CN103219458A - Superconductive breaker - Google Patents
Superconductive breaker Download PDFInfo
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- CN103219458A CN103219458A CN2012100178306A CN201210017830A CN103219458A CN 103219458 A CN103219458 A CN 103219458A CN 2012100178306 A CN2012100178306 A CN 2012100178306A CN 201210017830 A CN201210017830 A CN 201210017830A CN 103219458 A CN103219458 A CN 103219458A
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- superconduction
- circuit breaker
- breaker according
- bobbin
- superconducting wire
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Abstract
The invention provides a superconductive breaker. The superconductive breaker comprises an open-circuit gap which is provided with superconductive wire rods and a cooling part which allows the superconductive wire rods to be wound around. The superconductive wire rods of the open-circuit gap are iron-based superconductive wire rods SmFeAsO<1-x>F<x>, wherein x is 0.2-0.25. Due to the fact that the iron-based superconductive wire rods SmFeAsO<1-x>F<x> which are high in critical magnetic field and high in transformation temperature are adopted as the open-circuit gap, the superconductive breaker can stably work in the environment of an ultrahigh magnetic field which is as high as dozens of Tesla to one hundred Tesla, response time is short, and flexible on-off under the condition of a highfield can be achieved.
Description
Technical field
The present invention relates to the superconductor technology field, relate in particular to a kind of superconduction circuit breaker that can under super-high magnetic field, work.
Background technology
Progress along with science and technology, the continuous progress of second generation high temperature superconducting materia research and the continuous decline of first generation high temperature superconducting materia price, add that superconductor has that significant transmission losses is little, the superiority of high efficiency, the good cost performance of superconductive products is appeared gradually, application is expanded gradually, for example utilizes superconductor technology to transmit electric power, utilize superconducting MRI magnet that superconductor technology designs and produces etc.And in the application of superconductive products, all to use the superconduction circuit breaker.The superconduction circuit breaker is a kind of switching mode that makes superconductor enter normal state from superconducting state.The Kai Heguan of superconduction circuit breaker controls realization by any one critical condition in three critical conditions (critical temperature, critical magnetic field and critical current density) of destroying superconductor.
A kind of thermally controlled superconduction circuit breaker related to the present invention commonly used at present discloses the 1433091A patent as Chinese invention patent and discloses.This superconduction circuit breaker comprises the cold heavy parts that open circuit at interval and be located at the interval opposite end that opens circuit.Open circuit and comprise at interval wire rod and be wrapped in heater coil on the wire rod for the axle center single line with the wire rod with sheath of making as heart yearn, parcel heart yearn and by iron or steel by the superconductor magnesium diboride.Cold heavy parts are located at wire rod and are positioned at the wire ends at interval that opens circuit with superconduction ability, and are coupled on the refrigerating machine, are used to control the working temperature at interval that opens circuit, and then realize the open closed function of superconduction circuit breaker.When the temperature of the at interval work of opening circuit is positioned at the critical temperature of superconducting core material magnesium diboride when following, the superconduction circuit breaker is in superconducting state; And when the working temperature at interval that opens circuit was higher than the critical temperature of superconduction core magnesium diboride, the superconduction circuit breaker just was in normal condition.But because this superconduction circuit breaker adopts magnesium diboride as superconductor, and the upper critical field of magnesium diboride when 0K is about 13T, make this superconduction circuit breaker only can under the downfield below the 13T, carry out work, and can't be higher than operate as normal under the magnetic field of 13T.In addition, because the rated current of superconduction circuit breaker is very big, design improperly can make it have bigger magnetic, and magnesium diboride superconduction heart yearn can produce under the effect of Lorentz force the disadvantageous internal stress of superconductor is damaged the superconduction circuit breaker.
In view of the foregoing, necessaryly provide a kind of improved superconduction circuit breaker, to solve the defective that exists in the prior art.
Summary of the invention
The objective of the invention is to propose a kind of superconduction circuit breaker, can be under super-high magnetic field normal, steady operation.
To achieve these goals, the invention provides a kind of superconduction circuit breaker, it comprises the cold heavy parts that open circuit at interval and supply the described interval of opening circuit to twine with superconducting wire, and the superconducting wire at interval that opens circuit is iron-based superconducting wire SmFeAsO
1-XF
X, wherein x is 0.2-0.25.
Preferably, described opening circuit is spaced apart composite wire, and described composite wire also comprises the constantan line that is intertwined with the iron-based superconducting wire, is provided with insulating varnish between described iron-based superconducting wire and the constantan line.
