CN101895284A - Electromagnetic control type superconducting switch with quick connection and disconnection - Google Patents
Electromagnetic control type superconducting switch with quick connection and disconnection Download PDFInfo
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- CN101895284A CN101895284A CN 201010225092 CN201010225092A CN101895284A CN 101895284 A CN101895284 A CN 101895284A CN 201010225092 CN201010225092 CN 201010225092 CN 201010225092 A CN201010225092 A CN 201010225092A CN 101895284 A CN101895284 A CN 101895284A
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Abstract
The invention discloses an electromagnetic control type superconducting switch with quick connection and disconnection. A critical current type superconducting switch is formed by a trigger source, a trigger switch and a superconducting noninductive coil, wherein an excitation circuit which is formed by an excitation power supply and an excitation coil and can provide an external magnetic field with controllable magnitude and direction for the superconducting coil is arranged close to the superconducting nonconductive coil. The critical current of the superconducting switch is reduced by adopting the structure, and the problem of complicated magnetic control device of the magnetic control type superconducting switch is solved; and conversion from a superconducting state to a quench state of the superconducting switch is accelerated, so the electromagnetic control type superconducting switch has the advantages of accelerating speed of connection and disconnection of the superconducting switch and realizing quick connection and disconnection.
Description
Affiliated technical field
The invention belongs to electric power system superconduction electrical technology field, be specifically related to a kind of superconducting switch of employing Electromagnetic Control of novel quick-speed turning on-off.
Background technology
Superconducting switch is the zero resistance when utilizing superconductor to be in superconducting state, low thermal conductivity matter, the character that Meisser effect and superconducting state and normality change rapidly, " switch " made device.Resistance is zero when the conducting of superconducting switch, can reduce the energy loss that the electric current in the accumulator produces to a great extent when flowing through switch; And the superconducting switch switch off time is short, and resistance change rate is bigger, is other switching device such as GTR, and MOSFET etc. can't accomplish.
Have three critical parameters during superconducting wire operation superconducting state: critical temperature, critical current, critical magnetic field.When the operational factor of superconducting wire surpassed arbitrary critical parameter, the superconducting wire superconducting characteristic will lose, therefore the closure that can control superconducting switch by the operational factor that influence superconducting wire with cut-off.The control mode of tradition superconducting switch mainly contains thermally controlled and magnet controlled.The thermally controlled superconducting switch is to utilize the heater strip that contacts with superconducting wire in the coil to realize transformation between superconducting state and the normality; Magnet controlled superconducting switch then is to utilize magnetic field to realize transformation between superconducting state and the normality, and promptly when externally-applied magnetic field surpassed the critical magnetic field of superconducting switch, superconducting switch changed normality into.
The thermally controlled superconducting switch is simple in structure, be easy to control, but the relaxation time of its thermal resistance Buddhist nun effect is longer, and limit switch cut-offs the raising of speed.The magnet controlled superconducting switch speed of cut-offfing is subjected to providing the self-induction restriction of the coil in magnetic field, it cut-offs speed and mainly limits relevant with the instantaneous power in magnetic field with the diffusion velocity of magnetic field in the superconducting switch wire rod, reasonably magnet structure can make the magnetic switch speed of cut-offfing be much higher than thermal switch, but has hysteresis phenomenon in its technical sophistication and the closing course.
In actual applications, the critical current of hts tape all bigger (for example the critical current of bismuth series superconductive wire can up to hundreds of ampere) just can make the superconducting switch quench so will feed bigger trigger current.And ohm (joule) thermal effect that big trigger current may make pad (injection of extrinsic current, flow out point) and superconducting switch quench clearly, cause the temperature of critical current formula superconducting switch to raise, and serious local temperature rise may cause the superconducting line insulation, or the joint pad melts, thereby influences the safe operation of critical current formula superconducting switch.
Summary of the invention
Above shortcoming in view of prior art, the objective of the invention is to reduce the critical current of superconducting switch, thereby it is long to solve thermally controlled superconducting switch switch off time, magnet controlled superconducting switch magnetic control means complexity, the heating unsettled shortcoming of critical current formula superconducting switch when feeding big trigger current, and the triggering source size of minimizing critical current formula superconducting switch.
The objective of the invention is to realize by following means.
A kind of electromagnetic control type superconducting switch with quick-speed turning on-off is constituting critical current formula superconducting switch by triggering source, trigger switch, superconduction noninductive coil.One energized circuit that the controlled externally-applied magnetic field of size and direction can be provided to superconducting coil that is made of a field power supply and magnet exciting coil is set near described superconduction noninductive coil.
