cause coil to produce larger loss.And magnetic plug inside does not need welding, there is no contact resistance, loss is less, good economy performance.
Because single strips current capacity is limited, can not meet the requirement of large-capacity power equipment, when electric current in coil is larger, need to adopt many superconducting tape coilings in parallel.In coil, pass into alternating current, or logical direct current is when excitation and demagnetization, is easy to produce because magnetic coupling is uneven circulation in band in parallel.In addition, if band in parallel does not replace, because magnetic field environment difference of living in equally easily causes circulation.Due to the low impedance characteristic of superconducting tape, while not replacing when band parallel connection, the caused circulation of drain potential inducing in each band is quite large.In band in parallel, likely causing the circulation of a part of band to make its current-carrying is negative value, and the circulation in a part of band makes its current-carrying surpass critical value and quench, and some band does not almost have current-carrying.When coil moves, wish that balanced current distribution, in superconducting tape in parallel, reaches inductance balance, therefore must replace to band in parallel.
High temperature superconducting materia is oxide ceramics, compares with common band, and belt material of high temperature superconduct is very crisp, mechanical properties, and excessive bending and torsion is all by every electromagnetic performance of badly damaged band.In addition, superconducting tape flakiness ratio is large, is generally greater than 20, and also to band, transposition causes difficulty.When coiling magnetic plug, technique, superconducting tape can not replace as conventional conductor, and is not well applicable to the interchanging method of superconducting tape at present.
In addition, realize superconducting tape transposition and also there is practical significance for high low-temperature superconducting bluk recombination coiling.Superconductor comprises high-temperature superconductor and cryogenic superconductor.Due to low temperature superconducting material low price, practical superconducting magnet still be take cryogenic magnet as main at present.But because cryogenic superconductor transition temperature is narrow, n value is high, operation temperature area is little, thermal conductance is high, quench propagation velocity is fast, minimum quench can be little, makes traditional cryogenic magnet can promptly from superconducting state, change normal state under the disturbances such as very little machinery, temperature.And high-temperature superconductor transition temperature is very wide, n value is low, operation temperature area is large, thermal conductance is low, quench propagation velocity is slow, minimum quench can be large, makes the interference performances such as the anti-machinery of high-temperature superconducting magnet, temperature strong.Adopt the compound coiling of high low-temperature superconducting band, can be in conjunction with both advantages, make the superconducting magnet (especially magnetic field is higher than the superconducting magnet of 10T) can be more stable than pure cryogenic magnet and high-temperature superconducting magnet operation, efficiency is higher, safer.
Summary of the invention
The object of the invention is in order to solve the transposition problem of two superconducting tape magnetic plugs of the parallel connection coiling described in background technology, and realize complete transposition, play the effect of inductance balance and current-sharing, proposed the interchanging method of a kind of superconducting tape magnetic plug in parallel coiling.
An interchanging method for two superconducting tape magnetic plugs in parallel coiling, this interchanging method comprises the following steps:
Step 1: after two superconducting tapes are upper and lower overlapping, start by the seamless uniform winding of set angle along the axial side top of coil rack;
Step 2: when two superconducting tapes are wound into 1/4 position of coil rack axial height, the superconducting tape that is positioned at upper strata is directly jumped to next circle winding position, the superconducting tape order that is positioned at lower floor is many around a circle, be placed in the upper strata of another root superconducting tape, realize the transposition for the first time of two superconducting tapes;
Step 3: two superconducting tapes complete after transposition for the first time, and two superconducting tapes are again overlapping up and down, is wound around backward along the axial continuation of coil rack;
Step 4: when being wound into 3/4 position of coil rack axial height, the superconducting tape that is positioned at upper strata is directly jumped to next circle winding position, how be positioned at the superconducting tape of lower floor around a circle, be placed in the upper strata of another root superconducting tape, realize the transposition for the second time of two superconducting tapes;
Step 5: two superconducting tapes complete after transposition for the second time, and two superconducting tapes are again overlapping up and down, along coil rack be axially wound into opposite side top, complete the winding of a winding layer, on the winding layer completing, be wound around again one deck insulating material;
Step 6: judge whether superconducting tape winding layer number equates with set point, if not etc., repeating step 1-5, otherwise, stop being wound around, complete the coiling of a kind of two superconducting tape magnetic plugs in parallel.
Described coil rack is magnetic plug.
Described two superconducting tapes are belt material of high temperature superconduct.
One of described two superconducting tape are low-temperature superconducting band, and another root is belt material of high temperature superconduct.
Beneficial effect of the present invention: the invention provides the interchanging method of a kind of superconducting tape magnetic plug in parallel coiling, and can realize complete transposition, play the effect of inductance balance and current-sharing, be conducive to improve the capacity of superconducting coil, strengthen the stability of superconducting coil.Can be applicable to superconducting coil and using superconducting coil as superconducting power apparatus such as the superconducting magnet of core component, superconducting generator, cryomotor, superconducting transformer, superconductive current limiters.
