CN1555102A - Breaker of super conductive technology and its preparing method - Google Patents
Breaker of super conductive technology and its preparing method Download PDFInfo
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- CN1555102A CN1555102A CNA2003101191883A CN200310119188A CN1555102A CN 1555102 A CN1555102 A CN 1555102A CN A2003101191883 A CNA2003101191883 A CN A2003101191883A CN 200310119188 A CN200310119188 A CN 200310119188A CN 1555102 A CN1555102 A CN 1555102A
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- superconduction
- circuit breaker
- disjunction
- bandlet
- interval
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000002887 superconductor Substances 0.000 claims description 18
- 229910001006 Constantan Inorganic materials 0.000 claims description 15
- 238000010586 diagram Methods 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000002966 varnish Substances 0.000 claims description 7
- 239000004922 lacquer Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 4
- 238000002788 crimping Methods 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims 3
- 239000002184 metal Substances 0.000 claims 3
- 238000001035 drying Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 238000005057 refrigeration Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002595 magnetic resonance imaging Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Abstract
This invention relates to a breaker of superconduction technology and its preparing method including a heater of section gap and Eureka ban winded by Bi2223 super conduction bandelet material set and a cooling part tightly crimped on the side plane of section gap heater disk wining.This invention applies a way of winding two wires at the same time. Along with the heating to the super conduction bandelet by a heater and the cooling couple to the bandelet set winded unit by a cooling head via copper cooling part, the section gap temperature transfers quickly between 120-150deg K and 20-40deg K further to make the bandelet set at a resistance state and a super conduction state to realize on/off of the breaker.
Description
Technical field
The present invention relates to circuit breaker of a kind of superconductor technology and preparation method thereof, belong to the application of superconductor technology, particularly belong to the superconductor with thin ribbon shaped, manufacture the elimination influence of magnetic field, can reliable and stablely move, the technology of the circuit breaker of practicability.
Background technology
Along with the practicability of superconductor, it has obtained increasing application in high-intensity magnetic field generation field.Superconducting magnet need be moved under the continuous current pattern in a lot of fields such as magnetic resonance imaging, magnet energy storage, and the superconduction circuit breaker is the necessary condition of this pattern operation with closed ring.When magnet rises the field superconduction circuit breaker being disconnected, is the magnet charging with external power.Just can closed superconduction circuit breaker after charging current reaches rated value.Even remove the power supply magnet so also can go down in long-time running.
Open or closed several different methods in order to make the superconduction circuit breaker, character according to superconductor, have only when the residing temperature of superconductor and magnetic field to be lower than certain level, and the electric current of the superconductor of flowing through when also being lower than certain density electric current could flow through superconductor unimpededly.These three conditions are called as the critical temperature of superconductor respectively, critical magnetic field and critical current, and three critical condition interacts and very big difference is arranged because of superconductor is different.As long as destroy wherein a kind of condition, superconductor just enters Resistance states, thereby reaches the purpose of disjunction superconduction circuit breaker.In the specification of U.S. Patent application US 5805036A, just used the magnetic breaking technology, when the needs breaking circuit breaker with a magnet near superconductor, it is under the environment that is higher than its critical magnetic field, thereby makes the superconductor quench, reached the purpose of breaking circuit breaker.And in the specification of Chinese patent application 0310570.0, just used the double technique of magnetic field and heating.
There are the following problems for above technology:
1, for belt material of high temperature superconduct commonly used now, the critical magnetic field under its practical temperature (20 °～40 ° K) is higher, and difficulty is used for circuit breaker control.Under the situation of not pursuing the circuit breaker responsiveness, just at first consider the way of heating, and heating helps to improve that dividing has no progeny cut-offs resistance, strengthen the circuit breaker performance.
2, because the rated current of superconduction circuit breaker is all very big, design improperly can make it have bigger magnetic, superconducting line can produce the disadvantageous internal stress of material under the effect of Lorentz force on the one hand, and the magnetic field of its generation also has influence to equipment on every side on the other hand.