Preferably, described composite wire adopt bifilar and around method be wrapped on the described cold heavy parts.
Preferably, described superconducting wire is by SmFeAsO
1-XF
XSingle superconduction core of making and the sheath that wraps up described superconduction core.
Preferably, described superconducting wire is by SmFeAsO
1-XF
XMany superconduction cores of making and the sheath that wraps up described many superconduction cores.
Preferably, described superconduction core adopts powder-in-tube technique to make, and described sheath is the tantalum pipe.
Preferably, described cold heavy parts have two disks and between two disks and with the integrated bobbin of two disks, described cold heavy parts are the setting of barbell shape.
Preferably, described cold heavy parts comprise that also a side that does not connect bobbin by disk protrudes out the cooling contact element of setting, and described cooling contact element and described disk are one-body molded.
Preferably, described opening circuit is wrapped on the bobbin at interval, and a side surface of the close bobbin of described disk and spool surface are all coated with lacquer and scribbled low-temperature resins glue.
Preferably, one of them side that connects bobbin of described two disks be provided with accommodate and fixedly composite wire fall " U " type groove.
Preferably, the symmetry axis of described " U " type groove is along the radial direction of disk, and its opening extends to the bobbin place.
A kind of superconduction circuit breaker provided by the invention adopts the iron-based superconducting material SmFeAsO with upper critical magnetic field, high transition temperature
1-XF
X(x=0.2-0.25) as opening circuit at interval, can make the superconduction circuit breaker up to tens teslas steady operation under the super-high magnetic field environment of 100 teslas, the reaction time is short, can realize that under the condition of highfield break-make is flexible.
Further, the multicore wire rod that adopts many superconduction cores to be coupled into can be realized the transmission of bigger electric current, and critical current can reach amperes up to ten thousand and even hundreds of thousands ampere.
Further, described composite wire adopt bifilar and around method be wrapped on the described cold heavy parts, make adjacent two plumes cross the current opposite in direction of superconducting wire, eliminated the mutual inductance effect between lead, under the highfield, avoided the infringement of electromagnetic stress to coil, can stable work.
Further, cold heavy parts are the barbell type, open circuit at interval by the bobbin carrying of cold heavy parts, have not only strengthened the stability of carrying but also have strengthened heat-conducting effect.
Description of drawings
Figure 1 shows that the schematic perspective view of superconduction circuit breaker of the present invention;
Fig. 2 is the schematic perspective view of the cold heavy parts of superconduction circuit breaker of the present invention;
Fig. 3 is the side structure schematic diagram of superconduction circuit breaker of the present invention;
Fig. 4 is the structural representation of a kind of iron-based superconducting wire of superconduction circuit breaker of the present invention;
Fig. 5 is the structural representation of the another kind of iron-based superconducting wire of superconduction circuit breaker of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the superconduction circuit breaker that the present invention proposes is described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only be used for conveniently, the purpose of the aid illustration embodiment of the invention lucidly.
Please refer to Fig. 1 to shown in Figure 5, superconduction circuit breaker 10 provided by the invention comprises the cold heavy parts 12 that are the setting of barbell shape and is wrapped in and opens circuit at interval 11 on the cold heavy parts 12.Cold heavy parts 12 are to be processed by C101 oxygen-free copper, it comprises two disks 121, between two disks 121 and with two disks, 121 integrated bobbins 122 and the cooling contact element 123 that protrudes out setting by the side that disk 121 is not connected bobbin 122.Described opening circuit 11 is wrapped on the described bobbin 122 at interval.One of them is provided with described two disks 121 one and falls " U " type groove 124.The symmetry axis of described " U " type groove 124 is along the radial direction of disk, and its opening extends to bobbin 122 places.
Open circuit at interval 11 be by adopt bifilar and around the composite wire 13 that is wrapped on the bobbin 122 of cold heavy parts 12 of method constitute.Composite wire 13 be by superconducting wire 131 and with superconducting wire 131 bifilar and around constantan wire rod 132 constitute, falling in " U " type groove 124 of cold heavy parts 12 accommodated and be fixed on to its part.Described superconducting wire 131 is iron-based superconducting wire SmFeAsO
1-XF
X, wherein x is 0.2-0.25.Be provided with insulating varnish (not shown) between described iron-based superconducting wire 131 and the described constantan wire rod 132, be used to make iron-based superconducting wire 131 and constantan wire rod 132 to be close to and to insulate.Two disks 121 of described cold heavy parts 12 separately near on the surface of side of bobbin 122 and bobbin 122 all lacquer scribble low-temperature resins glue (not shown), be used to make the 11 parts maintenances that contacts with cold heavy parts 12 at interval of opening circuit to insulate.