Accompanying drawing explanation
Fig. 1 is the interchanging method of two superconducting tape magnetic plugs of parallel connection coiling of the embodiment of the present invention;
(a) winding layer number is for the moment, two superconducting tapes schematic diagram that replaces for the first time;
(b) winding layer number is for the moment, two superconducting tapes schematic diagram that replaces for the second time;
(c) winding layer number is that two superconducting tapes complete schematic diagram this layer of coiling for the moment;
Fig. 2 is the magnetic plug generalized section of coiling of the present invention;
In figure, 11-superconducting tape 1,12-superconducting tape 2,13-coil rack, 21-insulating material.
Embodiment
Below in conjunction with accompanying drawing and instantiation, the invention will be further described.
When band coiling in parallel, if do not replaced, because residing magnetic field is different, the inductance that is positioned at the band in outside is less than the band that is positioned at inner side, has L
outward<L
in.
Due in superconducting tape, band resistance: R ≈ 0 in the time of can thinking operation;
Band reactance: X=ω L;
Impedance Z=R+jX ≈ j ω L that band is total;
Band electric current
The electric current that is positioned at the band in outside is greater than the band of inner side, i.e. I
outward>I
in;
Can find out, if do not replaced, band CURRENT DISTRIBUTION in parallel is uneven, will cause external inductors little, electric current is large, when outside band current-carrying surpasses critical current, will cause outside band quench even to be burnt, all current transfer arrives inner band, then causes inner band overcurrent, and then quench is burnt.
After band is replaced, the length of band and residing magnetic field are identical, L
outward=L
inthereby, make I
outward=I
in, realize the effect of current-sharing.By the method for transposition, avoid welding simultaneously, also just avoided the appearance of contact resistance, reduced loss.
Fig. 1 (a) for winding layer number be for the moment, two superconducting tapes schematic diagram that replaces for the first time, two bands in parallel are according to the even angle winding around skeleton of setting, before transposition, superconducting tape 1 is positioned at upper strata for the first time, superconducting tape 2 is positioned at lower floor.When arriving 1/4 position of coil rack axial height, replace for the first time.During transposition, the superconducting tape 1 that is positioned at upper strata does not continue order and is wound around, but directly jump to the position that next circle is wound around, superconducting tape 2 is wound around along coil rack axial order, than superconducting tape more than 1 after a circle, be pressed in superconducting tape 1 above, then two superconducting tapes continue coiling backward, thereby have realized transposition for the first time.Because the diameter of superconducting coil is larger, mutually far short of what is expected compared with the width of superconducting tape, winding angle is very little, directly very little to the torsion of superconducting tape to the cross-over connection of next position.Superconducting tape more than 2 is when a circle, and such transposition form can be avoided excessive bending and the torsion of common transposition form to superconducting tape, prevents the destruction to the mechanical property of superconducting tape, makes the magnetic plug of coiling more stable.After transposition, superconducting tape 2 is positioned at upper strata for the first time, and band 1 is positioned at superconducting tape lower floor.
Fig. 1 (b) winding layer number is for the moment, two superconducting tapes schematic diagram that replaces for the second time; Before transposition, superconducting tape 2 is positioned at upper strata for the second time, and superconducting tape 1 is positioned at lower floor.When around to coil rack axial height 3/4 place, replace for the second time, interchanging method with replace for the first time identical.After transposition, superconducting tape 1 is positioned at upper strata for the second time, and superconducting tape 2 is positioned at lower floor.
Fig. 1 (c) winding layer number is that two superconducting tapes complete schematic diagram this layer of coiling for the moment; In front 1/4 part and rear 1/4 part of the axial height of coil rack, every layer of superconducting tape 1 is all positioned at upper strata; In centre 1/2 part of the axial height of coil rack, every layer of superconducting tape 2 is positioned at upper strata.
Fig. 2 is the magnetic plug profile of coiling.In magnetic plug winding process, in order to realize transposition, how two superconducting tapes are all around a circle, and the inductance of superconducting tape in parallel used is basically identical, and circulation is very little.
The present invention is by many around a circle by the superconducting tape that is positioned at lower floor, be placed in upper strata, thereby reach the object of transposition, thereby solved, utilize conventional direct interchanging method cannot realize the problem of superconducting tape transposition, and realize complete transposition, reach the effect of inductance balance and current-sharing, be conducive to improve the capacity of superconducting coil, strengthen the stability of superconducting coil.