Summary of the invention
The present invention proposes a kind of superconduction circuit breaker that addresses the above problem and preparation method thereof, it is to be made of disjunction interval 1, calandria 4 and 5 three major parts of cooling-part, and detailed structure as shown in Figure 1.Detailed structure and preparation method are as follows:
1, uses the Bi2223 (Bi that produces by powder-in-tube technique
2Sr
2Ca
2Cu
3O
x) multi-core superconducting bandlet material 4 is as the disjunction of circuit breaker at interval 1, its substrate mostly is silver or silver alloy.Superconduction bandlet 4 section structures as shown in Figure 2,4a is superconducting core wherein, 4b is silver or silver alloy substrate.
2, select the calandria of constantan strip 3 for use as circuit breaker, it and superconduction bandlet 4 are clinged and insulate with insulating varnish, tightly be bonded at the outside at the disjunction interval 1 of superconduction bandlet 4 compositions, according to different refrigeration condition design alternatives the heating power of constantan band 3, the temperature of circuit breaker can be controlled at 150 °～200 ° K.
3, the disjunction that is wound in circuit breaker as shown in Figure 3 at interval, its outstanding characteristics are that the superconduction bandlet is that one or the winding number superconduction bandlet that twines side by side consist of the one thing, there is not joint in the winding process, the interlude of superconduction bandlet is placed on the innermost layer of winding around, be Diagram of the Supreme Ultimate shape, the superconduction bandlet all is the circular arc of certain radius (its radius is greater than 20mm) in winding process.Internal layer Diagram of the Supreme Ultimate shape is the skeleton of being made by two glass-reinforced plastic materials that constitutes Diagram of the Supreme Ultimate shape 2 as shown in Figure 3, designs 4 groups of disjunctions intervals 1 that constitute of superconduction bandlet of different length according to the circuit breaker performance requirement.Its length L=R
0The resistance value of 1cm superconduction bandlet group when/R (cm), R are 150 ° of K, R
0Be the minimum resistance of having no progeny according to circuit breaker performance requirement branch.By shown in Figure 3, after adhering to constantan band 3, superconduction bandlet 4 outsides are wound in disc afterwards.
4, at each superconduction bandlet 4, constantan strip 3 both sides all apply low temperature resistant insulation resin lacquer, will apply the prestressing force of 1N～5N in winding process to the composite strip of superconduction bandlet group 4 and constantan strip 3 formations, it is taken up form fastening disc.Twine the back and seal up low temperature resistant insulation resin lacquer at its cylindrical, constitute the thin insulating enamelled coating 5 about 2mm, the disjunction that has constituted circuit breaker at interval 1 and the disk of calandria 3 planar side of twining body coat 1mm left and right sides thin insulating enamelled coating 5, and compress by hold-down bolt 6 with copper cooling-part 7, as shown in Figure 5.Make disk twine body and realize the overall thermal coupling by the cooling-part 7 and the refrigeration machine cold head that compress.
5, the disjunction of circuit breaker interval 1 need be with insulating varnish oven dry, curing under 200 ℃～400 ℃ after finishing with calandria 3 windings.
When refrigeration machine is worked, circuit breaker disjunction interval 1 integral body is cooled to 20 °～40 ° K; Superconduction this moment bandlet group 4 has good current capacity, as with a superconduction bandlet critical current greater than 100A, can twine superconduction bandlet group side by side with several during as the circuit breaker of the bigger rated current of needs, they are connected in parallel, its electric current that passes through can reach more than the 1000A.Because circuit breaker disjunction of the present invention 1 is twined by Taiji-diagram by the jointless one superconduction in centre bandlet group 4 innermost layers at interval.Onesize electric current flows in the other direction in adjacent conductor, and the magnetic field that electric current produces is offset, and has realized noninductive coiling, add outside constantan band 3 be no magnetic just reduced the magnetic problem of superconduction circuit breaker.Simultaneously tightly sticking and be integral heater around together constantan strip 3 in superconduction bandlet group 4 adjacent lateral side, the 1 whole heating of circuit breaker disjunction interval is rapidly heated when it send electricity, superconduction bandlet group 4 temperature are risen to rapidly more than the critical temperature, make superconduction bandlet group 4 enter Resistance states, implement disjunction.This whole heating, the structure of whole cooling can make the response time of circuit breaker action very short, move flexible relatively.