Described constantan wire rod 132 can make iron-based superconducting wire 131 working temperatures be higher than its critical temperature to iron-based superconducting wire 131 heating when having electric current to pass through, and then makes iron-based superconducting wire 131 change normal state into from superconducting state, and the superconduction circuit breaker is disconnected; When no current, the working temperature of iron-based superconducting line 131 falls after rise to not being higher than its critical temperature and recovers superconducting state from normal state, makes the superconduction closing of power circuit breaker.Described constantan wire rod 132 can not produce magnetic when having electric current to pass through, can not produce destructive stress when promptly under the highfield, working, avoiding opening circuit at interval, 11 coils that formed by the cold heavy parts 12 of composite wire 13 windings produce distortion, assurance superconduction circuit breaker 10 steady operations.
Described iron-based superconducting wire SmFeAsO
1-XF
X(x=0.2-0.25) 131 have by SmFeAsO
1-XF
X(x=0.2-0.25) single or many superconduction cores of making 1310 and wrap up this sheath 1311 single or many superconduction cores 1310.Described sheath 1311 is a thin-walled tantalum pipe.Described iron-based superconducting wire 131 has the upper critical field up to 120T near 0K, can work under the highfield that a Pentex draws in tens teslas, and then can make superconduction circuit breaker 10 operate as normal under the highfield.
Described iron-based superconducting wire SmFeAsO
1-XF
X(x=0.2-0.25) 131 adopt powder-in-tube technique to make, detailed process is as follows: in the glove box that is full of high-purity argon gas (purity 99.999%) and low steam, with simple substance As piece (purity is 99.999%) and Sm piece (purity is 99.999%), press 1: 1 proportioning of stoichiometric number, pack into then in the quartz ampoule, quartz ampoule is received the molecular pump unit, be evacuated to 1.0 * 10
-3Adopt acetylene flame sealing both ends behind the Pa, the mixture of the As piece of good seal and Sm piece is placed on the high temperature furnace annealing,, synthesized high-purity SmAs predecessor in the quartz ampoule by high-temperature calcination.In the glove box of above-mentioned condition with the SmAs and the Fe that prepare
2O
3(purity is 99.99%), FeF
2(purity is 99.99%), Fe (purity is 99.99%) powder are according to the stoichiometric number proportioning, and component is SmFeAsO
1-XF
X(x=0.2-0.25).In glove box, grind then evenly, with pack into 8 millimeters of overall diameters of powder, the tantalum pipe that wall thickness is 1 millimeter, two ends are earlier with the hydraulic press sealing, and then seal with the acetylene flame.It is 2.2 millimeters elongated wire rod that the effective coil winder of the tantalum of good seal is drawn into overall diameter, and inner superconducting core diameter is about 2mm.The preparation of many superconduction core couplings is the single SmFeAsO by the powder-in-tube technique preparation
1-XF
XThe many superconduction cores that superconducting line the is formed thin-walled tantalum pipe of packing into carries out once more that the vacuum-sintering drawing forms.
The diameter of wire rod can be regulated according to actual needs, and the wire rod that drawing is good is put into vacuum furnace, natural cooling after annealing 40 hours under 1150 ℃, and vacuum degree remains on 9.0 * 10 in the vacuum furnace
-2-1.0 * 10
-3Between.If this high field super circuit breaker is used in the condition of work of the big electric current in highfield, wire rod can draw more slightly, also can be combined into the multicore wire rod, if circuit breaker need also can a plurality of circuit breaker parallel connections by bigger electric current.
Described composite wire 13 is fixed on inverted U groove " U " word lowermost end by the two ends doubling and with its mid point, and the line at two ends is spread U type groove 124 respectively and from the bobbin 122 that begins to be wrapped in cold heavy parts 12 near the bobbin of U type groove 124 bottoms.
Superconduction circuit breaker provided by the invention can directly make it enter superconducting state with the cold head thermal coupling cooling contact element 123 under the downfield condition, under the super-high magnetic field condition, uses liquid helium to freeze or He
3Refrigeration, described superconduction circuit breaker is at 100 tesla's environment following times, described SmFeAsO
1-XF
XCritical temperature be 0.2k-1K.
Though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (11)
1. a superconduction circuit breaker comprises the cold heavy parts that open circuit at interval and supply the described interval of opening circuit to twine with superconducting wire, it is characterized in that the described superconducting wire at interval that opens circuit is iron-based superconducting wire SmFeAsO
1-XF
X, wherein x is 0.2-0.25.