Adopt means of the present invention,, reduced the critical current when superconducting switch cut-offs, solved magnet controlled superconducting switch magnetic control means complicated problems by increasing by a simple energized circuit; Solved the long problem of thermally controlled superconducting switch switch off time; Critical current formula superconducting switch pad (connection resistance) and superconducting switch quench resistance heating problem of unstable have been solved, and the triggering source size of minimizing critical current formula superconducting switch and the volatilization of cooling medium, quicken superconducting switch and convert the quench state to from superconducting state, cut-off speed thereby quickened superconducting switch, realize a kind of superconducting switch with quick-speed turning on-off ability.
Description of drawings
Fig. 1 is the basic principle figure of electromagnetic control type superconducting switch of the present invention
Fig. 2 is the structural representation of electromagnetic control type superconducting switch of the present invention
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Among the figure, trigger power supply (1), trigger switch (2), field power supply (3), Dewar (4, magnet exciting coil (5), externally-applied magnetic field (6), superconduction noninductive coil (7).
Can see by Fig. 1 and Fig. 2, this superconducting switch is that energized circuit is introduced in the critical current formula superconducting switch, when trigger switch (2) disconnects, magnet exciting coil (5) no power, can't discharge to superconduction noninductive coil (7) in triggering source (2), magnet exciting coil (5) does not have influence with triggering source (1) to superconducting switch, and the electric current of the superconducting switch of flowing through is less than its critical current, and switch externally still is superconducting state; After trigger switch (2) closure, field power supply (3) is powered to magnet exciting coil (5), thereby magnet exciting coil (5) provides a size to superconducting coil 7, the externally-applied magnetic field (6) that direction is controlled, described externally-applied magnetic field (6) is added on the superconducting coil (7) as required, reduced the critical current of superconducting coil (7), discharge to superconducting switch in the triggering source (1) in parallel with superconducting switch simultaneously, make the critical current of the electric current of the superconducting coil of flowing through (7) above superconducting coil (7), this moment, superconducting switch K quench became normality, in interrupting process, quicken superconducting switch and convert the quench state to, cut-off speed thereby quickened superconducting switch from superconducting state.
Described energized circuit is by field power supply (3), and magnet exciting coil (5) and trigger switch (2) are formed.Magnet exciting coil (5) can adopt the superconducting wire coiling, also can adopt the plain conductor coiling.In the operational environment of high-intensity magnetic field, big rink corner, it is slower that critical current increases decline with magnetic field, and in low-intensity magnetic field, big rink corner operational environment, critical current descends very fast with the magnetic field increase.Under same external magnetic field effect, rink corner (background magnetic field and zone face angle) is big more, and its critical electric current value is more little, therefore compares with low-intensity magnetic field, big rink corner, and when low-intensity magnetic field, little rink corner, critical current is decayed slowlyer with the increase in magnetic field.So we are enclosed within the outside of the noninductive coil of superconducting wire coiling to magnet exciting coil (5), are placed in the low temperature cold source container (Dewar), this kind structure external magnetic field rink corner is 90 ° to the maximum, and the critical current of noninductive coil descends the fastest with the increase of external magnetic field.
When trigger switch (2) is closed, field power supply (3) provides exciting current to magnet exciting coil (5), magnet exciting coil (5) provides a size, the controlled externally-applied magnetic field of direction to superconducting coil (7), thereby reduced the critical current of superconducting coil (7), discharge to superconducting switch in the triggering source (1) in parallel with superconducting switch simultaneously, make the critical current of the electric current of the superconducting coil of flowing through (7) above superconducting coil (7), this moment, superconducting switch K quench became normality, it is big that resistance becomes relatively, superconducting switch is rendered as Resistance states, is equivalent to cut-off state; Behind the break trigger switch (2), triggering source (1) and field power supply (3) stop discharge, and magnet exciting coil (5) does not have influence with triggering source (1) to superconducting switch, the electric current of superconducting switch of flowing through is lower than the superconducting switch critical current, this moment, K entered superconducting state, and it is relatively little that resistance becomes, and is equivalent to closure state.
The electromagnetic control type superconducting switch that the embodiment of the invention provides, under liquid nitrogen environment, current capacity is 100A, its breaking time is less than 5ms.It can be widely used in the high-temperature superconducting energy storage pulse power system, and other need among the Circuits System of quick-break switch.