The present invention just can finish the coiling of whole circuit breaker with a band, and this has guaranteed under the circuit breaker closure state it is complete superconduction.Circuit breaker inside does not have joint, and the rated current that has also guaranteed circuit breaker is as far as possible near the critical current of superconduction band itself, and can not be subjected to the influence of internal connection.
In order to control opening and closing of superconduction circuit breaker, the present invention has used heating superconduction band to make its temperature be higher than critical temperature, makes superconduction bandlet group 4 enter the method for Resistance states.Calandria is selected constantan strip 3 for use, with superconduction bandlet group 4 and around, carry out integral body heating.This method has guaranteed the speed of circuit breaker disjunction.
In order to make circuit breaker not have magnetic as far as possible, the present invention has adopted the two-wire of Taiji-diagram and around mode.Calandria reduces the electric current loop area as far as possible around the superconduction two-wire outside.Last circuit breaker solidifies with low temperature resistant insulation resin, and the superconduction band 4 and the thermal coupling of calandria 3 must be tried one's best.The superconduction circuit breaker can stop to heat the back circuit breaker and can recover superconducting state as early as possible by refrigeration machine conduction coupling.
In sum, by rational design, when the present invention reaches big as far as possible rated current and fast as far as possible responsiveness, also realized the no magnetic design of superconduction circuit breaker.Have that volume is little, performance good, no magnetic and solid and reliable characteristics.
Description of drawings
Fig. 1 is the structure diagram of superconduction circuit breaker of the present invention;
Fig. 2 is the section structure schematic diagram of superconduction bandlet material;
Fig. 3 is the coiling mode at interval of disjunction in the superconduction of the present invention;
Fig. 4 is the skeleton of Taiji-diagram;
Fig. 5 is the bind mode schematic diagram of superconduction circuit breaker and refrigeration machine.
Embodiment
The present invention by the Bi2223 superconducting tape of producing with powder-in-tube technique of Ag/Au substrate at interval as the disjunction of circuit breaker, its section structure is seen accompanying drawing 2, its section width is 4mm, thickness is 0.2mm.The Bi2223 critical temperature is at 100 ° more than the K, and this kind superconductor has good current capacity when being cooled to 20 °～40 ° K by refrigeration machine, and single band critical current is greater than 100A, can be with the many methods that band is in parallel as the circuit breaker of the bigger rated current of need.
The circuit breaker skeleton profile of Taiji-diagram as shown in Figure 3.This skeleton is made of two identical firm parts of glass of profile.The outside diameter of this skeleton is 8cm, and interior circular diameter is 4cm, and thickness is that 0.4cm is identical with Bi2223 superconducting tape section width.In the middle of lumping together and just constituted, two skeletons have the Diagram of the Supreme Ultimate shape superconduction band in space just to pass behind this slit and on this skeleton.
According to length and the bar number of the requirement of superconduction circuit breaker nominal working conditions being selected the superconduction band.Can record the critical current Ic of superconduction band under the 40K with four leads method.If the rated current that the superconduction circuit breaker requires is just chosen many superconduction bands greater than the critical current of single superconduction band, the summation that makes its critical current is greater than the desired rated current of superconduction circuit breaker.Also can record the resistance R of the long superconduction band of 1cm with four leads method, require to divide the minimum resistance R of having no progeny according to circuit breaker at 150 ° of K
0Just can calculate needs the superconduction band to get length L=R
0/ R (cm).Resistor satisfied requirement after when many superconduction bands of needs are in parallel, will guaranteeing the parallel connection of superconduction band.For example, be used in the superconduction circuit breaker on the high-temperature superconductor magnetic resonance magnet, require rated operational current at 50A between the 100A.Therefore it is just passable to use single superconduction band to make the superconduction circuit breaker.According to concrete magnet design, requiring the circuit breaker branch to have no progeny minimum resistance may be different, but substantially all zero point several to several ohm between.If get 1 ohm, should be tens meters according to recording the length that the resistance R of the long superconduction band of 1cm at 150 ° of K calculate needs superconduction band.Length should be decided according to concrete measurement result accurately.Again for example, be used in the rated current that superconduction circuit breaker on the magnet of a certain laboratory requires 1000A.At this moment just should select the parallel connection of 10 left and right sides superconduction bands for use.And the length of all superconduction bands should all equal L=R
0/ R (cm).Wherein R should be the resistance that 1cm grows under 150 ° of K after all superconduction band parallel connections.
