CN103578741B - The interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling - Google Patents
The interchanging method of a kind of two superconducting tape magnetic plugs in parallel coiling Download PDFInfo
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- CN103578741B CN103578741B CN201310533674.3A CN201310533674A CN103578741B CN 103578741 B CN103578741 B CN 103578741B CN 201310533674 A CN201310533674 A CN 201310533674A CN 103578741 B CN103578741 B CN 103578741B
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Abstract
The invention belongs to superconduction electrician application, particularly a kind of interchanging method of superconducting tape coiling magnetic plug in parallel.The number of described superconducting tape is at least two, and this interchanging method comprises the following steps: step 1: after two upper and lower overlaps of superconducting tape, and the top, axial side along coil rack is wound around; Step 2: when being wound into 1/4 position of coil rack axial height, first time transposition; Step 3: two superconducting tapes are again up and down after overlap, and the axis along coil rack continues to be wound around backward; Step 4: when being wound into 3/4 position of coil rack axial height, second time transposition; Step 5: two superconducting tapes up and down after overlap, the winding layer completed are wound around one deck insulating material more again; Step 6: judge that whether superconducting tape winding layer number is equal with set point, if not etc., repeat step 1-5, otherwise, stop being wound around.The present invention is conducive to the capacity improving superconducting coil, strengthens the stability of superconducting coil.
Description
Technical field
The invention belongs to superconduction electrician application, the interchanging method of particularly 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 the key technology that superconducting coil is applied as forceful electric power, the core component of a lot of superconducting power apparatus, such as 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 coil is connected because the single cake of needs two welds, so contact resistance is can hardly be avoided.The electric current that superconducting coil passes through is very large, and square being directly proportional of Power consumption and electric current, contact resistance will cause coil to produce larger loss.And magnetic plug inside does not need welding, do not have contact resistance, loss is less, good economy performance.
Because single strips current capacity is limited, the requirement of large-capacity power equipment can not be met, when the electric current in coil is larger, many superconducting tape coilings in parallel need be adopted.When passing into alternating current in coil, or logical direct current is when excitation and demagnetization, is easy to because magnetic coupling is uneven and produces circulation in band in parallel.In addition, if band in parallel does not replace, because residing magnetic field environment difference equally easily causes circulation.Due to the low impedance characteristic of superconducting tape, when not replacing when band parallel connection, the circulation caused by the drain potential induced in each band is quite large.In the band of parallel connection, likely cause the circulation of a part of band to make its current-carrying be negative value, the circulation in a part of band makes its current-carrying exceed critical value and quench, and some band does not almost have current-carrying.Wish that when coil runs balanced current distribution is in superconducting tape in parallel, reaches inductance balance, therefore must replace to band in parallel.
High temperature superconducting materia is oxide ceramics, and compared with common band, 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, also causes difficulty to band transposition.When coiling magnetic plug, from 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 superconductor compound coiling.Superconductor comprises high-temperature superconductor and cryogenic superconductor.Due to low temperature superconducting material low price, superconducting magnet practical is at present still based on cryogenic magnet.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 energy is little, makes traditional cryogenic magnet promptly can be changed to positive normality from superconducting 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 energy is large, makes the interference performances such as high-temperature superconducting magnet resistance to mechanical, temperature strong.Adopt high/low temperature superconducting tape compound coiling, can in conjunction with both advantages, make superconducting magnet (especially magnetic field is higher than the superconducting magnet of 10T) can run more stable than pure cryogenic magnet and high-temperature superconducting magnet, efficiency is higher, safer.
Summary of the invention
The object of the invention is the transposition problem in order to solve the parallel connection two superconducting tape magnetic plugs coiling described in background technology, and realize complete transposition, play the effect of inductance balance and current-sharing, propose 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 upper and lower overlaps of superconducting tape, the top, axial side along coil rack starts by the seamless uniform winding of set angle;
Step 2: when two superconducting tapes are wound into 1/4 position of coil rack axial height, the superconducting tape being positioned at upper strata is directly jumped to next circle winding position, the superconducting tape order being positioned at lower floor is many around a circle, be placed in the upper strata of another root superconducting tape, realize the first time transposition of two superconducting tapes;
Step 3: after two superconducting tapes complete first time transposition, two superconducting tapes are again overlapping up and down, and the axis along coil rack continues to be wound around backward;
Step 4: when being wound into 3/4 position of coil rack axial height, the superconducting tape being positioned at upper strata is directly jumped to next circle winding position, the superconducting tape being positioned at lower floor is many around a circle, is placed in the upper strata of another root superconducting tape, realizes the second time transposition of two superconducting tapes;
Step 5: after two superconducting tapes complete second time transposition, two superconducting tapes are again overlapping up and down, and the axis along coil rack is wound into opposite side top, completes the winding of a winding layer, and the winding layer completed is wound around one deck insulating material again;
Step 6: judge that whether superconducting tape winding layer number is equal with set point, if not etc., repeat step 1-5, otherwise, stop being wound around, complete a kind of two superconducting tape magnetic plugs coiling in parallel.
Described coil rack is magnetic plug.
Described two superconducting tapes are belt material of high temperature superconduct.
Described two superconducting tapes one are low-temperature superconducting band, and another root is belt material of high temperature superconduct.