Claims (4)
1. an interchanging method for two superconducting tape magnetic plugs of parallel connection coiling, is characterized in that, this interchanging method comprises the following steps:
Step 1: after two superconducting tapes are upper and lower overlapping, start by the seamless uniform winding of set angle along the axial side top of coil rack;
Step 2: when two superconducting tapes are wound into 1/4 position of coil rack axial height, the superconducting tape that is positioned at upper strata is directly jumped to next circle winding position, the superconducting tape order that is positioned at lower floor is many around a circle, be placed in the upper strata of another root superconducting tape, realize the transposition for the first time of two superconducting tapes;
Step 3: two superconducting tapes complete after transposition for the first time, and two superconducting tapes are again overlapping up and down, is wound around backward along the axial continuation of coil rack;
Step 4: when being wound into 3/4 position of coil rack axial height, the superconducting tape that is positioned at upper strata is directly jumped to next circle winding position, how be positioned at the superconducting tape of lower floor around a circle, be placed in the upper strata of another root superconducting tape, realize the transposition for the second time of two superconducting tapes;
Step 5: two superconducting tapes complete after transposition for the second time, and two superconducting tapes are again overlapping up and down, along coil rack be axially wound into opposite side top, complete the winding of a winding layer, on the winding layer completing, be wound around again one deck insulating material;
Step 6: judge whether superconducting tape winding layer number equates with set point, if not etc., repeating step 1-5, otherwise, stop being wound around, complete the coiling of a kind of two superconducting tape magnetic plugs in parallel.
2. the interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling according to claim 1, is characterized in that, described coil rack is magnetic plug.
3. the interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling according to claim 1, is characterized in that, described two superconducting tapes are belt material of high temperature superconduct.
4. the interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling according to claim 1, is characterized in that, one of described two superconducting tape are low-temperature superconducting band, and another root is belt material of high temperature superconduct.
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Cited By (9)
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| CN103996528A (en) * | 2014-05-23 | 2014-08-20 | 芜湖市卓亚电气有限公司 | Manufacturing method of transformer winding |
| CN105702450A (en) * | 2016-04-22 | 2016-06-22 | 武汉振源电气股份有限公司 | Winding method for multiple radial parallel winding layer distribution transformer coils |
| CN106767953A (en) * | 2016-11-24 | 2017-05-31 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of linear variable difference transformer formula sensor and winding method |
| CN107564623A (en) * | 2017-07-27 | 2018-01-09 | 华北电力大学 | A kind of Cable-in-conduit conductor based on ReBCO isotropism Superconducting Strands |
| CN108320858A (en) * | 2018-03-07 | 2018-07-24 | 北京原力辰超导技术有限公司 | A kind of high-temperature superconductor flows cable and realizes the method flowed |
| CN108447616A (en) * | 2018-03-07 | 2018-08-24 | 北京原力辰超导技术有限公司 | A kind of winding method of high-temperature superconductive cable |
| CN109585117A (en) * | 2018-11-20 | 2019-04-05 | 新奥科技发展有限公司 | A kind of superconducting coil device with support construction |
| CN111986868A (en) * | 2020-08-17 | 2020-11-24 | 中国科学院合肥物质科学研究院 | Wound magnet based on high-temperature superconducting cable and winding method |
| CN113284666A (en) * | 2020-02-19 | 2021-08-20 | 中国科学院高能物理研究所 | Multilayer-packaged superconducting transposed cable and cabling method |
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| CN103996528A (en) * | 2014-05-23 | 2014-08-20 | 芜湖市卓亚电气有限公司 | Manufacturing method of transformer winding |
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| CN105702450B (en) * | 2016-04-22 | 2017-03-29 | 武汉振源电气股份有限公司 | A kind of winding method of the laminar distribution transformer coils of radial several paralleled conductor |
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| CN106767953A (en) * | 2016-11-24 | 2017-05-31 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of linear variable difference transformer formula sensor and winding method |
| CN107564623A (en) * | 2017-07-27 | 2018-01-09 | 华北电力大学 | A kind of Cable-in-conduit conductor based on ReBCO isotropism Superconducting Strands |
| CN108447616A (en) * | 2018-03-07 | 2018-08-24 | 北京原力辰超导技术有限公司 | A kind of winding method of high-temperature superconductive cable |
| CN108320858A (en) * | 2018-03-07 | 2018-07-24 | 北京原力辰超导技术有限公司 | A kind of high-temperature superconductor flows cable and realizes the method flowed |
| CN108320858B (en) * | 2018-03-07 | 2020-05-22 | 北京原力辰超导技术有限公司 | High-temperature superconducting current-sharing cable and method for realizing current sharing |
| CN109585117A (en) * | 2018-11-20 | 2019-04-05 | 新奥科技发展有限公司 | A kind of superconducting coil device with support construction |
| CN109585117B (en) * | 2018-11-20 | 2021-01-05 | 新奥科技发展有限公司 | Superconducting coil device with supporting structure |
| CN113284666A (en) * | 2020-02-19 | 2021-08-20 | 中国科学院高能物理研究所 | Multilayer-packaged superconducting transposed cable and cabling method |
| WO2021164379A1 (en) * | 2020-02-19 | 2021-08-26 | 中国科学院高能物理研究所 | Multilayer packaged superconducting transposed cable and cabling method |
| CN113284666B (en) * | 2020-02-19 | 2022-05-17 | 中国科学院高能物理研究所 | Multilayer-packaged superconducting transposed cable and cabling method |
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| CN111986868B (en) * | 2020-08-17 | 2022-02-11 | 中国科学院合肥物质科学研究院 | Wound magnet based on high-temperature superconducting cable and winding method |
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