The selection of heating tape.For making the superconduction circuit breaker not show magnetic, the present invention selects the calandria of non-magnetic constantan strip as circuit breaker for use.Its section width and superconduction band section width are all 4mm.Its section thickness is chosen as 0.1mm.
The insulation processing of heating tape and superconduction band.All be coated with insulating varnish 0.01mm in each band both sides.Oven dry between 200 ℃～400 ℃.Each band must not adhesion before the oven dry.
The coiling of superconduction circuit breaker.With the therebetween of all superconduction bands and heating tape in the circuit breaker skeleton (as Fig. 4) of Taiji-diagram, fixedly behind the circuit breaker skeleton with superconduction band and heating tape and on the circuit breaker skeleton.Should guarantee that the heating tape in the superconduction band outside as shown in Figure 3.Being coated with low temperature resistant insulation resin in the outside of each band in the winding process coats with lacquer.In the winding process each band is applied the prestressing force of 1N to 5N.Any position of superconduction band definitely can not bending be arrived below the radius 2cm in the winding process.
After disjunction interval and the calandria system of twining are finished, oven dry between 200 ℃～400 ℃.The above conduct reinforcement of insulating varnish 2mm of low temperature resistant resin is sealed up in the circuit breaker cylindrical outside afterwards.Polish be coated with more than the insulating varnish 1mm of low temperature resistant resin in a side after circuit breaker.This face closely contacts with the refrigeration machine cold head in the future, as the thermal coupling structure.Adopt bolt crimping mode the disc disjunction at interval and calandria winding body and the cooling-part formed press be connected together (as Fig. 5), utilize the very property led of heat that copper cooling-part and disjunction spacer substrate mostly be silver-colored and silver alloy, realize thermal coupling well.
In order to make the circuit breaker disjunction, the present invention uses the constantan band that the superconduction circuit breaker is carried out the integral body heating, breaker temperature can be controlled at 150 °～200 ° K according to different refrigeration conditions by selecting heating power, guarantees that the superconduction band is in Resistance states.The superconduction circuit breaker is solidified by low temperature resistant insulation resin lacquer, and the cold head of itself and refrigeration machine is by the heat conduction good coupling.Heating stops the back superconduction circuit breaker temperature of will resuming work, and the superconduction band recovers superconducting state, and circuit breaker is closed again.
Superconduction circuit breaker of the present invention carries out noninductive coiling by the superconduction band with the Tai Ji diagram form, has solved the problem that reduces superconduction circuit breaker magnetic.Heater the superconduction band outside and superconduction band and around, reach the effect of whole heating, and guaranteed the quick acting of circuit breaker by the good whole thermal conductivity.
Claims (5)
1, circuit breaker of a kind of superconductor technology and preparation method thereof, its circuit breaker is made up of disjunction interval, calandria and three critical pieces of cooling-part; Its preparation method comprises that the disjunction of superconduction bandlet at interval and the coating of the winding of calandria, low temperature resistant insulation resin lacquer, heating, drying, and the crimping of cooling-part; It is characterized in that, jointless integrated in the middle of selecting, by the Bi2223 superconduction sheet metal band of substrate powder-in-tube technique production be circuit breaker disjunction at interval, substrate mostly is silver and silver alloy.