Beneficial effect of the present invention: the interchanging method that the invention provides the coiling of a kind of superconducting tape magnetic plug in parallel, and can complete transposition be realized, play the effect of inductance balance and current-sharing, be conducive to the capacity improving 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 parallel connection two superconducting tape magnetic plugs coiling of the embodiment of the present invention;
A () winding layer number is for the moment, two superconducting tapes first times replace schematic diagram;
B () winding layer number is for the moment, two superconducting tapes second time replace schematic diagram;
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 being positioned at the band in outside is less than the band being positioned at inner side, namely has L
outward<L
in.
Due in superconducting tape, band resistance: R ≈ 0 when running can be thought;
Band reactance: X=ω L;
Impedance Z=R+jX ≈ j ω L that band is total;
Band electric current
The electric current being then 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, and external inductors will be caused little, electric current is large, when outside band current-carrying exceedes critical current, outside band quench will be caused even to burn, whole current transfer to inner band, then causes inner band overcurrent, and then quench is burnt.
After replacing to band, length and the residing magnetic field of band are identical, L
outward=L
in, thus make I
outward=I
in, realize the effect of current-sharing.Avoid welding by the method for transposition simultaneously, also just avoid the appearance of contact resistance, reduce loss.
Fig. 1 (a) for winding layer number be for the moment, two superconducting tapes first times replace schematic diagram, and two bands in parallel are according to the even angle winding around skeleton of setting, and before first time transposition, superconducting tape 1 is positioned at upper strata, and superconducting tape 2 is positioned at lower floor.When arriving 1/4 position of coil rack axial height, carry out first time transposition.During transposition, the superconducting tape 1 being positioned at upper strata does not continue order and is wound around, but directly jump to the position of next circle winding, superconducting tape 2 is wound around along coil rack axial order, namely be pressed in above superconducting tape 1 than superconducting tape more than 1 after a circle, then two superconducting tapes continue coiling backward, thus achieve first time transposition.Because the diameter of superconducting coil is comparatively large, a lot of compared with the different widths of superconducting tape, winding angle is very little, very little to the torsion of superconducting tape directly to the cross-over connection of next position.Superconducting tape more than 2 is when a circle, and such transposition form can avoid common transposition form to the excessive bending of superconducting tape and torsion, prevents the destruction of the mechanical property to superconducting tape, makes the magnetic plug of coiling more stable.After first time transposition, superconducting tape 2 is positioned at upper strata, and band 1 is positioned at superconducting tape lower floor.
Fig. 1 (b) winding layer number is for the moment, and two superconducting tapes second time replace schematic diagram; Before second time transposition, superconducting tape 2 is positioned at upper strata, and superconducting tape 1 is positioned at lower floor.When around to coil rack axial height 3/4 place, carry out second time transposition, interchanging method replaces identical with first time.After second time transposition, superconducting tape 1 is positioned at upper strata, 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; 1/4 part and rear 1/4 part before 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, two superconducting tapes are all many around a circle, and the inductance of superconducting tape in parallel used is basically identical, and circulation is very little.
The present invention is many around a circle by the superconducting tape that will be positioned at lower floor, be placed in upper strata, thus reach the object of transposition, thus solve the problem utilizing conventional direct interchanging method cannot realize superconducting tape transposition, and realize complete transposition, reach the effect of inductance balance and current-sharing, be conducive to the capacity improving superconducting coil, strengthen the stability of superconducting coil.
Claims (4)
1. an interchanging method for parallel connection two superconducting tape magnetic plugs coiling, is characterized in that, this interchanging method comprises the following steps:
Step 1: after two upper and lower overlaps of superconducting tape, the top, axial side along coil rack starts by the seamless uniform winding of set angle;
Step 2: when two superconducting tapes are wound into 1/4 position of coil rack axial height, the superconducting tape being positioned at upper strata is directly jumped to next circle winding position, the superconducting tape order being positioned at lower floor is many around a circle, be placed in the upper strata of another root superconducting tape, realize the first time transposition of two superconducting tapes;
Step 3: after two superconducting tapes complete first time transposition, two superconducting tapes are again overlapping up and down, and the axis along coil rack continues to be wound around;
Step 4: when being wound into 3/4 position of coil rack axial height, the superconducting tape being positioned at upper strata is directly jumped to next circle winding position, the superconducting tape being positioned at lower floor is many around a circle, is placed in the upper strata of another root superconducting tape, realizes the second time transposition of two superconducting tapes;
Step 5: after two superconducting tapes complete second time transposition, two superconducting tapes are again overlapping up and down, and the axis along coil rack is wound into opposite side top, completes the winding of a winding layer, and the winding layer completed is wound around one deck insulating material again;
Step 6: judge that whether superconducting tape winding layer number is equal with set point, if not etc., repeat step 1-5, otherwise, stop being wound around, complete a kind of two superconducting tape magnetic plugs coiling 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 skeleton.
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, described two superconducting tapes one are low-temperature superconducting band, and another root is belt material of high temperature superconduct.
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| 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 |
| CN109585117B (en) * | 2018-11-20 | 2021-01-05 | 新奥科技发展有限公司 | Superconducting coil device with supporting structure |
| 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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