2. superconduction circuit breaker according to claim 1 is characterized in that, described opening circuit is spaced apart composite wire, and described composite wire also comprises the constantan line that is intertwined with the iron-based superconducting wire, is provided with insulating varnish between described iron-based superconducting wire and the constantan line.
3. superconduction circuit breaker according to claim 2 is characterized in that, described open circuit adopt at interval bifilar and around method be wrapped on the described cold heavy parts.
4. superconduction circuit breaker according to claim 2 is characterized in that described superconducting wire is by SmFeAsO
1-XF
XSingle superconduction core of making and the sheath that wraps up described single superconduction core constitute.
5. superconduction circuit breaker according to claim 2 is characterized in that described superconducting wire is by SmFeAsO
1-XF
XMany superconduction cores of making and the sheath that wraps up described many superconduction cores constitute.
6. according to claim 4 or 5 described superconduction circuit breakers, it is characterized in that described superconduction core adopts powder-in-tube technique to make, described sheath is the tantalum pipe.
7. superconduction circuit breaker according to claim 3 is characterized in that, described cold heavy parts have two disks and between two disks and with the integrated bobbin of two disks, described cold heavy parts are the setting of barbell shape.
8. superconduction circuit breaker according to claim 7 is characterized in that, described cold heavy parts comprise that also a side that does not connect bobbin by disk protrudes out the cooling contact element of setting, and described cooling contact element and described disk are one-body molded.
9. superconduction circuit breaker according to claim 7 is characterized in that, described opening circuit is wrapped on the bobbin at interval, and a side surface of the close bobbin of described disk and spool surface are all coated with lacquer and scribbled low-temperature resins glue.
10. superconduction circuit breaker according to claim 7 is characterized in that, one of them side that connects bobbin of described two disks be provided with accommodate and fixedly composite wire fall " U " type groove.
11. superconduction circuit breaker according to claim 10 is characterized in that, the symmetry axis of described " U " type groove is along the radial direction of disk, and its opening extends to the bobbin place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100178306A CN103219458A (en) | 2012-01-19 | 2012-01-19 | Superconductive breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100178306A CN103219458A (en) | 2012-01-19 | 2012-01-19 | Superconductive breaker |
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| Publication Number | Publication Date |
|---|---|
| CN103219458A true CN103219458A (en) | 2013-07-24 |
Family
ID=48817071
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100178306A Pending CN103219458A (en) | 2012-01-19 | 2012-01-19 | Superconductive breaker |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433091A (en) * | 2002-01-15 | 2003-07-30 | 西门子公司 | Superconductive breaker |
| CN1555102A (en) * | 2003-12-23 | 2004-12-15 | 沈阳东软数字医疗系统股份有限公司 | Breaker of super conductive technology and its preparing method |
| US20070194870A1 (en) * | 2006-02-20 | 2007-08-23 | Hitachi, Ltd. | Permanent current switch |
| US20090286685A1 (en) * | 2006-07-14 | 2009-11-19 | Kraemer Hans-Peter | Resistive superconducting current-limiter device with bifilar coil winding composed of hts ribbon conductors and turn separator |
| CN101707083A (en) * | 2009-12-15 | 2010-05-12 | 中国科学院电工研究所 | Iron-based compound superconducting wire or tape prepared from silver sheath |
| US20100245005A1 (en) * | 2009-03-31 | 2010-09-30 | Hitachi, Ltd. | Superconducting wire rod, persistent current switch, and superconducting magnet |
-
2012
- 2012-01-19 CN CN2012100178306A patent/CN103219458A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433091A (en) * | 2002-01-15 | 2003-07-30 | 西门子公司 | Superconductive breaker |
| CN1555102A (en) * | 2003-12-23 | 2004-12-15 | 沈阳东软数字医疗系统股份有限公司 | Breaker of super conductive technology and its preparing method |
| US20070194870A1 (en) * | 2006-02-20 | 2007-08-23 | Hitachi, Ltd. | Permanent current switch |
| US20090286685A1 (en) * | 2006-07-14 | 2009-11-19 | Kraemer Hans-Peter | Resistive superconducting current-limiter device with bifilar coil winding composed of hts ribbon conductors and turn separator |
| US20100245005A1 (en) * | 2009-03-31 | 2010-09-30 | Hitachi, Ltd. | Superconducting wire rod, persistent current switch, and superconducting magnet |
| CN101707083A (en) * | 2009-12-15 | 2010-05-12 | 中国科学院电工研究所 | Iron-based compound superconducting wire or tape prepared from silver sheath |
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Application publication date: 20130724 |