2,, it is characterized in that with insulating varnish it and superconduction bandlet being bonded together, and accomplishing insulation by as the constantan thin slice of calandria and as disjunction superconduction sheet metal band coiling in the lump at interval according to the said circuit breaker of claim 1.
3, at interval according to the disjunction of the said circuit breaker of claim 1, the intensity size that it is characterized in that the rated current that integrated Bi2223 superconduction sheet metal band can pass through according to the requirement to circuit breaker, it can be monolithic, also can make the multi-disc parallel connection, and twine side by side, superconductor can make circuit breaker pass through big electric current under its critical current intensity like this.
4, according to the preparation of the said circuit breaker of claim 1, the disjunction of superconduction bandlet is twined in the lump with calandria constantan strip at interval, it is characterized in that on the skeleton of fiberglass, the equity place of superconduction bandlet group being placed on the innermost layer of coil, turn to Taiji-diagram, its outside clings the constantan strip with insulating varnish, and, when heating, the constantan band energising in the superconduction bandlet group outside entered Resistance states by whole heat temperature raising with disc of superconduction bandlet group coiled; This two-wire and around mode and the calandria constantan strip that will not have magnetic around the superconduction two-wire outside, realized the no magnetic design of superconduction circuit breaker.
5, according in the preparation of the said circuit breaker of claim 1 with the cooling-part crimping, it is characterized in that the disjunction of circuit breaker is at interval applied low temperature resistant insulation resin lacquer with a side plane of calandria disc winding, and polish; With the tight crimping of copper cooling-part, realized the coupling of superconduction circuit breaker and its heat connection, whole cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101191883A CN100444420C (en) | 2003-12-23 | 2003-12-23 | Breaker of super conductive technology and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101191883A CN100444420C (en) | 2003-12-23 | 2003-12-23 | Breaker of super conductive technology and its preparing method |
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| Publication Number | Publication Date |
|---|---|
| CN1555102A true CN1555102A (en) | 2004-12-15 |
| CN100444420C CN100444420C (en) | 2008-12-17 |
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100477027C (en) * | 2005-12-15 | 2009-04-08 | 中国科学院电工研究所 | Current lead of superconductive magnet |
| CN102592774A (en) * | 2012-03-06 | 2012-07-18 | 中国科学院电工研究所 | Spacing layer of high-temperature super-conductivity non-inductive coil |
| CN101896833B (en) * | 2007-12-11 | 2013-05-29 | 皇家飞利浦电子股份有限公司 | Magnetic resonance system with cooling system and monitoring of helium pressure |
| CN103219458A (en) * | 2012-01-19 | 2013-07-24 | 上海联影医疗科技有限公司 | Superconductive breaker |
| CN111668012A (en) * | 2020-05-26 | 2020-09-15 | 东部超导科技（苏州）有限公司 | Automatic device for winding non-inductive coil and winding method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4963852A (en) * | 1989-03-15 | 1990-10-16 | The United States Of America As Represented By The Secretary Of The Air Force | Superconductor switch |
-
2003
- 2003-12-23 CN CNB2003101191883A patent/CN100444420C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100477027C (en) * | 2005-12-15 | 2009-04-08 | 中国科学院电工研究所 | Current lead of superconductive magnet |
| CN101896833B (en) * | 2007-12-11 | 2013-05-29 | 皇家飞利浦电子股份有限公司 | Magnetic resonance system with cooling system and monitoring of helium pressure |
| CN103219458A (en) * | 2012-01-19 | 2013-07-24 | 上海联影医疗科技有限公司 | Superconductive breaker |
| CN102592774A (en) * | 2012-03-06 | 2012-07-18 | 中国科学院电工研究所 | Spacing layer of high-temperature super-conductivity non-inductive coil |
| CN111668012A (en) * | 2020-05-26 | 2020-09-15 | 东部超导科技（苏州）有限公司 | Automatic device for winding non-inductive coil and winding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100444420C (en) | 2008-12-17 |
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