The superconducting switch of electromagnetic control type of the present invention; above-mentioned description at preferred embodiment is too concrete; those of ordinary skill in the art will appreciate that; embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood that the protection range of inventing is not limited to such special statement and embodiment.Everyly make various possible being equal to according to foregoing description and replace or change, all be considered to belong to the protection range of claim of the present invention.
Claims (3)
1. the electromagnetic control type superconducting switch that has quick-speed turning on-off, constituting critical current formula superconducting switch by triggering source, trigger switch, superconduction noninductive coil, it is characterized in that: an energized circuit that the controlled externally-applied magnetic field of size and direction can be provided to superconducting coil that is made of a field power supply and magnet exciting coil is being set near described superconduction noninductive coil.
2. the electromagnetic control type superconducting switch with quick-speed turning on-off according to claim 1 is characterized in that: described magnet exciting coil adopts superconducting wire or plain conductor coiling magnet exciting coil to be enclosed within the outside of the noninductive coil of superconducting wire coiling.
3. according to claim 1 or 2 described electromagnetic control type superconducting switch, it is characterized in that: described energized circuit and triggering loop cut-offfing and closure by same trigger switch control energized circuit and triggering loop with high-speed switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010225092 CN101895284A (en) | 2010-07-13 | 2010-07-13 | Electromagnetic control type superconducting switch with quick connection and disconnection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010225092 CN101895284A (en) | 2010-07-13 | 2010-07-13 | Electromagnetic control type superconducting switch with quick connection and disconnection |
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| CN101895284A true CN101895284A (en) | 2010-11-24 |
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| CN 201010225092 Pending CN101895284A (en) | 2010-07-13 | 2010-07-13 | Electromagnetic control type superconducting switch with quick connection and disconnection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872919A (en) * | 2015-12-14 | 2017-06-20 | 上海联影医疗科技有限公司 | The exciting method of superconducting magnet component and superconducting magnet, drop magnetism method |
| CN113557579A (en) * | 2019-03-06 | 2021-10-26 | 托卡马克能量有限公司 | HTS magnet saturated with transmission current |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS64411A (en) * | 1987-06-23 | 1989-01-05 | Nippon Telegr & Teleph Corp <Ntt> | Superconducting pressure sensor |
| CN1095591C (en) * | 1998-09-10 | 2002-12-04 | 中国科学院电工研究所 | Method for winding non-inductive winding and superconductor switch wound by it |
| CN1956118A (en) * | 2005-10-24 | 2007-05-02 | 深圳安科高技术股份有限公司 | Suporconduction switch controlled by thermomagnetic |
| CN101447549A (en) * | 2008-11-19 | 2009-06-03 | 中国电力科学研究院 | Superconducting switch with rapid breaking capacity and rapid recovery capacity |
| CN201733287U (en) * | 2010-07-13 | 2011-02-02 | 西南交通大学 | Quick on-off electromagnetic control superconducting switch |
-
2010
- 2010-07-13 CN CN 201010225092 patent/CN101895284A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS64411A (en) * | 1987-06-23 | 1989-01-05 | Nippon Telegr & Teleph Corp <Ntt> | Superconducting pressure sensor |
| CN1095591C (en) * | 1998-09-10 | 2002-12-04 | 中国科学院电工研究所 | Method for winding non-inductive winding and superconductor switch wound by it |
| CN1956118A (en) * | 2005-10-24 | 2007-05-02 | 深圳安科高技术股份有限公司 | Suporconduction switch controlled by thermomagnetic |
| CN101447549A (en) * | 2008-11-19 | 2009-06-03 | 中国电力科学研究院 | Superconducting switch with rapid breaking capacity and rapid recovery capacity |
| CN201733287U (en) * | 2010-07-13 | 2011-02-02 | 西南交通大学 | Quick on-off electromagnetic control superconducting switch |
Non-Patent Citations (1)
| Title |
|---|
| 《船舶工程》 20071231 管磊等 基于高温超导材料的场控和流控式断路开关研究 第6-9页 1-3 第29卷, 第2期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872919A (en) * | 2015-12-14 | 2017-06-20 | 上海联影医疗科技有限公司 | The exciting method of superconducting magnet component and superconducting magnet, drop magnetism method |
| CN113557579A (en) * | 2019-03-06 | 2021-10-26 | 托卡马克能量有限公司 | HTS magnet saturated with transmission current |
| CN113557579B (en) * | 2019-03-06 | 2023-10-13 | 托卡马克能量有限公司 | HTS magnets with current-carrying saturation |
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Open date: 20101124 |